Electronic Structure And Reactivity Of Metals Surfaces
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Electronic Structure And Reactivity Of Metal Surfaces
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Author : E. Derouane
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-03-09
Electronic Structure And Reactivity Of Metal Surfaces written by E. Derouane and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-09 with Science categories.
Imagine that a young physicist would approach a granting agen cy and propose to contribute to heterogeneous catalysis by studying the heat conductivity of gases in contact with a hot filament. How would he be received now? How would he have been treated sixty years ago ? Yet, more than sixty years ago, Irving Langmuir, through his study of heat transfer from a tungsten filament, uncovered most of the fundamental ideas which are used to-day by the scientific com munity in pure and applied heterogeneous catalysis. Through his work with what were for the first time "clean" metal surfaces, Langmuir formulated during a period of a little over ten years un til the early thirties, the concepts of chemisorption, monolayer, adsorption sites, adsorption isotherm, sticking probability, cata lytic mechanisms by way of the interaction between chemisorbed spe cies, behavior of non-uniform surfaces and repulsion between adsor bed dipoles. It is fair to say that many of these ideas constituting the first revolution in surface chemistry have since been refined through thousands of investigations. Countless papers have been pu blished on the subject of the Langmuir adsorption isotherm, the Langmuir catalytic kinetics and the Langmuir site-exclusion adsorp tion kinetics. The refinements have been significant. ThE original concepts in their primitive or amended form are used everyday by catalytic chemists and chemical engineers allover the world in their treatment of experimental data, design of reactors or inven tion of new processes.
Electronic Structure And Reactivity Of Metals Surfaces
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Author : Eric Gerard Derouane
language : en
Publisher:
Release Date : 1976
Electronic Structure And Reactivity Of Metals Surfaces written by Eric Gerard Derouane and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with categories.
Electronic Structure And Reactivity Of Metal Surfaces Ed By E G Derouane And A A Lucas
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Author : E. G. Derouane
language : en
Publisher:
Release Date : 1976
Electronic Structure And Reactivity Of Metal Surfaces Ed By E G Derouane And A A Lucas written by E. G. Derouane and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with categories.
Electronic Structure And Reactivity Of Metal Surfaces Lectures Presented At A Nato Advanced Study Institute
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Author :
language : en
Publisher:
Release Date :
Electronic Structure And Reactivity Of Metal Surfaces Lectures Presented At A Nato Advanced Study Institute written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Reactions Of Organic Molecules On Metal Surfaces Studied By Stm
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Author : Markus Wahl
language : en
Publisher: Cuvillier Verlag
Release Date : 2007
Reactions Of Organic Molecules On Metal Surfaces Studied By Stm written by Markus Wahl and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
Local Density Electronic Structure Calculations On The Spectra And Reactivity Of Metals
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Author : Tapio T. Rantala
language : en
Publisher:
Release Date : 1987
Local Density Electronic Structure Calculations On The Spectra And Reactivity Of Metals written by Tapio T. Rantala and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Auger effect categories.
Electrons In Disordered Metals And At Metallic Surfaces
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Author : P. Phariseau
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Electrons In Disordered Metals And At Metallic Surfaces written by P. Phariseau and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
We present here the transcripts of lectures and talks which were delivered at the NATO ADVANCED STUDY INSTITUTE "Electrons in Disordered Hetals and at ~~etallic Surfaces" held at the State University of Ghent, Belgium between August 28 and September 9, 1978. The aim of these lectures was to highlight some of the current progress in our understanding of the degenerate electron 'liquid' in an external field which is neither uniform nor periodic. This theme brought together such topics as the electronic structure at metallic surfaces and in random metallic alloys, liquid metals and metallic glasses. As is the case in connection with infinite order ed crystals, the central issues to be discussed were the nature of the electronic spectra, the stability of the various phases and the occurrence of such phenomena as magnetism and supercon ductivity. In the theoretical lectures the emphasis was on detailed rea listic calculations based, more or less, on the density functional approach to the problem of the inhomogeneous electron liquid. How ever, where such calculations were not available, as in the case of magnetism in random alloys and that of metallic glasses, sim pler phenomenological models were used. The theoretical discussions were balanced by reviews of the most promising experimental techniques. Here the stress was on results and their relevance to the fundamental theory. lforeover, the attention had centered on those experiments which probe the electronic structure in the greatest detail.
Electronic Structure Factors In The Reactivity Of Strained And Ligand Modified Platinum Surfaces
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Author : Toyli Anniyev
language : en
Publisher:
Release Date : 2011
Electronic Structure Factors In The Reactivity Of Strained And Ligand Modified Platinum Surfaces written by Toyli Anniyev and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
The ultimate goal in catalytic design is to have complete synthetic control of the material properties that determine the reactivity. Catalysts that consist of two metals (bimetallic) allow for potential greater reactivity and more flexible design. There are two factors that contribute to the modification of the electronic properties of a metal in a bimetallic surface: strain and ligand effects. Strain effects are due to a modified atomic arrangement of surface atoms in terms of distances and may include compressed or expanded lattices. Ligand effects are caused by chemical interaction of a metal atom with other metals in its vicinity. Having complete control of the electronic properties of a particular bimetallic surface, however, remains challenging. In this thesis, we have focused on using the strain and ligand effects to controllably tune the electronic structure of a metal surface and hence the metal-adsorbate chemical bond. We have investigated the electronic factor in the modified reactivity of epitaxially strained (Pt/Cu and Pt/Ag) and ligand modified (Pt-3d-Pt, 3d = Fe, Co, Ni) platinum surfaces towards the adsorption of oxygen. The electronic nature of chemisorbed oxygen on these surfaces was studied by probing occupied and unoccupied Pt-O states using synchrotron based x-ray emission spectroscopy (XES) and x-ray absorption spectroscopy (XAS), respectively. Using XES and XAS we are able to study the electronic states relevant for surface chemical bonding. For each surface structure studied, we observed significant perturbation in the valence electronic structure of adsorbed oxygen. Observed results are discussed within the framework of the d-band model -- a theoretical tool for predicting the adsorption properties of transition metal surfaces based on the average energy of the d-band.
Metal Surface Electron Physics
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Author : A. Kiejna
language : en
Publisher: Elsevier
Release Date : 1996-03-15
Metal Surface Electron Physics written by A. Kiejna and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996-03-15 with Technology & Engineering categories.
During the last thirty years metal surface physics, or generally surface science, has come a long way due to the development of vacuum technology and the new surface sensitive probes on the experimental side and new methods and powerful computational techniques on the theoretical side. The aim of this book is to introduce the reader to the essential theoretical aspects of the atomic and electronic structure of metal surfaces and interfaces. The book gives some theoretical background to students of experimental and theoretical physics to allow further exploration into research in metal surface physics. The book consists of three parts. The first part is devoted to classical description of geometry and structure of metal crystals and their surfaces and surface thermodynamics including properties of small metallic particles. Part two deals with quantum-mechanical description of electronic properties of simple metals. It starts from the free electron gas description and introduces the many body effects in the framework of the density functional theory, in order to discuss the basic surface electronic properties of simple metals. This part outlines also properties of alloy surfaces, the quantum size effect and small metal clusters. Part three gives a succinct description of metal surfaces in contact with foreign atoms and surfaces. It treats the work function changes due to alkali metal adsorption on metals, adhesion between metals and discusses the universal aspects of the binding energy curves. In each case extensive reference lists are provided.
Final Report Theoretical Studies Of Surface Reactions On Metals And Electronic Materials
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Author :
language : en
Publisher:
Release Date : 2012
Final Report Theoretical Studies Of Surface Reactions On Metals And Electronic Materials written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
This proposal describes the proposed renewal of a theoretical research program on the structure and reactivity of molecules adsorbed on transition metal surfaces. A new direction of the work extends investigations to interfaces between solid surfaces, adsorbates and aqueous solutions and includes fundamental work on photoinduced electron transport into chemisorbed species and into solution. The goal is to discover practical ways to reduce water to hydrogen and oxygen using radiation comparable to that available in the solar spectrum. The work relates to two broad subject areas: photocatalytic processes and production of hydrogen from water. The objective is to obtain high quality solutions of the electronic structure of adsorbate-metal-surface-solution systems so as to allow activation barriers to be calculated and reaction mechanisms to be determined. An ab initio embedding formalism provides a route to the required accuracy. New theoretical methods developed during the previous grant period will be implemented in order to solve the large systems involved in this work. Included is the formulation of a correlation operator that is used to treat localized electron distributions such as ionic or regionally localized distributions. The correlation operator which is expressed as a two-particle projector is used in conjunction with configuration interaction.