Download or read book Structural Aspects of Adsorption Phenomena at Metal Surfaces written by Leslie Victor Renny and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: METALS, SURFACES, ADSORPTION, ELECTRON DIFFRACTION, ELECTRON EMISSION SPECTROSCOPY, XENON, SURFACE PROPERTIES, OXYGEN, NITROGEN, HYDROGEN SULPHIDE.
Download or read book Cohesion and Structure of Surfaces written by K. Binder and published by Elsevier. This book was released on 1995-12-18 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past fifteen years there has been a dramatic increase in the number of different surfaces whose structures have been determined experimentally. For example, whereas in 1979 there were only 25 recorded adsorption structures, to date there are more than 250. This volume is therefore a timely review of the state-of-the-art in this dynamic field. Chapter one contains a compilation of the structural data base on surfaces within a series of tables that allows direct comparison of structural parameters for related systems. Experimental structural trends amongst both clean surfaces and adsorbate systems are highlighted and discussed. The next chapter outlines the successes of local density functional theory in predicting the relaxations and reconstructions of clean metal and semiconductor surfaces, and the behaviour of adsorbates such as hydrogen, oxygen and alkali elements on metal surfaces, thereby explaining some of the experimental trends observed within the database. These ab initio density functional calculations are of ground state properties at the absolute zero of temperature. Chapter three provides an introduction to finite temperature effects in a pedagogical review of current statistical mechanical treatments of phase transitions at surfaces, many of which display the prominent role of fluctuations or non-mean field behaviour. The final chapter discusses the relationship of the reactivity of a surface to its morphology and composition, which is particularly relevant to a fundamental understanding of catalysis.
Download or read book Physical Adsorption written by L.W. Bruch and published by Courier Dover Publications. This book was released on 2007-03-29 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive account of the phenomena that occur when simple gases interact with surfaces, this text takes a fundamental perspective. Physical adsorption involves atomic or molecular films bound to surfaces by less than 0.5 eV per particle. Physically absorbed thin films exhibit remarkably diverse properties and behave in a manner characteristic of two-dimensional matter. This exploration focuses on monolayer physics, emphasizing atomic rather than molecular adsorption. The phase diagrams of physically absorbed films are diverse and rich in structure because of the subtle and varied competition between the two interactions: the mutual interaction between adsorbed molecules, and the force binding each molecule to the surface. The authors explain the microscopic origin of these forces in terms of constituent electrons and nuclei. They then examine the structural and dynamical properties of these films in the context of atomic and solid-state physics, statistical mechanics, and computer simulations. This text will be of interest to research chemists, physicists, and engineers alike, as well as students in these fields. Key literature citations allow readers to trace important developments, and thought-provoking problems are addressed in detail.
Download or read book Structure and Dynamics of Surfaces II written by Wolfram Schommers and published by Springer. This book was released on 2012-03-10 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural and dynamical properties of surfaces are of considerable importance for the elucidation of surface phenomena. For example, the adsorption of particles and chemical reactions at surfaces are influenced by these properties. Also, the electronic surface states of electronic device materials (e.g., Schottky barrier diodes and metal-insulator-semiconductor devices) depend critically on the structure of the semiconductor surface and the overlayers. As in Structure and Dynamics of Surfaces I, this Topics volume considers the problems at the mircoscopic level. It deals with ordered and disordered as well as harmonic and anharmonic surface effects. Novel experimental techniques and theoretical developments which have been applied successfully during the last decade are integrated. The contributions of this volume also include the background of the subject, typical results, and, in most cases, trends of future developments.
Download or read book Chemisorption And Reactions On Metallic Films V2 written by J Anderson and published by Elsevier. This book was released on 2012-12-02 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemisorption and Reactions on Metallic Films, Volume 2 is a four-chapter text that describes the role of evaporated metal films in advancing the understanding of the metal-gas interface chemistry and in understanding of adsorption and catalysis at metal surfaces. This volume first describes film structure and properties, particularly of random polycrystalline films, as well as the concepts of the adsorption and kinetic phenomena. The topic is followed by an overview of the main classes of catalytic reactions that have been studied over evaporated metal film catalysts. A chapter explores the preparation, characterization, structure, and surface properties of alloy films. The theory of the oxidation of metals and the advantages and disadvantages of using thin metal films in oxidation work are considered in the concluding chapter, along with a brief discussion on their use in kinetic and mechanistic studies. Research scientists and graduate students who are interested in the fundamentals of adsorption and catalysis will find this volume invaluable.
Download or read book Structure and Dynamics of Surfaces II written by Wolfram Schommers and published by Springer. This book was released on 1987-09-25 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural and dynamical properties of surfaces are of considerable importance for the elucidation of surface phenomena. For example, the adsorption of particles and chemical reactions at surfaces are influenced by these properties. Also, the electronic surface states of electronic device materials (e.g., Schottky barrier diodes and metal-insulator-semiconductor devices) depend critically on the structure of the semiconductor surface and the overlayers. As in Structure and Dynamics of Surfaces I, this Topics volume considers the problems at the mircoscopic level. It deals with ordered and disordered as well as harmonic and anharmonic surface effects. Novel experimental techniques and theoretical developments which have been applied successfully during the last decade are integrated. The contributions of this volume also include the background of the subject, typical results, and, in most cases, trends of future developments.
Download or read book Introduction to the Properties of Crystal Surfaces written by J. M. Blakely and published by Elsevier. This book was released on 2013-10-22 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to the Properties of Crystal Surfaces is an introductory text on crystal surfaces and their properties. A variety of phenomena, including electron emission, adsorption and oxidation, adhesion, friction, nucleation and epitaxial growth, and heterogeneous catalysis, are described by considering the details of the atomic and electronic structure in the surface region. This volume is comprised of seven chapters and begins with a discussion on the thermodynamics of surfaces, along with the equilibrium configuration at the intersection of interfaces and the effects of curvature of crystalline surfaces. The next chapter examines the properties of interfaces in multi-component systems, followed by an analysis of experimental measurements of surface tension in solids. The atomic structure of crystal surfaces and some theoretical aspects of surface studies are also considered, and experimental methods in used in such studies are outlined. The final chapter deals with two atomic processes that are involved in a number of reactions at crystal surfaces: surface atomic diffusion and adsorption. This book is intended for senior undergraduates in a materials science type of curriculum or those beginning research work in the field or associated areas.
Download or read book Adsorption on Metal Surfaces written by Jacques Bénard and published by Elsevier Science & Technology. This book was released on 1983 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evolution in methods of investigation and concepts; Properties of clean metal substrates; Equilibrium adsorption and surface segregation; Structure and crystallography of adsorbed layers; Epitaxial growth: the problem of the interface; Effects of adsorption on some fundamental substrate properties; Adsorption - desorption kinetics and catalysis on single crystals; Influence of adsorption on electrochemical properties; Composition of grain boundaries in binary alloys; The influence of chemisorption on adhesion and friction.
Download or read book Chemical Bonding at Surfaces and Interfaces written by Anders Nilsson and published by Elsevier. This book was released on 2011-08-11 with total page 533 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular surface science has made enormous progress in the past 30 years. The development can be characterized by a revolution in fundamental knowledge obtained from simple model systems and by an explosion in the number of experimental techniques. The last 10 years has seen an equally rapid development of quantum mechanical modeling of surface processes using Density Functional Theory (DFT). Chemical Bonding at Surfaces and Interfaces focuses on phenomena and concepts rather than on experimental or theoretical techniques. The aim is to provide the common basis for describing the interaction of atoms and molecules with surfaces and this to be used very broadly in science and technology. The book begins with an overview of structural information on surface adsorbates and discusses the structure of a number of important chemisorption systems. Chapter 2 describes in detail the chemical bond between atoms or molecules and a metal surface in the observed surface structures. A detailed description of experimental information on the dynamics of bond-formation and bond-breaking at surfaces make up Chapter 3. Followed by an in-depth analysis of aspects of heterogeneous catalysis based on the d-band model. In Chapter 5 adsorption and chemistry on the enormously important Si and Ge semiconductor surfaces are covered. In the remaining two Chapters the book moves on from solid-gas interfaces and looks at solid-liquid interface processes. In the final chapter an overview is given of the environmentally important chemical processes occurring on mineral and oxide surfaces in contact with water and electrolytes. Gives examples of how modern theoretical DFT techniques can be used to design heterogeneous catalysts This book suits the rapid introduction of methods and concepts from surface science into a broad range of scientific disciplines where the interaction between a solid and the surrounding gas or liquid phase is an essential component Shows how insight into chemical bonding at surfaces can be applied to a range of scientific problems in heterogeneous catalysis, electrochemistry, environmental science and semiconductor processing Provides both the fundamental perspective and an overview of chemical bonding in terms of structure, electronic structure and dynamics of bond rearrangements at surfaces
Download or read book Atomic and Ionic Impact Phenomena on Metal Surfaces written by M. Kaminsky and published by Springer Science & Business Media. This book was released on 2013-03-08 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: The collisions of neutral or charged gaseous particles with solid surfaces govern many physical and chemical phenomena, as has been The gas/solid phenomena in turn depend on a recognized for a long time. great variety of processes such as the charge transfer of the gas/solid interface, adsorption and desorption, the energy transfer between an incident particle and the surface, etc. Our knowledge of these processes, however, is only fragmentary. This is partly due to the difficulty in adequately controlling the ex perimental conditions. Consequently, until recently the data were usually so complex that reliable information about a particular elementary process could not be deduced. Within the last five to ten years, however, the techniques of ultra-high vacuum and surface preparation have developed rapidly and there has been a booming and widespread interest in the role of gas/solid interactions in such diverse fields as plasma physics, thermonuclear reactions, thermionic energy conversion, ion propulsion, sputtering corrosion of the surface of satellites and ion engines, ion getter pumps, deposition of thin films, etc. This led to extensive investigations of numerous gas/solid phenomena, such as surface ionization, sputtering, emission of secondary electrons and ions from surfaces under atom and/or ion impact, ion neutralization, and the thermal accomodation of gaseous particles on surfaces. As a result, it has become possible to gather a variety of valuable information.
Download or read book Structural Study of Electrochemically Induced Adsorption and Diffusion on Metal Surfaces written by Douglas Dean Sneddon and published by . This book was released on 1995 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the first part of this thesis, the scanning tunneling microscopy (STM) was used to characterize adsorbates physisorbed onto conductive surfaces. The STM is ideal for this because it is capable of obtaining real space images of local electronic and topographic features with atomic resolution. It also has the ability to perform in many different environments, including electrolyte, air, cryogen, and vacuum. Unless the adsorbate is chemisorbed to the surface, the adsorbate diffuses across the surface due to thermal instability which causes difficulties in imaging. This problem can be overcome by lowering the temperature of the substrate. We have built a variable temperature STM, capable of operating at liquid helium temperatures. Initial results show the ability of the instrument to image benzene physisorbed onto a graphite substrate. Further work will focus on imaging other adsorbates on gold surfaces. Scanning tunneling spectroscopy (STS) will also be utilized in order to study the electronic properties of both the surface and the adsorbate. In the second part of this thesis, metal surfaces have been characterized through the use of scanning force microscopy. Scanning force microscopy is an ideal method for analyzing electrode surfaces in situ. In the first study, atomic force microscopy (AFM) was used to examine underpotentially deposited (upd) monolayers of Pb on Cu(111) in dilute acid solutions. Pb upd on Cu(111) forms a (111) close packed structure in both perchloric acid and acetic acid. In perchloric acid, the Pb overlayer is rotated $2spcircpm2spcirc$ with respect to the Cu(111) substrate. A rotation could not be determined in acetic acid due to the obscured images of the Cu(111) substrate before the Pb upd. In the second study, AFM and lateral force microscopy (LFM) were used to study the Ag(111) electrode surface in fluoride, sulfate, perchlorate, and chloride-containing electrolytes under potential control. Short range images reveal only the Ag(111) structure in each of these electrolytes. Long range images show step formation in both the perchlorate and chloride solutions. This effect is not seen with either sulfate or fluoride. In the third study, the structure of halide adlayers and Ag-halide growth on Ag(111) was studied by AFM as a function of electrode potential. For solutions containing F$sp-$ and Cl$sp-,$ only the underlying Ag(111) structure was observed while ordered overlayers were present for Br$sp-$ and I$sp-$-containing solutions. Long range images revealed a different electrode response for all four electrolytes. Lastly, AFM and LFM were utilized to study surface diffusion of a Ag(111) electrode surface in various electrolyte solutions under potential control. In I$sp-$-containing solutions enhanced surface diffusion is observed. The rate of diffusion can be controlled by varying the potential in solutions containing Br$sp-$ while in F$sp-$-containing solution the rate of diffusion remains constant.
Download or read book Surface Chemical Compounds and Their Role in Adsorption Phenomena written by A. Kiselev and published by . This book was released on 1959 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Activated Carbon Surfaces in Environmental Remediation written by Teresa J. Bandosz and published by Elsevier. This book was released on 2006-02-27 with total page 587 pages. Available in PDF, EPUB and Kindle. Book excerpt: Activated Carbon Surfaces in Environmental Remediation provides a comprehensive summary of the environmental applications of activated carbons. In order to understand the removal of contaminants and pollutants on activated carbons, the theoretical bases of adsorption phenomena are discussed. The effects of pore structure and surface chemistry are also addressed from both science and engineering perspectives. Each chapter provides examples of real applications with an emphasis on the role of the carbon surface in adsorption or reactive adsorption. The practical aspects addressed in this book cover the broad spectrum of applications from air and water cleaning and energy storage to warfare gas removal and biomedical applications. This book can serve as a handbook or reference book for graduate students, researchers and practitioners with an interest in filtration, water treatment, adsorbents and air cleaning, in addition to environmental policies and regulations. Addresses fundamental carbon science and how it relates to applications of carbon surfaces Describes the broad spectrum of activated carbon applications in environmental remediation Serves as a handbook or reference book for graduate students, researchers and practitioners in the field
Download or read book Electronic Structure and Reactivity of Metal Surfaces written by E. Derouane and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Structure and Dynamics of Surfaces I written by W. Schommers and published by Springer Science & Business Media. This book was released on 2013-03-08 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last decade, surface research has clearly shifted its interest from the macroscopic to the microscopic scale; a wealth of novel experimental techniques and theoretical methods have been applied and developed successfully. The Topics volume at hand gives an account of this tendency. For the understanding of surface phenomena and their exploitation in tech nical applications, the theoretical and experimental analysis at the microscopic level is of particular interest. In heterogeneous catalysis, for example, a chemical reaction takes place at the interface of two phases, and the process occurring at the surface is composed of a sequence of individual microscopic steps. These individual steps include adsorption, desorption, surface diffusion, and reaction on the surface. These elementary steps are greatly influenced by the structure and the dynamics of the surface region. Especially the catalytic activity may strongly depend on the structure of the catalyst's surface. The necessity of per forming surface investigations on a microscopic scale is also reflected clearly in research work relating to metal-semiconductor interfaces which determine es sentially the properties of electronic device materials. The experimental probe on the atomic scale, coupled with parallel theoretical calculations, showed that the electronic properties of a metal-semiconductor interface strongly depend on the crystallographic structure of the semiconductor; in particular, it is im portant to know in this context the modification of the atomic arrangement in the surface region caused by the termination of the crystal by the surface.
Download or read book Gas Adsorption in Metal Organic Frameworks written by T. Grant Glover and published by CRC Press. This book was released on 2018-09-03 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text discusses the synthesis, characterization, and application of metal-organic frameworks (MOFs) for the purpose of adsorbing gases. It provides details on the fundamentals of thermodynamics, mass transfer, and diffusion that are commonly required when evaluating MOF materials for gas separation and storage applications and includes a discussion of molecular simulation tools needed to examine gas adsorption in MOFs. Additionally, the work presents techniques that can be used to characterize MOFs after gas adsorption has occurred and provides guidance on the water stability of these materials. Lastly, applications of MOFs are considered with a discussion of how to measure the gas storage capacity of MOFs, a discussion of how to screen MOFs to for filtration applications, and a discussion of the use of MOFs to perform industrial separations, such as olefin/paraffin separations. Throughout the work, fundamental information, such as a discussion on the calculation of MOF surface area and description of adsorption phenomena in packed-beds, is balanced with a discussion of the results from research literature.
Download or read book Metal Oxide Nanoparticles 2 Volume Set written by Oliver Diwald and published by John Wiley & Sons. This book was released on 2021-09-14 with total page 903 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxide Nanoparticles A complete nanoparticle resource for chemists and industry professionals Metal oxide nanoparticles are integral to a wide range of natural and technological processes—from mineral transformation to electronics. Additionally, the fields of engineering, electronics, energy technology, and electronics all utilize metal oxide nanoparticle powders. Metal Oxide Nanoparticles: Formation, Functional Properties, and Interfaces presents readers with the most relevant synthesis and formulation approaches for using metal oxide nanoparticles as functional materials. It covers common processing routes and the assessment of physical and chemical particle properties through comprehensive and complementary characterization methods. This book will serve as an introduction to nanoparticle formulation, their interface chemistry and functional properties at the nanoscale. It will also act as an in-depth resource, sharing detailed information on advanced approaches to the physical, chemical, surface, and interface characterization of metal oxide nanoparticle powders and dispersions. Addresses the application of metal oxide nanoparticles and its economic impact Examines particle synthesis, including the principles of selected bottom-up strategies Explores nanoparticle formulation—a selection of processing and application routes Discusses the significance of particle surfaces and interfaces on structure formation, stability and functional materials properties Covers metal oxide nanoparticle characterization at different length scales With this valuable resource, academic researchers, industrial chemists, and PhD students can all gain insight into the synthesis, properties, and applications of metal oxide nanoparticles.
