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Laser Induced Thermal Desorption Studies Of Simple Adsorbates On Single Crystal Metal And Oxide Surfaces
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Book Synopsis Laser Induced Thermal Desorption Studies of Simple Adsorbates on Single Crystal Metal and Oxide Surfaces by : D. Laurence Meixner
Download or read book Laser Induced Thermal Desorption Studies of Simple Adsorbates on Single Crystal Metal and Oxide Surfaces written by D. Laurence Meixner and published by . This book was released on 1992 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Studies of Surface Diffusion and Chemical Reactions on Clean and Chemically-modified Single Crystal Metal Surfaces Using Laser-induced Thermal Desorption by : John L. Brand
Download or read book Studies of Surface Diffusion and Chemical Reactions on Clean and Chemically-modified Single Crystal Metal Surfaces Using Laser-induced Thermal Desorption written by John L. Brand and published by . This book was released on 1989 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermal Desorption and Laser Induced Thermal Desorption with FTMS Studies of Small Hydrocarbons on an Oxidized Titanium Foil by : Elvira Delgado
Download or read book Thermal Desorption and Laser Induced Thermal Desorption with FTMS Studies of Small Hydrocarbons on an Oxidized Titanium Foil written by Elvira Delgado and published by . This book was released on 2006 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Dynamics of Adsorption on Clean and Adsorbate-Modified Transition Metal and Metal Oxide Surfaces by :
Download or read book The Dynamics of Adsorption on Clean and Adsorbate-Modified Transition Metal and Metal Oxide Surfaces written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Research directed toward understanding the dynamical factors governing the adsorption of molecules typically involved in heterogeneous catalytic processes has been continued at Harvard. Adsorption is the first step in any catalytic process, and predictions of rates of adsorption are fundamental to calculations of rates of catalytic reactions. Often activation of the bonds within the molecule proceed via a molecular precursor, and the rate of activation is determined by competitive bond activation and desorption of this precursor. Thus predictive capabilities for the adsorption probabilities of hydrocarbons become important for understanding the rates of simple reactions involving alkanes, such as reforming. In this work we have focused on the dynamics of molecular adsorption of low molecular weight alkanes on single crystal surfaces of platinum group metals in order to understand how different physical properties of the metals affect different trapping (adsorption) probabilities of the alkanes. The overall objective of these studies was to make a quantitative comparison of the molecular probabilities of C2-C4 alkanes on different metals in order to assess the effects of the structures of the different alkanes and the intrinsic differences of the metals on the reactivity of the alkanes. This work built on previous studies with platinum and palladium single crystal surfaces for which we were able to apply molecular dynamic simulations to quantitatively predict trapping probabilities of low molecular weight alkanes for palladium directly from measured values of the trapping of ethane (only) on Pt(111). The trapping probabilities for the alkanes are higher on Pd(111) due to a larger dissipation of energy to lattice vibrations upon collision, suggesting a general scaling of trapping with the lattice force constant for different metal surfaces, provided the surface structure is not too different. In this grant period we have thus focused on the dynamics of molecular adsorption of low molecular weight alkanes on single crystal surfaces of platinum, palladium, copper, silver and nickel in order to assess this scaling directly. We observe that the trapping of each of the alkanes studied decreases with the lattice stiffness and mass of the metal atom, but not as strongly as predicted by the lattice for constant itself. These observations are in general agreement with the expectations of molecular dynamic simulations, but further theoretical work is needed to understand the trends in detail.
Book Synopsis Adsorption and Thin-film Adhesion on Single-crystalline Surfaces by : Jason R. V. Sellers
Download or read book Adsorption and Thin-film Adhesion on Single-crystalline Surfaces written by Jason R. V. Sellers and published by . This book was released on 2013 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical bonding at solid surfaces and interfaces is influential in a wide range of important technological applications including catalysis, fuel cells, batteries, chemical sensors, and device fabrication for microelectronics, computers, solar cells, and all variety of coatings. Adsorption and adhesion energetics are key elements in understanding interfacial properties, and these properties can be used to develop functional industrial materials. First, the properties of single-crystalline oxide surfaces are reviewed in detail, particularly in regards to the adsorption energetics of these surfaces. This includes the largest collection of experimental adsorption data on single-crystalline oxide surfaces ever presented, from which trends in the thermodynamic properties of adsorbates are revealed which greatly expand our understanding of the physical processes occurring on these surfaces. Among these trends is the discovery that the entropy of adsorbed molecules tracks their gas-phase entropy, retaining ~2/3 of that entropy upon adsorption. This allows for a method of predicting not only entropies of adsorption, but also the kinetic prefactors associated with many classes of elementary surface reactions. These estimations of desorption prefactors are then used to improve calculations of adsorption energies from temperature programmed desorption (TPD) measurements for many systems. Metal adsorption on oxide surfaces and the strength of the binding at metal / oxide interfaces are then discussed. The motivation here is to understand oxide-supported transition metal nanoparticles such as those used in industrial heterogeneous catalysis. For metal atom adsorption, adsorption energetics and adhesion energies are directly related to the energy of the adsorbed atoms, which define their stability, sintering rates, and reactivity, and which are found to vary with both the size of the nanoparticle and the nature of the oxide support. The experimental techniques necessary for obtaining these values, as well as the data analysis involved, is explained, and in several cases improved upon. In particular, a new single crystal adsorption calorimeter capable of making the first direct measurements of adsorption energies for metals with high bulk cohesive energies has recently been completed. These studies greatly expand upon the understanding of and ability to measure the thermodynamic properties associated with adsorption on single-crystalline surfaces.
Book Synopsis Spectroscopic Studies of Adsorbates on Metal Single Crystal Surfaces by : Paul David Austin Pudney
Download or read book Spectroscopic Studies of Adsorbates on Metal Single Crystal Surfaces written by Paul David Austin Pudney and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1995 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :American Chemical Society. Committee on Professional Training Publisher : ISBN 13 :9780841227231 Total Pages :1700 pages Book Rating :4.2/5 (272 download)
Book Synopsis ACS Directory of Graduate Research 1993 by : American Chemical Society. Committee on Professional Training
Download or read book ACS Directory of Graduate Research 1993 written by American Chemical Society. Committee on Professional Training and published by . This book was released on 1993 with total page 1700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Photoemission and Thermal Desorption Studies of the Adsorption of Simple Molecules on Transition Metals and Alloys by : Kenneth Keung Yum Yu
Download or read book Photoemission and Thermal Desorption Studies of the Adsorption of Simple Molecules on Transition Metals and Alloys written by Kenneth Keung Yum Yu and published by . This book was released on 1976 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Adsorption and Reactions of Simple Molecules on Metal Single Crystal Surfaces by : M. Surman
Download or read book Adsorption and Reactions of Simple Molecules on Metal Single Crystal Surfaces written by M. Surman and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Vibrational Spectroscopic Studies of Adsorbates on Metal and Silicon Single Crystal Surfaces by : Andrew B. Horn
Download or read book Vibrational Spectroscopic Studies of Adsorbates on Metal and Silicon Single Crystal Surfaces written by Andrew B. Horn and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Abstracts written by and published by . This book was released on 1991 with total page 2682 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals Abstracts written by and published by . This book was released on 1989 with total page 1132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Book of Abstracts written by and published by . This book was released on 2000 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Referativnyĭ zhurnal written by and published by . This book was released on 1990 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1991 with total page 1586 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Physics of Surfaces and Interfaces by : Harald Ibach
Download or read book Physics of Surfaces and Interfaces written by Harald Ibach and published by Springer Science & Business Media. This book was released on 2006-11-18 with total page 653 pages. Available in PDF, EPUB and Kindle. Book excerpt: This graduate-level textbook covers the major developments in surface sciences of recent decades, from experimental tricks and basic techniques to the latest experimental methods and theoretical understanding. It is unique in its attempt to treat the physics of surfaces, thin films and interfaces, surface chemistry, thermodynamics, statistical physics and the physics of the solid/electrolyte interface in an integral manner, rather than in separate compartments. It is designed as a handbook for the researcher as well as a study-text for graduate students. Written explanations are supported by 350 graphs and illustrations.
