A Study Of Bimetallic Palladium And Copper Electrocatalysts For The Electrochemical Oxidation Of Formate And Reduction Of Co2 Into Formate And Ethylene

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A Study of Bimetallic Palladium and Copper Electrocatalysts for the Electrochemical Oxidation of Formate and Reduction of CO2 Into Formate and Ethylene

Author : Wei Jyun Wang
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.3/5 (799 download)

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Book Synopsis A Study of Bimetallic Palladium and Copper Electrocatalysts for the Electrochemical Oxidation of Formate and Reduction of CO2 Into Formate and Ethylene by : Wei Jyun Wang

Download or read book A Study of Bimetallic Palladium and Copper Electrocatalysts for the Electrochemical Oxidation of Formate and Reduction of CO2 Into Formate and Ethylene written by Wei Jyun Wang and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study focuses on fuel cells using formate (HCOO-) and the electrochemical conversion of carbon dioxide (CO2) into HCOO- and ethylene. HCOO- has been considered as one of those promising alternative energy carriers, which can be fed into a direct HCOO- fuel cell (DFFC) to generate electricity via the HCOO- oxidation (FO) reaction (FOR). Moreover, HCOO- can be produced via the electrochemical reduction of CO2 (eCO2R). This makes possible the development of a sustainable, regenerative energy system combining an eCO2R unit and a DFFC to produce electricity with net zero CO2 emission. Furthermore, HCOO- can be fed into an electrochemical reforming reactor to produce hydrogen (H) via FOR. In addition, CO2 can also be reused to produce valuable C2 compounds such as ethanol, ethylene etc., which are conventionally produced via energy-intensive processes. Amongst catalysts, palladium (Pd) is one of the few metals that can be used for both, the FOR and the eCO2R into HCOO- (eCO2RF) at low overpotential. For the electrochemical reduction of CO2 into C2 compounds (eCO2RC2), multiple studies have focused on using copper (Cu) as the electrocatalyst. However, the low current density and high cost of Pd prohibit its application as an electrocatalyst at the industrial scale. In this research, we investigated two nano-catalysts aiming to improve the catalytic activity of Pd-based materials for the FOR and eCO2RF. This was achieved by modifying the electronic surface property of the catalysts via synthesizing bimetallic Pd-based nanoparticles (NPs). Carbon supported CuPd (CuPd/C), Iron Iron Oxide (Fe FeOx) supported Pd (Fe FeOx/Pd) NPs were prepared via the adsorbate-induced surface segregation method and the successive salt reduction method, respectively. The eCO2RC2 were also investigated on the surface with different electronic properties: aluminum (Al), Cu, Cu (I) oxide (Cu2O), Cu (II) oxide (CuO), stainless steel 304, and titanium (Ti). Finally, since C2 compounds can also be used as fuel to generate H2, we have studied the oxidation of ethanol using the caustic aqueous phase electrochemical reforming process, which converts liquid oxygenated hydrocarbons at high-pressure to high purity H2. This process captures the produced CO2 within the electrolyte solution producing a near-zero CO2 emission.

Recent advances in nanoscale engineering of Pd-based electrocatalysts for selective CO2 electroreduction to formic acid/formate

Author : Shangqing Sun
Publisher : OAE Publishing Inc.
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4./5 ( download)

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Book Synopsis Recent advances in nanoscale engineering of Pd-based electrocatalysts for selective CO2 electroreduction to formic acid/formate by : Shangqing Sun

Download or read book Recent advances in nanoscale engineering of Pd-based electrocatalysts for selective CO2 electroreduction to formic acid/formate written by Shangqing Sun and published by OAE Publishing Inc.. This book was released on 2024-03-26 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrochemical conversion of carbon dioxide (CO2) into high-value chemicals and fuels driven by electricity derived from renewable energy has been recognized as a promising strategy to achieve carbon neutrality and create sustainable energy. Particularly from the viewpoint of the product values and the economic viability, selective CO2 reduction to formic acid/formate has shown great promise. Palladium (Pd) has been demonstrated as the only metal that can produce formic acid/formate perfectly near the equilibrium potential; yet, it still suffers from CO poisoning, poor stability and competitive CO pathway at high overpotentials. Herein, recent progress of Pd-based electrocatalysts for selective CO2 electroreduction and their mechanistic understanding are reviewed. First, the fundamentals of electrochemical CO2 reduction and the reaction pathway of formic acid/formate on Pd are presented. Then, recent advances in the rational design and nanoscale engineering strategies of Pd-based electrocatalysts for further improving CO2 reduction activity and selectivity to formic acid/formate product, including size control, morphology and shape control, alloying, heteroatom doping, surface-strain engineering, and phase control, are discussed from the perspectives of both experimental and computational aspects. Finally, we discuss the pertinent challenges and describe the future prospects and opportunities in terms of the development of electrocatalysts, electrolyzers and characterization techniques in this research field.

Electrode Kinetics for Chemists, Chemical Engineers, and Materials Scientists

Author : Eliezer Gileadi
Publisher : Capstone
ISBN 13 : 9781560816263
Total Pages : 620 pages
Book Rating : 4.8/5 (162 download)

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Book Synopsis Electrode Kinetics for Chemists, Chemical Engineers, and Materials Scientists by : Eliezer Gileadi

Download or read book Electrode Kinetics for Chemists, Chemical Engineers, and Materials Scientists written by Eliezer Gileadi and published by Capstone. This book was released on 1993 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offering a thorough explanation of electrode kinetics, this textbook emphasizes physical phenomena - rather than mathematical formalism - and elucidates the underlying principles of the different experimental techniques. Assuming an elementary knowledge of thermodynamics and chemical kinetics and minimal mathematical skills, coverage explores the arguments of two primary schools of thought: electrode kinetics and interfacial electrochemistry viewed as a branch of physical chemistry and from the perspective of analytical chemistry.

Electrocatalysis in Balancing the Natural Carbon Cycle

Author : Yaobing Wang
Publisher : John Wiley & Sons
ISBN 13 : 3527349138
Total Pages : 60 pages
Book Rating : 4.5/5 (273 download)

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Book Synopsis Electrocatalysis in Balancing the Natural Carbon Cycle by : Yaobing Wang

Download or read book Electrocatalysis in Balancing the Natural Carbon Cycle written by Yaobing Wang and published by John Wiley & Sons. This book was released on 2021-08-23 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrocatalysis in Balancing the Natural Carbon Cycle Explore the potential of electrocatalysis to balance an off-kilter natural carbon cycle In Electrocatalysis in Balancing the Natural Carbon Cycle, accomplished researcher and author, Yaobing Wang, delivers a focused examination of why and how to solve the unbalance of the natural carbon cycle with electrocatalysis. The book introduces the natural carbon cycle and analyzes current bottlenecks being caused by human activities. It then examines fundamental topics, including CO2 reduction, water splitting, and small molecule (alcohols and acid) oxidation to prove the feasibility and advantages of using electrocatalysis to tune the unbalanced carbon cycle. You’ll realize modern aspects of electrocatalysis through the operando diagnostic and predictable mechanistic investigations. Further, you will be able to evaluate and manage the efficiency of the electrocatalytic reactions. The distinguished author presents a holistic view of solving an unbalanced natural carbon cycle with electrocatalysis. Readers will also benefit from the inclusion of: A thorough introduction to the natural carbon cycle and the anthropogenic carbon cycle, including inorganic carbon to organic carbon and vice versa An exploration of electrochemical catalysis processes, including water splitting and the electrochemistry CO2 reduction reaction (ECO2RR) A practical discussion of water and fuel basic redox parameters, including electrocatalytic materials and their performance evaluation in different electrocatalytic cells A perspective of the operando approaches and computational fundamentals and advances of different electrocatalytic redox reactions Perfect for electrochemists, catalytic chemists, environmental and physical chemists, and inorganic chemists, Electrocatalysis in Balancing the Natural Carbon Cycle will also earn a place in the libraries of solid state and theoretical chemists seeking a one-stop reference for all aspects of electrocatalysis in carbon cycle-related reactions.

Electrochemical and Electrocatalytic Reactions of Carbon Dioxide

Author : B.P. Sullivan
Publisher : Elsevier
ISBN 13 : 0444596615
Total Pages : 314 pages
Book Rating : 4.4/5 (445 download)

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Book Synopsis Electrochemical and Electrocatalytic Reactions of Carbon Dioxide by : B.P. Sullivan

Download or read book Electrochemical and Electrocatalytic Reactions of Carbon Dioxide written by B.P. Sullivan and published by Elsevier. This book was released on 2012-12-02 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recycling of atmospheric molecules for use as fuels and chemicals is a goal which can only be achieved through a deeper understanding of catalytic processes, particularly electrocatalysis whereby redox transformations can be interfaced with solar or nuclear energy input. Carbon dioxide is a prototypical small molecule in many regards since it is chemically inert. In addition, because of the likely role of carbon dioxide in global temperature cycles, it will be imperative in the future to regulate the output from industrial processes. The purpose of this book is to present a unified discussion of the carbon dioxide chemistry which is necessary for the understanding and design of electrochemically-driven processes for the reduction of carbon dioxide and to provide an impetus for the further development of electrocatalytic carbon dioxide chemistry.

Laser-induced Graphene

Author : Ruquan Ye
Publisher :
ISBN 13 : 9789814877275
Total Pages : 88 pages
Book Rating : 4.8/5 (772 download)

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Book Synopsis Laser-induced Graphene by : Ruquan Ye

Download or read book Laser-induced Graphene written by Ruquan Ye and published by . This book was released on 2020-11-30 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: LIG is a revolutionary technique that uses a common CO2 infrared laser scriber, like the one used in any machine shop, for the direct conversion of polymers into porous graphene under ambient conditions. This technique combines the preparation and patterning of 3D graphene in a single step, without the use of wet chemicals. The ease in the structural engineering and excellent mechanical properties of the 3D graphene obtained have made LIG a versatile technique for applications across many fields. This book compiles cutting-edge research on LIG by different research groups all over the world. It discusses the strategies that have been developed to synthesize and engineer graphene, including controlling its properties such as porosity, composition, and surface characteristics. The authors are pioneers in the discovery and development of LIG and the book will appeal to anyone involved in nanotechnology, chemistry, environmental sciences, and device development, especially those with an interest in the synthesis and applications of graphene-based materials.

Electrocatalytic Oxidation of Formate with Rh(III) and Co(III) Electrocatalysts

Author : Daniel Louis Kellenberger
Publisher :
ISBN 13 :
Total Pages : 141 pages
Book Rating : 4.:/5 (957 download)

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Book Synopsis Electrocatalytic Oxidation of Formate with Rh(III) and Co(III) Electrocatalysts by : Daniel Louis Kellenberger

Download or read book Electrocatalytic Oxidation of Formate with Rh(III) and Co(III) Electrocatalysts written by Daniel Louis Kellenberger and published by . This book was released on 2015 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract Electrocatalytic Oxidation of Formate with Rh(III) and Co(III) Electrocatalysts By Daniel Louis Kellenberger Doctor of Philosophy in Chemistry University of California, Berkeley Professor John Arnold, Chair Chapter 1. The hydrogen fuel cell is an environmentally friendly alternative to fossil fuel combustion for the powering of vehicles and other mobile applications. The storage of hydrogen in appreciable densities and the difficulty of its distribution are prohibitive factors for the large scale, societal adoption of current hydrogen fuel cell technologies. A hydrogen fuel cell based on the reversible storage of hydrogen equivalents in liquid, organic substrates would alleviate both of these issues. A hydrogen fuel cell based on the hydrogenated/dehydrogenated pair of formic acid and carbon dioxide is a promising example that would allow for the regeneration of the fuel at an external plant away from the point of release. There exist numerous examples of the dehydrogenation of formic acid to generate dihydrogen. However, the direct electrocatalytic oxidation of formic acid to its constituent protons, electrons, and carbon dioxide byproduct is presented as a more attractive alternative that would allow for the incorporation of a homogeneous electrocatalyst into the fuel cell itself. A generalized mechanism is envisaged that would allow for the direct electrocatalytic oxidation of formic acid by a homogenous, organometallic electrocatalyst. Chapter 2. The Rh(III)-centered complex [Cp*Rh(bpy)(MeCN)][PF6]2 (Cp* = pentamethylcyclopentadienyl, bpy = 2,2'-bipyridyl) was selected as a possible electrocatalyst for the electrocatalytic oxidation of formate. Analogues for each of the intermediates in the electrocatalytic cycle as presented in Chapter 1 were either isolated, modelled, or directly observed. The Rh(I) complexes Cp*Rh(bpy) and Cp*Rh(phen) (phen = 6,10-phenanthroline) were synthesized and the latter was structurally characterized. Reaction of the Rh(III) complex with formate in acetonitrile resulted in decomposition but coordination of formate was modelled with the isolation of the acetate analogue, [Cp*Rh(bpy)(OAc)][PF6]. The complex [Cp*Rh(6,6'-Me2-2,2'-bipyridyl)(MeCN)][PF6]2 featuring a bulkier chelating ligand was synthesized and monitoring the reaction with formate in acetonitrile by 1H NMR revealed the in situ generation of a Rh(III) hydride, [Cp*Rh(6,6'-Me2-2,2'-bipyridyl)(H)]+. Electrocatalytic oxidation of formate in benzonitrile was achieved as determined by constant potential coulometry experiments conducted at the impressive potential of -900 mV vs. Ag/Ag+. Chapter 3. A series of Rh(III) electrocatalysts were synthesized of the type [Cp*Rh(chelate)(MeCN)]2+ (1) featuring the chelates (a) 2,2'-bipyridyl, (b) 6,10-phenanthroline, (c) 4,4'-Me2-2,2'-bipyridyl, and (d) 6,6'-Me2-2,2'-bipyridyl to determine the influence of the chelate on the complex's observed reactivity. Computational chemistry was in agreement with the proposal that the observation of two electrochemical reductions for complexes 1a-c resulted from an equilibrium in solution of 1 with a 16-electron complex, [Cp*Rh(chelate)]2+. The solid state structures of 1a-d determined by single crystal, x-ray diffraction experiments and the gas phase structures calculated with computational chemistry suggested the observed irreversible electrochemical reduction of 1d was due to increased steric effects from its bulkier chelating ligand which would favor dissociation upon reduction. Additionally, a system of calculations were developed to address the competing abilities of the Rh(III) hydrides to act as proton sources or hydride donors with the former being desired for the electrocatalytic oxidation of formate observed in Chapter 2. Chapter 4. [Cp*Co(bpy)(MeCN)]2+ was synthesized and characterized as a first-row analogue the Rh(III) electrocatalysts studied in Chapter 2 and Chapter 3. A new, simplified synthesis of [Cp*Co(MeCN)3][PF6]2 was achieved by reaction of Cp*Co(CO)2 with two equivalents of AgPF6 in acetonitrile. Reaction of the tris-acetonitrile complex with either 2,2'-bipyridyl or 6,6'-Me2-2,2'-bipyridyl resulted in the generation of the complex [Cp*Co(chelate)(MeCN)][PF6]2. Unlike with the Rh(III) analogues, reaction of the [Cp*Co(bpy)(MeCN)][PF6]2 species with formate generated an isolable Co-formate adduct, [Cp*Co(chelate)(OC(O)H)][PF6]2. The addition of formate to [Cp*Co(bpy)(MeCN)][PF6]2 to generate the Co-formate adduct in situ resulted in the appreciable anodic shift of the oxidation potential of formate by ca. 750 mV.

Gaseous Carbon Waste Streams Utilization

Author : National Academies of Sciences, Engineering, and Medicine
Publisher : National Academies Press
ISBN 13 : 0309483360
Total Pages : 257 pages
Book Rating : 4.3/5 (94 download)

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Book Synopsis Gaseous Carbon Waste Streams Utilization by : National Academies of Sciences, Engineering, and Medicine

Download or read book Gaseous Carbon Waste Streams Utilization written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2019-02-22 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the quest to mitigate the buildup of greenhouse gases in Earth's atmosphere, researchers and policymakers have increasingly turned their attention to techniques for capturing greenhouse gases such as carbon dioxide and methane, either from the locations where they are emitted or directly from the atmosphere. Once captured, these gases can be stored or put to use. While both carbon storage and carbon utilization have costs, utilization offers the opportunity to recover some of the cost and even generate economic value. While current carbon utilization projects operate at a relatively small scale, some estimates suggest the market for waste carbon-derived products could grow to hundreds of billions of dollars within a few decades, utilizing several thousand teragrams of waste carbon gases per year. Gaseous Carbon Waste Streams Utilization: Status and Research Needs assesses research and development needs relevant to understanding and improving the commercial viability of waste carbon utilization technologies and defines a research agenda to address key challenges. The report is intended to help inform decision making surrounding the development and deployment of waste carbon utilization technologies under a variety of circumstances, whether motivated by a goal to improve processes for making carbon-based products, to generate revenue, or to achieve environmental goals.

Atomic and Nano Scale Materials for Advanced Energy Conversion, 2 Volumes

Author : Zongyou Yin
Publisher : John Wiley & Sons
ISBN 13 : 3527348921
Total Pages : 887 pages
Book Rating : 4.5/5 (273 download)

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Book Synopsis Atomic and Nano Scale Materials for Advanced Energy Conversion, 2 Volumes by : Zongyou Yin

Download or read book Atomic and Nano Scale Materials for Advanced Energy Conversion, 2 Volumes written by Zongyou Yin and published by John Wiley & Sons. This book was released on 2022-04-18 with total page 887 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atomic and Nano Scale Materials for Advanced Energy Conversion Discover the latest advancements in energy conversion technologies used to develop modern sustainable energy techniques In Atomic and Nano Scale Materials for Advanced Energy Conversion, expert interdisciplinary researcher Dr. Zongyou Yin delivers a comprehensive overview of nano-to-atomic scale materials science, the development of advanced electrochemical, photochemical, photoelectrochemical, and photovoltaic energy conversion strategies, and the applications for sustainable water splitting and other technologies. The book offers readers cutting-edge information of two-dimensional nano, mixed-dimensional nano, nano rare earth, clusters, and single atoms. It constructively evaluates emerging nano-to-atomic scale energy conversion technologies for academic research and development (R&D) researchers and industrial technique consultants and engineers. The author sets out a systematic analysis of recent energy-conversion science, covering topics like adaptable manufacturing of Van der Waals heterojunctions, mixed-dimensional junctions, tandem structures, and superlattices. He also discusses function-oriented engineering in polymorphic phases, photon absorption, excitons-charges conversion, non-noble plasmonics, and solid-liquid-gas interactions. Readers will also benefit from: A thorough introduction to emerging nanomaterials for energy conversion, including electrochemical, photochemical, photoelectrochemical, and photovoltaic energy conversion An exploration of clusters for energy conversion, including electrochemical, photochemical, and photoelectrochemical clusters Practical discussions of single atoms for energy conversion in electrochemical, photochemical, and photoelectrochemical energy conversion technologies A thorough analysis of future perspectives and directions in advanced energy conversion technology Perfect for materials scientists, photochemists, electrochemists, and inorganic chemists, Atomic and Nano Scale Materials for Advanced Energy Conversion is also a must-read resource for catalytic chemists interested in the intersection of advanced chemistry and physics in energy conversion technologies.

Functionalized Nanomaterials for Catalytic Application

Author : Chaudhery Mustansar Hussain
Publisher : John Wiley & Sons
ISBN 13 : 1119808979
Total Pages : 530 pages
Book Rating : 4.1/5 (198 download)

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Book Synopsis Functionalized Nanomaterials for Catalytic Application by : Chaudhery Mustansar Hussain

Download or read book Functionalized Nanomaterials for Catalytic Application written by Chaudhery Mustansar Hussain and published by John Wiley & Sons. This book was released on 2021-07-21 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: Functionalized Nanomaterials for Catalytic Application

Carbon Dioxide Utilization to Sustainable Energy and Fuels

Author : Inamuddin
Publisher : Springer Nature
ISBN 13 : 3030728773
Total Pages : 354 pages
Book Rating : 4.0/5 (37 download)

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Book Synopsis Carbon Dioxide Utilization to Sustainable Energy and Fuels by : Inamuddin

Download or read book Carbon Dioxide Utilization to Sustainable Energy and Fuels written by Inamuddin and published by Springer Nature. This book was released on 2021-11-30 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited book provides an in-depth overview of carbon dioxide (CO2) transformations to sustainable power technologies. It also discusses the wide scope of issues in engineering avenues, key designs, device fabrication, characterizations, various types of conversions and related topics. It includes studies focusing on the applications in catalysis, energy conversion and conversion technologies, etc. This is a unique reference guide, and one of the detailed works is on this technology. The book is the result of commitments by leading researchers from various backgrounds and expertise. The book is well structured and is an essential resource for scientists, undergraduate, postgraduate students, faculty, R&D professionals, energy chemists and industrial experts.

Electro-Fenton Process

Author : Minghua Zhou
Publisher : Springer
ISBN 13 : 9811064067
Total Pages : 437 pages
Book Rating : 4.8/5 (11 download)

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Book Synopsis Electro-Fenton Process by : Minghua Zhou

Download or read book Electro-Fenton Process written by Minghua Zhou and published by Springer. This book was released on 2017-11-25 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume discusses the theoretical fundamentals and potential applications of the original electro-Fenton (EF) process and its most innovative and promising versions, all of which are classified as electrochemical advanced oxidation processes. It consists of 15 chapters that review the latest advances and trends, material selection, reaction and reactor modeling and EF scale-up. It particularly focuses on the applications of EF process in the treatment of toxic and persistent organic pollutants in water and soil, showing highly efficient removal for both lab-scale and pre-pilot setups. Indeed, the EF technology is now mature enough to be brought to market, and this collection of contributions from leading experts in the field constitutes a timely milestone for scientists and engineers.

Investigation of Highly Efficient Bismuth-based Electrocatalysts for CO2 Electroreduction to Formate

Author : Shaoqing Liu
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)

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Book Synopsis Investigation of Highly Efficient Bismuth-based Electrocatalysts for CO2 Electroreduction to Formate by : Shaoqing Liu

Download or read book Investigation of Highly Efficient Bismuth-based Electrocatalysts for CO2 Electroreduction to Formate written by Shaoqing Liu and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Renewable energy-powered electrochemical CO2 reduction (ECR) is considered as a promising approach to producing high value-added chemicals to mitigate the ever-increasing accumulation of CO2 in the atmosphere. It could offer a sustainable route to achieving both carbon neutrality in the energy cycle and the storage of renewable energy. Among all the possible products of CO2 reduction, formate has attracted great attention because it is being widely explored as a hydrogen storage material and chemical fuel for fuel cells. It is therefore highly desirable to pursue efficient electrocatalysts for ECR toward formate production. However, the high reaction energy barrier and complicated multi proton-coupled electron transfer steps result in the slow kinetics and broad distributions of the products over most electrocatalysts. Meanwhile, the highly competitive side reaction, hydrogen evolution reaction (HER), always occurs accompanying with ECR. Therefore, the key issue for practical formate production via ECR lies in searching for efficient catalysts that can actively and selectively transform CO2. In this thesis, I aim to develop efficient, cost-effective, and earth-abundant bismuth-based catalysts for simultaneously achieving high activity and selectivity towards ECR, and also to explore and reveal the reaction mechanisms that lead to the enhancement effects of the developed catalysts. One of the key issues for most of the existing Bi-based catalysts toward ECR is that they do not simultaneously possess high activity (current density > 45 mA cm-2) and high selectivity [faradaic efficiency (FE)] > 90 % in H-cell. Hence, I developed a catalyst of S-doped Bi2O3 nanosheets (NSs) coupled with carbon nanotubes (S-Bi2O3-CNT) and investigated its ECR performance. Compared with the undoped control catalyst (Bi2O3-CNT), the S-Bi2O3-CNT not only exhibits an outstanding catalytic activity for CO2 to formate conversion through ECR, but also can maintain high faradaic efficiency (FE ˃ 90 %) of formate at high current density (48.6 mA cm-2), which outperforms most of the previously reported catalysts. Theoretical calculations reveal that the S doping causes the electronic delocalization of Bi sites, which can benefit the CO2 adsorption and stabilize *OCHO intermediates while suppressing HER through hindering *H adsorption. All these synergistically favor formate production over H2 evolution. The limited solubility and diffusion of CO2 in an aqueous solution greatly limit the current catalysts to maintain the high formate selectivity and activity over a wide potential window. I developed a catalyst of Bi2O3 NSs grown on carbon nanofiber (Bi2O3@C/HB) with inherent hydrophobicity and applied it for ECR toward formate production. In H-cell system, Bi2O3@C/HB achieved high formate Faradaic efficiency (FEformate) of ˃93 % over an extremely wide potential window of 1000 mV and a peak formate current density of 102.1 mA cm-2. In addition, the developed Bi2O3@C/HB demonstrated a good antiflooding capability when operating in a flow-cell system and can deliver a current density of 300 mA cm-2. Molecular dynamics simulations indicate that the hydrophobic can create a favorable solid-liquid-gas triple-phase boundary which boosts the ECR activity through forming a highly concentrated CO2 layer and meanwhile inhibiting HER by reducing proton contacts. Thermodynamic analysis suggests the counter anodic oxygen evolution reaction (OER) consumes ~ 90 % of the overall energy input in a full ECR electrolyzer because of its sluggish kinetics. Its product, O2, is not of significant economic value. Herein, I present a pair-electrosynthesis tactic for low energy generation of formate via coupling selectively anodic electrochemical ethylene glycol oxidation (EGO) and cathodic ECR. I used Ni modified Co phosphide grown on nickel foam (NiCoP/NF) and single Cu atom doped Bi (BiCu) as efficient anodic and cathodic electrocatalysts, respectively. The prepared NiCoP/NF exhibited high performance for anodic EGO to formate conversion with >90 % selectivity and a current density of 500 mA cm-2. Meanwhile, the cathodic BiCu catalysts can simultaneously achieve high activity, selectivity, and long stability for formate production from ECR. Consequently, the new coupled ECR-EGO system can operate at a cell voltage of ~ 760 mV lower as compared to the conventional ECR-OER system.

Carbon Dioxide Electrochemistry

Author : Marc Robert
Publisher : Royal Society of Chemistry
ISBN 13 : 1788015460
Total Pages : 461 pages
Book Rating : 4.7/5 (88 download)

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Book Synopsis Carbon Dioxide Electrochemistry by : Marc Robert

Download or read book Carbon Dioxide Electrochemistry written by Marc Robert and published by Royal Society of Chemistry. This book was released on 2020-10-20 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: Homogeneous and Heterogeneous Catalysis

The Reduction of Carbon Dioxide to Formic Acid

Author : Weldon G. Brown
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis The Reduction of Carbon Dioxide to Formic Acid by : Weldon G. Brown

Download or read book The Reduction of Carbon Dioxide to Formic Acid written by Weldon G. Brown and published by . This book was released on 1949 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Noble Metal-Based Nanocomposites

Author : Jun Yang
Publisher : John Wiley & Sons
ISBN 13 : 3527344527
Total Pages : 454 pages
Book Rating : 4.5/5 (273 download)

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Book Synopsis Noble Metal-Based Nanocomposites by : Jun Yang

Download or read book Noble Metal-Based Nanocomposites written by Jun Yang and published by John Wiley & Sons. This book was released on 2019-06-10 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a systematic and coherent picture of the solution-based methods for the preparation of noble metal-based composite nanomaterials, their characterization, and potential applications in electrocatalysis Within the last decade, the development of wet-chemistry methods has led to the blossom of research in composite nanomaterials. However, the design and synthesis of composite nanomaterials with controlled properties remains a significant challenge. This book summarizes the solution-based methods for the preparation of noble metal-based composite nanomaterials. It examines their characterization, as well as their use in electrocatalysis. It also discusses the intrinsic relationship between the catalytic properties and the physical /chemical effects in the composite materials, and offers some perspectives for the future development of metal-based composite nanomaterials. In addition, the book not only provides a systematic and coherent picture of this field, but also inspires rethinking of the current processing technologies. Noble Metal-Based Nanocomposites: Preparation and Applications offers in-depth chapter coverage of ethanol-mediated phase transfer of metal ions and nanoparticles. It presents the full range of nanocomposites consisting of chalcogenide semiconductors and gold, silver sulfide, or other noble metals. It also examines core-shell structured cadmium selenide-platinum nanocomposites; Pt-containing Ag2S-noble metal nanocomposites for direct methanol fuel cells operated at high fuel concentrations; and nanocomposites consisting of metal oxides and noble metals. In addition, the book looks at scientific issues derived from noble metal-based nanocomposites. -Covers all of the preparations of noble metal-based nanocomposites and their numerous applications -Highlights some of the recent breakthroughs in the design, engineering, and applications of noble metal-based nanocomposites -Appeals to a wide range audience, especially researchers in the areas of catalysis, chemistry, chemical engineering, materials synthesis and characterization, and fuel cell Noble Metal-Based Nanocomposites: Preparation and Applications is an excellent book for inorganic chemists, materials scientists, catalytic chemists, chemical engineers, and those interested in the subject.

Direct Alcohol Fuel Cells

Author : Horacio R. Corti
Publisher : Springer Science & Business Media
ISBN 13 : 9400777086
Total Pages : 377 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis Direct Alcohol Fuel Cells by : Horacio R. Corti

Download or read book Direct Alcohol Fuel Cells written by Horacio R. Corti and published by Springer Science & Business Media. This book was released on 2013-12-02 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: Direct Alcohol Fuel Cells: Materials, Performance, Durability and Applications begins with an introductory overview of direct alcohol fuel cells (DAFC); it focuses on the main goals and challenges in the areas of materials development, performance, and commercialization. The preparation and the properties of the anodic catalysts used for the oxidation of methanol, higher alcohols, and alcohol tolerant cathodes are then described. The membranes used as proton conductors in DAFC are examined, as well as alkaline membranes, focusing on the electrical conductivity and alcohol permeability. The use of different kinds of carbon materials as catalyst supports, gas diffusion layers, and current collectors in DAFC is also discussed. State of the art of the modeling is used to estimate performance and durability. The closing chapter reviews the use of DAFC in portable equipment and mobile devices and features a detailed discussion on the mechanisms of component degradation which limits their durability. This book is written to facilitate the understanding of DAFC technology, applications, and future challenges. It is an excellent introduction for electrochemical and material engineers interested in small fuel cells as portable energy sources, scientists focused on materials science for energy production and storage, as well as policy-makers in the area of renewable energies.