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Mechanistic Insights Into The Direct Synthesis Of H2o2 On Transition Metal Catalysts
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Book Synopsis Mechanistic Insights Into the Direct Synthesis of H2O2 on Transition Metal Catalysts by : Neil Marshall Wilson
Download or read book Mechanistic Insights Into the Direct Synthesis of H2O2 on Transition Metal Catalysts written by Neil Marshall Wilson and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biomimetic Transition Metal Catalysts by :
Download or read book Biomimetic Transition Metal Catalysts written by and published by . This book was released on 2008 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Asymmetric Synthesis and Mechanistic Insights of Transition-Metal-Catalyzed Hydrogenation by : Jianping Yang
Download or read book Asymmetric Synthesis and Mechanistic Insights of Transition-Metal-Catalyzed Hydrogenation written by Jianping Yang and published by . This book was released on 2022 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Kinetics of Heterogeneous Catalytic Reactions by : Michel Boudart
Download or read book Kinetics of Heterogeneous Catalytic Reactions written by Michel Boudart and published by Princeton University Press. This book was released on 2014-07-14 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a critical account of the principles of the kinetics of heterogeneous catalytic reactions in the light of recent developments in surface science and catalysis science. Originally published in 1984. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
Book Synopsis Solar-to-Chemical Conversion by : Hongqi Sun
Download or read book Solar-to-Chemical Conversion written by Hongqi Sun and published by John Wiley & Sons. This book was released on 2021-04-29 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive book systematically covers the fundamentals in solar energy conversion to chemicals, either fuels or chemical products. It includes natural photosynthesis with emphasis on artificial processes for solar energy conversion and utilization. The chemical processes of solar energy conversion via homogeneous and/or heterogeneous photocatalysis has been described with the mechanistic insights. It also consists of reaction systems toward a variety of applications, such as water splitting for hydrogen or oxygen evolution, photocatalytic CO2 reduction to fuels, and light driven N2 fixation, etc. This unique book offers the readers a broad view of solar energy utilization based on chemical processes and their perspectives for future sustainability.
Book Synopsis Theoretical Aspects of Transition Metal Catalysis by : Gernot Frenking
Download or read book Theoretical Aspects of Transition Metal Catalysis written by Gernot Frenking and published by Springer. This book was released on 2010-11-13 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transition metal catalysis belongs to the most important chemical research areas because a ubiquitous number of chemical reactions are catalyzed by transition metal compounds. Many efforts are being made by industry and academia to find new and more efficient catalysts for chemical processes. Transition metals play a prominent role in catalytic research because they have been proven to show an enormous diversity in lowering the activation barrier for chemical reactions. For many years, the search for new catalysts was carried out by trial and error, which was costly and time consuming. The understanding of the mechanism of the catalytic process is often not very advanced because it is difficult to study the elementary steps of the catalysis with experimental techniques. The development of modern quantum chemical methods for calculating possible intermediates and transition states was a breakthrough in gaining an understanding of the reaction pathways of transition metal catalyzed reactions. This volume, organized into eight chapters written by leading scientists in the field, illustrates the progress made during the last decade. The reader will obtain a deep insight into the present state of quantum chemical research in transition metal catalysis.
Book Synopsis Mechanistic Insights Into the Preferential CO Oxidation in H2-rich Gas (PROX) Over Supported Noble Metal Catalysts by : Markus Matthias Schubert
Download or read book Mechanistic Insights Into the Preferential CO Oxidation in H2-rich Gas (PROX) Over Supported Noble Metal Catalysts written by Markus Matthias Schubert and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterization of Heterogeneous Catalysts by : Francis Delannay
Download or read book Characterization of Heterogeneous Catalysts written by Francis Delannay and published by Marcel Dekker. This book was released on 1984 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigations Into the Direct Synthesis of Hydrogen Peroxide and CO Oxidation Using Precious Metal Catalysts by : Simon James Freakley
Download or read book Investigations Into the Direct Synthesis of Hydrogen Peroxide and CO Oxidation Using Precious Metal Catalysts written by Simon James Freakley and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The direct synthesis of hydrogen peroxide from molecular hydrogen and oxygen represents an attractive atom efficient alternative to the current industrial auto-oxidation process which relies on the sequential oxidation and reduction of an anthraquinone. The first and most widely studied catalysts for this reaction were palladium based however over-hydrogenation of the synthesised hydrogen peroxide is a problem. Recent advances demonstrate that the addition of gold to the catalyst has been shown to significantly improve the productivity of the catalysts by suppressing the hydrogenation and decomposition activity. The work in this thesis shows that tin can be used as a catalyst additive as a direct replacement for gold by a simple impregnation method. By tuning the heat treatments of these bimetallic tin-palladium catalysts it was possible to switch off the competing hydrogenation and decomposition reactions. The construction of a small scale flow system has allowed the independent study of reaction variables and the determination of global kinetics and rate constants for the synthesis and subsequent reactions. It was shown that in a flow system it was the decomposition reaction that had a greater limiting effect on the production of hydrogen peroxide than the hydrogenation reaction. A study was also carried out into CO oxidation using gold / iron oxide catalyst prepared in Cardiff and by Prof. Haruta's group in Tokyo. These catalysts underwent extensive tests to try and identify the active species of the catalyst. Detailed testing and STEM characterisation of the samples identified the possibility of different mechanisms operating at different temperatures and no correlation between the nanoparticle population and activity at sub ambient temperature could be made which challenges the hypothesis that nanoparticles are the most active species and that sub nanometer clusters may be the active species at low temperatures.
Book Synopsis Mechanistic Insights Into Co and Methanol Oxidation on Unsupported Mono- and Bi-metallic Coinage Metal Catalysts by : Wilke Dononelli
Download or read book Mechanistic Insights Into Co and Methanol Oxidation on Unsupported Mono- and Bi-metallic Coinage Metal Catalysts written by Wilke Dononelli and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modern Physical Organic Chemistry by : Eric V. Anslyn
Download or read book Modern Physical Organic Chemistry written by Eric V. Anslyn and published by University Science Books. This book was released on 2006 with total page 1148 pages. Available in PDF, EPUB and Kindle. Book excerpt: In additionto covering thoroughly the core areas of physical organic chemistry -structure and mechanism - this book will escortthe practitioner of organic chemistry into a field that has been thoroughlyupdated.
Download or read book Catalysis written by James Spivey and published by Royal Society of Chemistry. This book was released on 2020-01-17 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Catalysts are required for a variety of applications and researchers are increasingly challenged to find cost effective and environmentally benign catalysts to use. This volume looks at modern approaches to catalysis and reviews the extensive literature. Chapters highlight reactions active under oxidative coupling of methane conditions and how they are interlinked, heterogeneous nickel catalysts and their use in laboratory and industry, the reaction mechanism of heterogeneous catalysis with the surface science probe, the concepts of electroless deposition (ED) methods for preparation of true bimetallic catalysts, the general subject of metal-support interactions occurring over ruthenium-based catalysts and benzene as the target volatile organic compound (VOC). Appealing broadly to researchers in academia and industry, these illustrative chapters bridge the gap from academic studies in the laboratory to practical applications in industry not only for catalysis field but also for environmental protection. The book will be of great benefit to any researcher wanting a succinct reference on developments in this area now and looking to the future.
Book Synopsis The 100 Most Important Chemical Compounds by : Richard L. Myers
Download or read book The 100 Most Important Chemical Compounds written by Richard L. Myers and published by Bloomsbury Publishing USA. This book was released on 2007-08-30 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: What is a chemical compound? Compounds are substances that are two or more elements combined together chemically in a standard proportion by weight. Compounds are all around us - they include familiar things, such as water, and more esoteric substances, such as triuranium octaoxide, the most commonly occurring natural source for uranium. This reference guide gives us a tour of 100 of the most important, common, unusual, and intriguing compounds known to science. Each entry gives an extensive explanation of the composition, molecular formula, and chemical properties of the compound. In addition, each entry reviews the relevant chemistry, history, and uses of the compound, with discussions of the origin of the compound's name, the discovery or first synthesis of the compound, production statistics, and uses of the compound.
Book Synopsis PEM Fuel Cell Electrocatalysts and Catalyst Layers by : Jiujun Zhang
Download or read book PEM Fuel Cell Electrocatalysts and Catalyst Layers written by Jiujun Zhang and published by Springer Science & Business Media. This book was released on 2008-08-26 with total page 1147 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proton exchange membrane (PEM) fuel cells are promising clean energy converting devices with high efficiency and low to zero emissions. Such power sources can be used in transportation, stationary, portable and micro power applications. The key components of these fuel cells are catalysts and catalyst layers. “PEM Fuel Cell Electrocatalysts and Catalyst Layers” provides a comprehensive, in-depth survey of the field, presented by internationally renowned fuel cell scientists. The opening chapters introduce the fundamentals of electrochemical theory and fuel cell catalysis. Later chapters investigate the synthesis, characterization, and activity validation of PEM fuel cell catalysts. Further chapters describe in detail the integration of the electrocatalyst/catalyst layers into the fuel cell, and their performance validation. Researchers and engineers in the fuel cell industry will find this book a valuable resource, as will students of electrochemical engineering and catalyst synthesis.
Book Synopsis Design, Synthesis, Mechanistic Rationalization and Application of Asymmetric Transition-metal Catalysts by : Christian Hedberg
Download or read book Design, Synthesis, Mechanistic Rationalization and Application of Asymmetric Transition-metal Catalysts written by Christian Hedberg and published by . This book was released on 2005 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Zinc Catalysis by : Stephan Enthaler
Download or read book Zinc Catalysis written by Stephan Enthaler and published by John Wiley & Sons. This book was released on 2015-04-27 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filling the gap in the market for comprehensive coverage of this hot topic, this timely book covers a wide range of organic transformations, e. g. reductions of unsaturated compounds, oxidation reactions, Friedel-Crafts reactions, hydroamination reactions, depolymerizations, transformations of carbon dioxide, oxidative coupling reactions, as well as C-C, C-N, and C-O bond formation reactions. A chapter on the application of zinc catalysts in total synthesis is also included. With its aim of stimulating further research and discussion in the field, this is a valuable reference for professionals in academia and industry wishing to learn about the latest developments.
Book Synopsis Homogeneous Catalytic Oxygen Reduction by Monomeric Cobalt Complexes by : Yu-Heng Wang (Ph.D.)
Download or read book Homogeneous Catalytic Oxygen Reduction by Monomeric Cobalt Complexes written by Yu-Heng Wang (Ph.D.) and published by . This book was released on 2018 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: The oxygen reduction reaction (ORR) plays an important role in various life processes such as respiration and in energy conversion systems such as fuel cells and metal-air batteries. Achieving a selective and efficient ORR remains a significant challenge in energy conversion, where the sluggish kinetics of the ORR has also restricted its practical application. Platinum group metal (PGM) catalysts are currently the best-performing candidates for efficient reduction of O2 with overpotential less than 300 mV. However, scientists are exploring non-PGM ORR catalysts, due to their high abundance and low cost. Molecular first row transition-metal complexes, such as those macrocyclic ligands containing cobalt are the main representatives of non-precious ORR catalysts. This thesis details the comprehensive investigation of the selectivity, overpotential, mechanistic studies, and linear free energy relationship (LFER) analysis of homogeneous O2 reduction to H2O2 and H2O catalyzed by a series of monomeric cobalt complexes. Chapters 2-4 of this thesis depicts the homogeneous 2e[-]/2H+ O2 reduction catalyzed by a series of cobalt complexes bearing tetradentate N2O2-based ligands (Co(N2O2)). These studies show that H2O2 is directly produced from molecular O2 with an effective overpotential as low as 90 mV. A linear dependence of logarithm of turnover frequency (log(TOF)) is observed with respect to effective overpotential suggesting there exists a trade-off between the rate and overpotential for ORR with these Co(N2O2) complexes. However, the dependence is weaker compared with that of iron porphyrin (Fe(por)) complexes, which is rationalized by the different influence of effective overpotential on their turnover-limiting step. The subsequent mechanistic studies reveal that the protonation on the proximal oxygen atom of the CoIII(OOH) intermediate is the rate-limiting step in the ORR. Density functional theory (DFT) studies, in combination with kinetic and electrochemical studies, provide deeper mechanistic insights into the O2 reduction catalyzed by Co(N2O2) complexes. The small Brønsted coefficient and O2-independent rate law imply that the low-overpotential O2 reduction is achievable because the ORR rate is relatively insusceptible to the effective overpotential. The performance of monomeric cobalt ORR catalysts bearing N4-macrocyclic ligands reported in the literature is evaluated on the basis of their TOF and effective overpotential. It is shown for the first time that they all fall in the linear relationships between log(TOF) and effective overpotential. Chapters 5-7 of this thesis highlight the exploration of the homogeneous 4e[-]/4H+ reduction of O2 to H2O catalyzed by a series of cobalt porphyrin (Co(por)) complexes. The catalysis-initiating potential of the Co(por) complexes (half-wave potential, E1/2(CoIII/II)) is found to be independent of the pKa values of the acids, but the potential shift for O2/H2O redox couples is nearly 59 mV/pKa in organic media. This outcome suggests that the effective overpotential is correlated with the acid strength following Nernstian behavior of 59 mV/pKa unit. Thus, selective homogeneous 4e[-]/4H+ O2 reduction to H2O with effective overpotentials as low as 50 mV is achieved by using high-potential Co(por) complexes and modulating the O2/H2O redox couple with different acids. A second effect of this modulation is that the selective reduction of O2 to H2O is observed when the E1/2(CoIII/II) of the monomeric cobalt complexes are above the O2/H2O2 redox couple, implying that the ORR selectivity is tunable based on thermodynamic constraints. A crossover in the LFER of the O2 reduction mediated by the same Co(por) complex exhibits that the susceptibility of the log(TOF) to effective overpotential changes with the ORR selectivity (H2O vs. H2O2). The different slopes of the relationship between log(TOF) and effective overpotential for O2/H2O and O2/H2O2 is elucidated by their distinctive rate laws and catalytic mechanisms. Finally, the different LFERs for the O2 reduction catalyzed by monomeric cobalt and iron complexes between the log(TOF) and effective overpotential are attributed to their different Brønsted coefficients, rate laws, and catalytic mechanisms, and the performance of molecular cobalt and iron ORR catalysts are quantitatively evaluated with LFER analyses. Collectively, this thesis delineates the opportunities for the utilization of molecular cobalt catalysts for achieving selective 2e-/2H+ and 4e[-]/4H+ reduction of O2 with low overpotentials. The overpotential can be tuned using different cobalt catalysts and reaction media under homogeneous conditions, and this feature serves as the basis for switching the selectivity from H2O2 to H2O or vice versa based on thermodynamic restraints.
