Download Heterogeneous Catalysis Of Mixed Oxides Book PDF

Download full Heterogeneous Catalysis Of Mixed Oxides books PDF, EPUB, Tuebl, Textbook, Mobi or read online Heterogeneous Catalysis Of Mixed Oxides anytime and anywhere on any device. Get free access to the library by create an account, fast download and ads free. We cannot guarantee that every book is in the library.

Heterogeneous Catalysis of Mixed Oxides

Heterogeneous Catalysis of Mixed Oxides
  • Author : M. Misono
  • Publisher :Unknown
  • Release Date :2013-02-28
  • Total pages :192
  • ISBN : 9780444538345
GET BOOK HERE

Summary : Mixed oxides are the most widely used catalyst materials for industrial catalytic processes. The principal objective of this book is to describe systematically the mixed oxide catalysts, from their fundamentals through their practical applications. After describing concisely general items concerning mixed oxide and mixed oxide catalysts, two important mixed oxide catalyst materials, namely, heteropolyacids and perovskites, are taken as typical examples and discussed in detail. These two materials have several advantages: 1. They are, respectively, typical examples of salts of oxoacids and double oxide, that is, the two main categories of mixed oxides in solid state chemistry. 2. Both exhibit excellent catalytic performance in nearly crystalline state and are used in several industrial applications. 3. They have studied for many years. In addition, metal oxides functioning as a catalyst support (carrier) are included. Although the supports are very important in practical applications, and tremendous progress has been made in the past decades, few systematic reviews exist. It is notable that heteropolyacids and perovskite exhibit unique performance when used as a support. Fundamental catalytic science and technology and solid state chemistry necessary is presented for the proper understanding of mixed oxide catalysts as well as for R&D. For the latter, the concept of design of practical catalysts is very important. This is considered throughout the book. Systematically describes design principles of mixed oxide catalysts Shows how catalysis and solid-state chemistry of metal oxides are inter-related Covers all useful basic concepts of mixed oxide catalysis

Heterogeneous Catalysis of Mixed Oxides

Heterogeneous Catalysis of Mixed Oxides
  • Author : Makoto Misono
  • Publisher :Unknown
  • Release Date :2013-02-28
  • Total pages :192
  • ISBN : 9780128081099
GET BOOK HERE

Summary : The chemistry of metal oxides, both single and mixed metal oxides, relevant to heterogeneous catalysis such as relationships among the composition, structure, and chemical properties of mixed oxides, is provided in perspective. The important chemical properties in heterogeneous catalysis are acid–base and reduction–oxidation (redox) properties, where ionic radii, electronegativity, valency, and tendency to form covalent bond of constituent elements are most influential. Structural factors such as lattice defects and nonstoichiometry are also relevant. Although the surface of metal oxides is different from the solid bulk and changes depending on various factors, the surface reflects more or less the solid bulk and the knowledge of bulk properties is useful to understand the catalysis of mixed oxides. In some cases, the solid bulk actually takes part in catalysis. Other fundamental features of metal oxide catalysis like synergistic effects of more than two different active sites (acid and base, acid and oxidation, etc.) are also discussed.

Heterogeneous Catalysis of Mixed Oxides

Heterogeneous Catalysis of Mixed Oxides
  • Author : Makoto Misono
  • Publisher :Unknown
  • Release Date :2013-02-28
  • Total pages :192
  • ISBN : 9780128081129
GET BOOK HERE

Summary : Several substantial examples of mixed oxide supports that show unique and interesting roles as catalyst supports are described. The examples are perovskites and heteropoly compounds as supports for finely dispersed metals, ceria–zirconia related mixed oxides as supports for noble metals in automobile catalysts, and zeolites for atomically dispersed noble metals. In addition, the general roles of catalyst supports are briefly summarized. Among the different roles of supports, the most important are dispersing the catalytically active components and increasing their surface area, and improving the catalytic performance through chemical interactions between the active component and the support.

Heterogeneous Catalysis of Mixed Oxides

Heterogeneous Catalysis of Mixed Oxides
  • Author : Makoto Misono
  • Publisher :Unknown
  • Release Date :2013-02-28
  • Total pages :192
  • ISBN : 9780128081082
GET BOOK HERE

Summary : A concise introduction is given to the fundamental knowledge required to understand the heterogeneous catalysis of mixed oxides and to the concept of catalyst design. The fundamental knowledge includes the rate versus equilibrium relation; rate equation; the mechanism of catalytic reaction; essential functions of a catalyst, namely, activity, selectivity, and durability (or life); and catalytic reaction engineering such as mass and heat transfer. Typical methods for the preparation and characterization of catalysts and for the elucidation of the reaction mechanism, as well as a short history of industrial catalysts, are also provided.

Heterogeneous Catalysis of Mixed Oxides

Heterogeneous Catalysis of Mixed Oxides
  • Author : Makoto Misono
  • Publisher :Unknown
  • Release Date :2013-02-28
  • Total pages :192
  • ISBN : 9780128081105
GET BOOK HERE

Summary : The chemistry and catalysis of perovskites are described. “Perovskites” are defined here as double oxides having perovskite (ABO3) and related structures. Double oxides are one of the two major groups of mixed oxides. Because of their thermal stability and a variety of physical and chemical properties, which can be controlled by choosing constituent elements, they are widely used as catalysts as well as electronic and magnetic materials. First, an overview is given of the structural characteristics of perovskites, including lattice defects and nonstoichiometry, and the redox properties are interpreted on the basis of the composition and structure. Then the catalysis and catalyst design of perovskites are discussed on the basis of the redox mechanism governed by the redox properties. The strategies for catalyst design are (1) selection of B-site elements, which are usually transition metals; (2) valence control; and (3) synergistic effects of B-site elements and (4) enhancement of surface area by forming fine particles or dispersing on supports.

Heterogeneous Catalysis of Mixed Oxides

Heterogeneous Catalysis of Mixed Oxides
  • Author : Makoto Misono
  • Publisher :Unknown
  • Release Date :2013-02-28
  • Total pages :192
  • ISBN : 9780128081112
GET BOOK HERE

Summary : The chemistry and catalysis of solid heteropoly compounds are described. Heteropoly compounds are heteropolyanions and their derivatives that maintain the polyanion structure (metal oxide clusters), and catalysts of which the compounds are the essential components are called heteropoly catalyst. Heteropoly compounds are called polyoxometalates as well. First, the structure and chemical properties of heteropoly compounds are summarized, emphasizing the acidic and redox properties. The polyanion structure can be preserved in the solid state, if appropriate cautions are paid, and the acid and redox properties can be controlled in a wide range by choosing the polyanion structure and constituent elements. These are the remarkable advantages of the heteropoly catalysts. Then the catalysis and catalyst design of the heteropoly compounds are described in detail. There are actually several industrial processes using heteropoly catalysts as solid acids and oxidation catalysts. It is important to recognize the presence of hierarchical structures (primary, secondary, and tertiary structures) and three major types of catalysis (surface-type and two bulk-type catalyses). Due to this, catalyst design becomes more realistic and unique properties like shape-selective catalysis develop. Moreover, the dynamic behavior of protons and organic molecules can be elucidated by spectroscopic techniques.

Metal Oxides in Heterogeneous Catalysis

Metal Oxides in Heterogeneous Catalysis
  • Author : Jacques C. Vedrine
  • Publisher :Unknown
  • Release Date :2018-01-11
  • Total pages :618
  • ISBN : 9780128116326
GET BOOK HERE

Summary : Metal Oxides in Heterogeneous Catalysis is an overview of the past, present and future of heterogeneous catalysis using metal oxides catalysts. The book presents the historical, theoretical, and practical aspects of metal oxide-based heterogeneous catalysis. Metal Oxides in Heterogeneous Catalysis deals with fundamental information on heterogeneous catalysis, including reaction mechanisms and kinetics approaches.There is also a focus on the classification of metal oxides used as catalysts, preparation methods and touches on zeolites, mesoporous materials and Metal-organic frameworks (MOFs) in catalysis. It will touch on acid or base-type reactions, selective (partial) and total oxidation reactions, and enzymatic type reactions The book also touches heavily on the biomass applications of metal oxide catalysts and environmentally related/depollution reactions such as COVs elimination, DeNOx, and DeSOx. Finally, the book also deals with future trends and prospects in metal oxide-based heterogeneous catalysis. Presents case studies in each chapter that provide a focus on the industrial applications Includes fundamentals, key theories and practical applications of metal oxide-based heterogeneous catalysis in one comprehensive resource Edited, and contributed, by leading experts who provide perspectives on synthesis, characterization and applications

Perovskites and Related Mixed Oxides

Perovskites and Related Mixed Oxides
  • Author : Pascal Granger,Vasile I. Parvulescu,Serge Kaliaguine,Wilfrid Prellier
  • Publisher :Unknown
  • Release Date :2016-02-22
  • Total pages :944
  • ISBN : 9783527337637
GET BOOK HERE

Summary : This comprehensive handbook and ready reference details all the main achievements in the field of perovskite-based and related mixed-oxide materials. The authors discuss, in an unbiased manner, the potentials as well as the challenges related to their use, thus offering new perspectives for research and development on both an academic and industrial level. The first volume begins by summarizing the different synthesis routes from molten salts at high temperatures to colloidal crystal template methods, before going on to focus on the physical properties of the resulting materials and their related applications in the fields of electronics, energy harvesting, and storage as well as electromechanics and superconductivity. The second volume is dedicated to the catalytic applications of perovskites and related mixed oxides, including, but not limited to total oxidation of hydrocarbons, dry reforming of methane and denitrogenation. The concluding section deals with the development of chemical reactors and novel perovskite-based applications, such as fuel cells and high-performance ceramic membranes. Throughout, the contributions clearly point out the intimate links between structure, properties and applications of these materials, making this an invaluable tool for materials scientists and for catalytic and physical chemists.

Methane Combustion over Lanthanum-based Perovskite Mixed Oxides

Methane Combustion over Lanthanum-based Perovskite Mixed Oxides
  • Author : Hamidreza Arandiyan
  • Publisher :Unknown
  • Release Date :2016-10-29
  • Total pages :103
  • ISBN : 3662516667
GET BOOK HERE

Summary : This book presents current research into the catalytic combustion of methane using perovskite-type oxides (ABO3). Catalytic combustion has been developed as a method of promoting efficient combustion with minimum pollutant formation as compared to conventional catalytic combustion. Recent theoretical and experimental studies have recommended that noble metals supported on (ABO3) with well-ordered porous networks show promising redox properties. Three-dimensionally ordered macroporous (3DOM) materials with interpenetrated and regular mesoporous systems have recently triggered enormous research activity due to their high surface areas, large pore volumes, uniform pore sizes, low cost, environmental benignity, and good chemical stability. These are all highly relevant in terms of the utilization of natural gas in light of recent catalytic innovations and technological advances. The book is of interest to all researchers active in utilization of natural gas with novel catalysts. The research covered comes from the most important industries and research centers in the field. The book serves not only as a text for researcher into catalytic combustion of methane, 3DOM perovskite mixed oxide, but also explores the field of green technologies by experts in academia and industry. This book will appeal to those interested in research on the environmental impact of combustion, materials and catalysis.

Metal Oxide Catalysis, 2 Volume Set

Metal Oxide Catalysis, 2 Volume Set
  • Author : S. David Jackson,Justin S. J. Hargreaves
  • Publisher :Unknown
  • Release Date :2008-12-23
  • Total pages :887
  • ISBN : 9783527626120
GET BOOK HERE

Summary : With its two-volume structure, this handbook and ready reference allows for comprehensive coverage of both characterization and applications, while uniform editing throughout ensures that the structure remains consistent. The result is an up-to-date review of metal oxides in catalysis. The first volume covers a range of techniques that are used to characterize oxides, with each chapter written by an expert in the field. Volume 2 goes on to cover the use of metal oxides in catalytic reactions. For all chemists and engineers working in the field of heterogeneous catalysis.

Complex Catalytic Behaviors of CuTiOx Mixed-oxide During CO Oxidation

Complex Catalytic Behaviors of CuTiOx Mixed-oxide During CO Oxidation
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :2015
  • Total pages :7
  • ISBN : OCLC:960795800
GET BOOK HERE

Summary : Mixed metal oxides have attracted considerable attention in heterogeneous catalysis due to the unique stability, reactivity, and selectivity. Here, the activity and stability of the CuTiOx monolayer film supported on Cu(111), CuTiOx/Cu(111), during CO oxidation was explored using density functional theory (DFT). The unique structural frame of CuTiOx is able to stabilize and isolate a single Cu+ site on the terrace, which is previously proposed active for CO oxidation. Furthermore, it is not the case, where the reaction via both the Langmuir-Hinshelwood (LH) and the Mars-van Krevelen (M-vK) mechanisms are hindered on such single Cu+ site. Upon the formation of step-edges, the synergy among Cu[delta]+ sites, TiOx matrix, and Cu(111) is able to catalyze the reaction well. Depending on temperatures and partial pressure of CO and O2, the surface structure varies, which determines the dominant mechanism. In accordance with our results, the Cu[delta]+ ion alone does not work well for CO oxidation in the form of single sites, while the synergy among multiple active sites is necessary to facilitate the reaction.

Heterogeneous Catalytic Materials

Heterogeneous Catalytic Materials
  • Author : Guido Busca
  • Publisher :Unknown
  • Release Date :2014-05-23
  • Total pages :478
  • ISBN : 9780444595218
GET BOOK HERE

Summary : Heterogeneous Catalytic Materials discusses experimental methods and the latest developments in three areas of research: heterogeneous catalysis; surface chemistry; and the chemistry of catalysts. Catalytic materials are those solids that allow the chemical reaction to occur efficiently and cost-effectively. This book provides you with all necessary information to synthesize, characterize, and relate the properties of a catalyst to its behavior, enabling you to select the appropriate catalyst for the process and reactor system. Oxides (used both as catalysts and as supports for catalysts), mixed and complex oxides and salts, halides, sulfides, carbides, and unsupported and supported metals are all considered. The book encompasses applications in industrial chemistry, refinery, petrochemistry, biomass conversion, energy production, and environmental protection technologies. Provides a systematic and clear approach of the synthesis, solid state chemistry and surface chemistry of all solid state catalysts Covers widely used instrumental techniques for catalyst characterization, such as x-ray photoelectron spectroscopy, scanning electron microscopy, and more Includes characterization methods and lists all catalytic behavior of the solid state catalysts Discusses new developments in nanocatalysts and their advantages over conventional catalysts

How to Stabilize Highly Active Cu+ Cations in a Mixed-oxide Catalyst

How to Stabilize Highly Active Cu+ Cations in a Mixed-oxide Catalyst
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :2015
  • Total pages :7
  • ISBN : OCLC:960796004
GET BOOK HERE

Summary : Mixed-metal oxides exhibit novel properties that are not present in their isolated constituent metal oxides and play a significant role in heterogeneous catalysis. In this study, a titanium-copper mixed-oxide (TiCuOx) film has been synthesized on Cu(111) and characterized by complementary experimental and theoretical methods. At sub-monolayer coverages of titanium, a Cu2O-like phase coexists with TiCuOx and TiOx domains. When the mixed-oxide surface is exposed at elevated temperatures (600-650 K) to oxygen, the formation of a well-ordered TiCuOx film occurs. Stepwise oxidation of TiCuOx shows that the formation of the mixed-oxide is faster than that of pure Cu2O. As the Ti coverage increases, Ti-rich islands (TiOx) form. The adsorption of CO has been used to probe the exposed surface sites on the TiOx-CuOx system, indicating the existence of a new Cu+ adsorption site that is not present on Cu2O/Cu(111). Adsorption of CO on Cu+ sites of TiCuOx is thermally more stable than on Cu(111), Cu2O/Cu(111) or TiO2(110). The Cu+ sites in TiCuOx domains are stable under both reducing and oxidizing conditions whereas the Cu2O domains present on sub-monolayer loads of Ti can be reduced or oxidized under mild conditions. Furthermore, the results presented here demonstrate novel properties of TiCuOx films, which are not present on Cu(111), Cu2O/Cu(111), or TiO2(110), and highlight the importance of the preparation and characterization of well-defined mixed-metal oxides in order to understand fundamental processes that could guide the design of new materials.

Preparation of Catalysts VII

Preparation of Catalysts VII
  • Author : R. Maggi,J.A. Martens,G. Poncelet,P. Grange,P.A. Jacobs,B. Delmon
  • Publisher :Unknown
  • Release Date :1998-08-17
  • Total pages :986
  • ISBN : 0080539459
GET BOOK HERE

Summary : The proceedings of the VIIth International Symposium on the Scientific Bases for the Preparation of Heterogeneous Catalysts, are in line with the general scope of this series of events. Emphasis in all Symposia has been on the scientific aspects of the preparation of new and industrial catalysts, or on new methods of preparation, rather than on the catalytic reactions in which such solids are ultimately used. In the present context, the catalytic event itself has only been considered as another, though often decisive, method of catalyst characterization.

Mixed Oxides of Ca, Mg, and Zn as Heterogeneous Base Catalysts for Transesterification of Palm Kernel Oil

Mixed Oxides of Ca, Mg, and Zn as Heterogeneous Base Catalysts for Transesterification of Palm Kernel Oil
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :2009
  • Total pages :212
  • ISBN : OCLC:921499622
GET BOOK HERE

Summary :

Scientific Bases for the Preparation of Heterogeneous Catalysts

Scientific Bases for the Preparation of Heterogeneous Catalysts
  • Author : E. Gaigneaux,M Devillers,S. Hermans,P.A. Jacobs,J. Martens,P. Ruiz
  • Publisher :Unknown
  • Release Date :2010-06-29
  • Total pages :880
  • ISBN : 0444536027
GET BOOK HERE

Summary : These meetings, held every four years, bring together researchers from academia and industry and offer a forum for discussions on the chemistry involved in the preparation of industrial heterogeneous catalysts. Contributions focus on the aspects of catalyst preparation. Reports on physico-chemical characteristics of catalysts and catalytic performances are limited to correlations with the preparation parameters. Contains a collection of the papers presented at the workshop

Heterogeneous Catalysis and its Industrial Applications

Heterogeneous Catalysis and its Industrial Applications
  • Author : Martin Schmal
  • Publisher :Unknown
  • Release Date :2016-09-22
  • Total pages :373
  • ISBN : 9783319092508
GET BOOK HERE

Summary : This book aims to introduce the basic concepts involved in industrial catalytic processes. It is profusely illustrated with experimental results with the main objective of guiding how to select a suitable catalyst for specific processes. The book is divided in two parts. In the first part the basic concepts are addressed, regarding the existing theories, activity patterns and adsorption-desorption phenomena. In the second part the key experimental methods for the physicochemical characterization of catalysts are presented, as well as the currently used catalyst pre and post treatments. The last chapter describes some important in situ characterization techniques (e.g. XPS and TEM) and surface model patterns related to surface modifications occurring during the reaction. Thoroughly illustrated with microscopy images, spectroscopy data and schematics of reaction mechanisms, the book provides a powerful learning tool for students in undergraduate and graduate level courses on the field of catalysis. Exercises and resolved problems are provided, as well as experimental procedures to support laboratory classes. Furthermore, the content is presented in a carefully chosen sequence, reflecting the 30 year teaching experience of the author. The author, Professor Martin Schmal, sees the present book as a way of conveying basic knowledge needed for the development of more efficient catalysts (i.e. nanostructured materials) and novel industrial chemical processes in the fields of environmental chemistry, fine chemistry, hydrotreating of heavy oils, hydrogen production and biomass processing.

Catalysis by Ceria and Related Materials

Catalysis by Ceria and Related Materials
  • Author : Alessandro Trovarelli,Paolo Fornasiero
  • Publisher :Unknown
  • Release Date :2013-04-30
  • Total pages :908
  • ISBN : 9781848169654
GET BOOK HERE

Summary : This book follows the 2002 edition of Catalysis by Ceria and Related Materials, which was the first book entirely devoted to ceria and its catalytic properties. In the ten years since the first edition a massive amount of work has been carried out in the field, and ceria has gained a prominent position in catalysis as one of the most valuable material for several applications. This second edition covers fundamental and applied aspects of the latest advances in ceria-based materials with a special focus on structural, redox and catalytic features. Special emphasis is given to nano-engineered and nano-shaped systems which are a key factor in the predictive and rational design of ceria with novel properties. In addition, the book presents recent advances in emerging and traditional large-scale applications of ceria in catalysis, such as the treatment of emissions from mobile sources (including diesel and gasoline engines). The primary readership includes catalysis and material science researchers from academy and industry and postdoctorate and graduate students in chemistry, chemical engineering and physics. Contents:Crystal and Electronic Structures, Structural Disorder, Phase Transformation, and Phase Diagram of Ceria–Zirconia and Ceria-Based Materials (Masatomo Yashima)Understanding Ceria-Based Catalytic Materials: An Overview of Recent Progress (Juan José Delgado, Eloy del Río, Xiaowei Chen, Ginesa Blanco, José María Pintado, Serafín Bernal and José Juan Calvino)Investigation of the Oxygen Storage and Release Kinetics of Model and Commercial Three-Way Catalytic Materials by Transient Techniques (Angelos M Efstathiou and Stavroula Y Christou)Interaction of Nitrogen Oxides with Ceria-Based Materials (Avelina García-García and Agustin Bueno-López)Atomistic Modelling of Ceria Nanostructures: Introducing Structural Complexity (Dean C Sayle and Thi X T Sayle)Two-Dimensional and Three-Dimensional Ceria-Based Nanoarchitectures (Zhen-Xing Li, Wei Feng, Chao Zhang, Ling-Dong Sun, Ya-Wen Zhang and Chun-Hua Yan)Core-Shell-Type Materials Based on Ceria (Matteo Cargnello, Raymond J Gorte and Paolo Fornasiero)New Developments in Ceria-Based Mixed Oxide Synthesis and Reactivity in Combustion and Oxidation Reactions (Benjaram M Reddy, Thallada Vinod Kumar and Naga Durgasri)Design and Modeling of Active Sites in Metal–Ceria Catalysts for the Water Gas Shift Reaction and Related Chemical Processes (Jose A Rodriguez)Ceria-Based Gold Catalysts: Synthesis, Properties, and Catalytic Performance for the WGS and PROX Processes (Donka Andreeva, Tatyana Tabakova and Lyuba Ilieva)Ceria-Based Formulations for Catalysts for Diesel Soot Combustion (Eleonora Aneggi, Carla de Leitenburg and Alessandro Trovarelli)Ceria and Its Use in Solid Oxide Cells and Oxygen Membranes (Christodoulos Chatzichristodoulou, Peter T Blennow, Martin Søgaard, Peter V Hendriksen and Mogens B Mogensen)Transformation of Oxygenated Compounds Derived from Biomass into Valuable Chemicals Using Ceria-Based Solid Catalysts (Laurence Vivier and Daniel Duprez)Ceria-Based Catalysts for Air Pollution Abatement (Anna Maria Venezia, Leonarda Francesca Liotta, Giuseppe Pantaleo and Alessandro Longo) Readership: Graduate students and researchers in the fields of chemistry, physics, materials science and chemical engineering. Keywords:Ceria;Catalysis;Nanomaterials;Exhaust Gas TreatmentKey Features:New edition with additional chaptersUnique collection of reviews on a specific topic from a wide perspectiveDistinguished contributors from the field

Synthesis and Characterization of Support-modified Nanoparticle-based Catalysts and Mixed Oxide Catalysts for Low Temperature CO Oxidation

Synthesis and Characterization of Support-modified Nanoparticle-based Catalysts and Mixed Oxide Catalysts for Low Temperature CO Oxidation
  • Author : Andrew Justin Binder
  • Publisher :Unknown
  • Release Date :2015
  • Total pages :156
  • ISBN : OCLC:1041854903
GET BOOK HERE

Summary : Heterogeneous catalysts are responsible for billions of dollars of industrial output and have a profound, if often understated, effect on our everyday lives. New catalyst technologies and methods to enhance existing catalysts are essential to meeting consumer demands and overcoming environmental concerns. This dissertation focuses on the development of catalysts for low temperature carbon monoxide oxidation. CO [carbon monoxide] oxidation is often used as a probe reaction to test overall oxidation activity of a given catalyst and is an important reaction in the elimination of toxic pollutants from automotive exhaust streams. The work included here presents three new heterogeneous catalysts developed over the last 4 years in our group. The first type Au/SiO2 [gold/silica] catalyst synthesized using a new method for the deposition of Au nanoparticles onto SiO2 via a nitrogen-containing polymer, C3N4 [carbon nitride]. C3N4-modification of SiO2 allows us to ignore unfavorable electrostatic effects that hinder standard Au deposition onto this support. While removal of the C3N4 is necessary for good CO oxidation, this new method is an improvement over the standard deposition-precipitation procedure for supports with low isoelectric point that enables the successful deposition of Au nanoparticles onto SiO2. The second type includes precious metal catalysts deposited on an “inert” silica support but promoted by the addition of an “active” metal oxide. Here we present a Au/FeOx̳/SiO2 [gold/iron oxide/silica] and a Pd/ZrO2/SiO2 [palladium/zirconia/silica] catalyst which show increased activity and stability effects due to the presence of the metal oxide promoter. They are synthesized by a C3N4-deposition and sol-gel methods, respectively. These catalysts were also tested in simulated automotive exhaust streams. The results show that inhibition effects play a major role in the activity of these catalysts. The third type of catalyst is a mixed oxide catalyst, CuO-Co3O4-CeO2 [copper oxide-cobalt oxide-cerium oxide], developed with the goal of overcoming the inhibition effects seen in the previous precious metal catalysts. The catalyst was synthesized by co-precipitation method and shows exceptional activity for CO oxidation under simulated exhaust conditions. Also noteworthy is the observation that this catalyst also shows a lack of inhibition by a common exhaust component, propene.

Heterogeneous Catalysts

Heterogeneous Catalysts
  • Author : Wey Yang Teoh,Atsushi Urakawa,Yun Hau Ng,Patrick Sit
  • Publisher :Unknown
  • Release Date :2021-06-08
  • Total pages :768
  • ISBN : 9783527344154
GET BOOK HERE

Summary : Presents state-of-the-art knowledge of heterogeneous catalysts including new applications in energy and environmental fields This book focuses on emerging techniques in heterogeneous catalysis, from new methodology for catalysts design and synthesis, surface studies and operando spectroscopies, ab initio techniques, to critical catalytic systems as relevant to energy and the environment. It provides the vision of addressing the foreseeable knowledge gap unfilled by classical knowledge in the field. Heterogeneous Catalysts: Advanced Design, Characterization and Applications begins with an overview on the evolution in catalysts synthesis and introduces readers to facets engineering on catalysts; electrochemical synthesis of nanostructured catalytic thin films; and bandgap engineering of semiconductor photocatalysts. Next, it examines how we are gaining a more precise understanding of catalytic events and materials under working conditions. It covers bridging pressure gap in surface catalytic studies; tomography in catalysts design; and resolving catalyst performance at nanoscale via fluorescence microscopy. Quantum approaches to predicting molecular reactions on catalytic surfaces follows that, along with chapters on Density Functional Theory in heterogeneous catalysis; first principles simulation of electrified interfaces in electrochemistry; and high-throughput computational design of novel catalytic materials. The book also discusses embracing the energy and environmental challenges of the 21st century through heterogeneous catalysis and much more. Presents recent developments in heterogeneous catalysis with emphasis on new fundamentals and emerging techniques Offers a comprehensive look at the important aspects of heterogeneous catalysis Provides an applications-oriented, bottoms-up approach to a high-interest subject that plays a vital role in industry and is widely applied in areas related to energy and environment Heterogeneous Catalysts: Advanced Design, Characterization and Applications is an important book for catalytic chemists, materials scientists, surface chemists, physical chemists, inorganic chemists, chemical engineers, and other professionals working in the chemical industry.

Photo-degradation of Caffeine in Aqueous System Using Heterogeneous Mixed Oxide Catalysts

Photo-degradation of Caffeine in Aqueous System Using Heterogeneous Mixed Oxide Catalysts
  • Author : Vuyolwethu Owethu Ndabankulu
  • Publisher :Unknown
  • Release Date :2017
  • Total pages :229
  • ISBN : OCLC:1193165397
GET BOOK HERE

Summary :