Download or read book Ligand Participation in Energy Storage Electrocatalysis and Photocatalysis written by Andrew Gerard Maher and published by . This book was released on 2018 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: The electrochemical or photochemical production of fuels using energy from the sun is an attractive approach for storing solar energy. However, the development of efficient and inexpensive catalysts is necessary to facilitate these reactions. While a number of molecular catalysts do exist for this purpose, a lack of deep understanding of how they operate on a mechanistic level impedes their optimization and rational design. This thesis addresses the key mechanistic issue of ligand participation during energy storage catalysis using electrochemical, spectroscopic (both steady-state and time-resolved), synthetic, and computational techniques. The thesis begins by investigating the reactivity of nickel porphyrins during the electrocatalytic generation of hydrogen from acid. Rather than forming a traditional metal-hydride intermediate, nickel porphyrins are found to be protonated on the macrocycle ligand to first form a phlorin intermediate and ultimately a doubly-hydrogenated isobacteriochlorin species. The Ni isobacteriochlorin serves as the active hydrogen evolution catalyst, with ring reduction of the ligand necessary to drive metal-hydride formation. A synthetic cobalt chlorin in which the ring reduction is structurally enforced is then investigated. The cobalt chlorin also generates hydrogen electrochemically, and a mechanistic study reveals a greater intrinsic activity than metal porphyrins when compared at low overpotentials, likely due to an increased hydricity imparted by the highly-reduced ligand. The thesis then turns to the role of direct ligand reactivity in enhancing the photoreactivity of monomeric nickel complexes. Transient absorption (TA) spectroscopic studies reveal that the triphenylphosphine ligand of Ni halide hydrogen-evolving photocatalysts serves as the photosensitizer and as a redox mediator in what is determined to be a tandem cycle. TA also demonstrates the role of halogen-arene charge transfer intermediates in increasing the quantum yield of halogen photoelimination by Ni(III) trichloride complexes containing bidendate phosphine ligands that include aryl groups. The thesis concludes with an examination of the electron transfer kinetics of a soluble form of peroxide dianion stabilized by a hydrogen-bonding cryptand ligand. Ultrafast oxidation of the peroxide using photosensitizers of varying oxidizing power allows for measurement of the inner-sphere reorganization energy, which is dominated by the contraction of the O-O bond.
Download or read book Photoelectrocatalysis written by Leonardo Palmisano and published by Elsevier. This book was released on 2022-10-21 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photoelectrocatalysis: Fundamentals and Applications presents an in-depth review of the topic for students and researchersworking on photoelectrocatalysis-related subjects from pure chemistry to materials and environmental chemistry inorder to propose applications and new perspectives. The main advantage of a photoelectrocatalytic process is the mildexperimental conditions under which the reactions are carried out, which are often possible at atmospheric pressure androom temperature using cheap and nontoxic solvents (e.g., water), oxidants (e.g., O2 from the air), catalytic materials (e.g.,TiO2 on Ti layer), and the potential exploitation of solar light. This book presents the fundamentals and the applications of photoelectrocatalysis, such as hydrogen production fromwater splitting, the remediation of harmful compounds, and CO2 reduction. Photoelectrocatalytic reactors and lightsources, in addition to kinetic aspects, are presented along with an exploration of the relationship between photocatalysisand electrocatalysis. In addition, photocorrosion issues and the application of selective photoelectrocatalytic organictransformations, which is now a growing field of research, are also reported. Finally, the advantages/disadvantages andfuture perspectives of photoelectrocatalysis are highlighted through the possibility of working at a pilot/industrial scale inenvironmentally friendly conditions. Presents the fundamentals of photoelectrocatalysis Outlines photoelectrocatalytic green chemistry Reviews photoelectrocatalytic remediation of harmful compounds, hydrogen production, and CO2 reduction Includes photocorrosion, photoelectrocatalytic reactors, and modeling along with kinetic aspects
Download or read book Encyclopedia of Interfacial Chemistry written by and published by Elsevier. This book was released on 2018-03-29 with total page 5276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encyclopedia of Interfacial Chemistry: Surface Science and Electrochemistry, Seven Volume Set summarizes current, fundamental knowledge of interfacial chemistry, bringing readers the latest developments in the field. As the chemical and physical properties and processes at solid and liquid interfaces are the scientific basis of so many technologies which enhance our lives and create new opportunities, its important to highlight how these technologies enable the design and optimization of functional materials for heterogeneous and electro-catalysts in food production, pollution control, energy conversion and storage, medical applications requiring biocompatibility, drug delivery, and more. This book provides an interdisciplinary view that lies at the intersection of these fields. Presents fundamental knowledge of interfacial chemistry, surface science and electrochemistry and provides cutting-edge research from academics and practitioners across various fields and global regions
Download or read book In situ Spectroscopic Studies of Adsorption at the Electrode and Electrocatalysis written by Shi-Gang Sun and published by Elsevier. This book was released on 2011-08-11 with total page 559 pages. Available in PDF, EPUB and Kindle. Book excerpt: In-Situ Spectroscopic Studies of Adsorption at the Electrode and Electrocatalysis is a new reference on in-situ spectroscopic techniques/applications, fundamentals of electrocatalysis at molecule level, and progresses within electrochemical surface science. Presenting both essential background knowledge at graduate level and original research within the fields of spectroscopy, electrochemistry, and surface science. Featuring 15 chapters by prominent worldwide scholars, based on their recent progress in different aspects of in-situ spectroscopy studies, this book will appeal to a wide audience of scientists. In summary this book is highly suitable for graduates learning basic concepts and advanced applications of in-situ spectroscopy, electrocatalysis and electrode adsorptions. * Written by the most active scientists in the fields of spectroscopy, electrochemistry and surface science* Essential background knowledge for graduate students* A modern reference of cutting-edge scientific research
Download or read book Graphene Surfaces written by Karim Kakaei and published by Academic Press. This book was released on 2018-10-09 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graphene Surfaces: Particles and Catalysts focuses on the surface chemistry and modification of graphene and its derivatives from a theoretical and electrochemical point-of-view. It provides a comprehensive overview of their electronic structure, synthesis, properties and general applications in catalysis science, including their relevance in alcohols and their derivatives oxidation, oxygen reduction, hydrogen evolution, energy storage, corrosion protection and supercapacitors. The book also covers emerging research on graphene chemistry and its impact. Chemical engineers, materials scientists, electrochemists and engineers will find information that will answer their most pressing questions on the surface aspects of graphene and its effect on catalysis. Serves as a time-saving reference for researchers, graduated students and chemical engineers Equips the reader with catalysis knowledge for practical applications Discusses the physical and electrochemical properties of graphene Provides the most important applications of graphene in electrochemical systems Highlights both experimental and theoretical aspects of graphene
Download or read book Photophysics Photochemical and Substitution Reactions written by Satyen Saha and published by BoD – Books on Demand. This book was released on 2021-06-30 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book represents a unique blend of topics covering photon-initiated reactions to substitution reactions. Additionally, several fantastic chapters on the photophysics of popular dyes and their applications make the book interesting for researchers working on photon-initiated physical and chemical processes.
Download or read book Solar to Chemical Energy Conversion written by Masakazu Sugiyama and published by Springer. This book was released on 2016-01-25 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explains the conversion of solar energy to chemical energy and its storage. It covers the basic background; interface modeling at the reacting surface; energy conversion with chemical, electrochemical and photoelectrochemical approaches and energy conversion using applied photosynthesis. The important concepts for converting solar to chemical energy are based on an understanding of the reactions’ equilibrium and non-equilibrium conditions. Since the energy conversion is essentially the transfer of free energy, the process are explained in the context of thermodynamics.
Download or read book Advanced Catalytic Materials written by Noreña Luis and published by BoD – Books on Demand. This book was released on 2016-02-03 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Todays chemical industry processes worldwide largely depend on catalytic reactions and the desirable future evolution of this industry toward more selective products, more environmentally friendly products, more energy-efficient processes, a smaller use of hazardous reagents, and a better use of raw materials also largely involves the development of better catalysts and, specifically, purposely designed catalytic materials. The careful study and development of the new-generation catalysts involve relatively large groups of specialists in universities, research centers, and industries, joining forces from different scientific and technical disciplines. This book has put together recent, state-of-the-art topics on current trends in catalytic materials and consists of 16 chapters.
Download or read book Homogeneous Photocatalysis written by M. Chanon and published by John Wiley & Sons. This book was released on 1997-03-06 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photocatalysis and related processes occupy a strategic position for the future of photochemistry. This volume provides an introduction to basic concepts and explains how applications work at the molecular level.
Download or read book Lignin Valorization written by Gregg T. Beckham and published by Royal Society of Chemistry. This book was released on 2018-03-29 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Chapters will specifically focus on the production of fuels and chemicals from lignin."--Page [4] of cover.
Download or read book Nanocarbon Electrochemistry written by Nianjun Yang and published by John Wiley & Sons. This book was released on 2019-11-14 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a comprehensive introduction to the field of nanocarbon electrochemistry The discoveries of new carbon materials such as fullerene, graphene, carbon nanotubes, graphene nanoribbon, carbon dots, and graphdiyne have triggered numerous research advances in the field of electrochemistry. This book brings together up-to-date accounts of the recent progress, developments, and achievements in the electrochemistry of different carbon materials, focusing on their unique properties and various applications. Nanocarbon Electrochemistry begins by looking at the studies of heterogeneous electron transfer at various carbon electrodes when redox-active molecules are reversibly and specifically adsorbed on the carbon electrode surface. It then covers electrochemical energy storage applications of various carbon materials, particularly the construction and performance of supercapacitors and batteries by use of graphene and related materials. Next, it concentrates on electrochemical energy conversion applications where electrocatalysis at 0D, 1D, 2D, and 3D carbon materials nanocarbon materials is highlighted. The book finishes with an examination of the contents of electrogenerated chemiluminescence and photoelectrochemical pollutant degradation by use of diamond and related carbon materials. Covers the fundamental properties of different carbon materials and their applications across a wide range of areas Provides sufficient background regarding different applications, which contributes to the understanding of specialists and non-specialists Examines nanoelectrochemistry of adsorption-coupled electron transfer at carbon electrodes; graphene and graphene related materials; diamond electrodes for the electrogenerated chemiluminescence; and more Features contributions from an international team of distinguished researchers Nanocarbon Electrochemistry is an ideal book for students, researchers, and industrial partners working on many diverse fields of electrochemistry, whether they already make frequent use of carbon electrodes in one form of another or are looking at electrodes for new applications.
Download or read book Encyclopedia of Electrochemical Power Sources written by Jürgen Garche and published by Newnes. This book was released on 2013-05-20 with total page 4532 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of Electrochemical Power Sources is a truly interdisciplinary reference for those working with batteries, fuel cells, electrolyzers, supercapacitors, and photo-electrochemical cells. With a focus on the environmental and economic impact of electrochemical power sources, this five-volume work consolidates coverage of the field and serves as an entry point to the literature for professionals and students alike. Covers the main types of power sources, including their operating principles, systems, materials, and applications Serves as a primary source of information for electrochemists, materials scientists, energy technologists, and engineers Incorporates nearly 350 articles, with timely coverage of such topics as environmental and sustainability considerations
Download or read book Oxygen Reduction Reaction written by Kushal Sengupta and published by Elsevier. This book was released on 2022-06-14 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxygen Reduction Reaction: Fundamentals, Materials and Applications covers the design, synthesis and performance efficacies of the entire spectrum of oxygen reduction catalysts, extrapolating down to their applications in practical, alternative, renewable energy devices. Catalysts covered include heme inspired iron-based, heme inspired non-iron-based, non-heme-based, noble metal-based, non-noble metal-based and metal-free homogeneous and heterogeneous catalysts. The book contains critical analyses and opinions from experts around the world, making it of interest to scientists, engineers, industrialists, entrepreneurs and students. Discusses the fundamental aspects of oxygen reduction reactions Offers a comprehensive analysis of the choice and development of catalyst materials for oxygen reduction reaction Reviews emerging catalyst systems for oxygen reduction reaction Includes analyses of catalytic performance parameters to evaluate their efficacy in oxygen reduction reactions under varied operating conditions Covers the importance of oxygen reduction reaction catalysts and processes in real-life applications
Download or read book Methods for Electrocatalysis written by Inamuddin and published by Springer Nature. This book was released on 2020-01-02 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores key parameters, properties and fundamental concepts of electrocatalysis. It also discusses the engineering strategies, current applications in fuel-cells, water-splitting, metal-ion batteries, and fuel generation. This book elucidates entire category viewpoints together with industrial applications. Therefore, all the sections of this book emphasize the recent advances of different types of electrocatalysts, current challenges, and state-of-the-art studies through detailed reviews. This book is the result of commitments by numerous experts in the field from various backgrounds and expertise and appeals to industrialists, researchers, scientists and in addition understudies from various teaches.
Download or read book Sustainable Ammonia Production written by Inamuddin and published by Springer Nature. This book was released on 2020-01-09 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents sustainable synthetic pathways and modern applications of ammonia. It focuses on the production of ammonia using various catalytic systems and its use in fuel cells, membrane, agriculture, and renewable energy sectors. The book highlights the history, investigation, and development of sustainable pathways for ammonia production, current challenges, and state-of-the-art reviews. While discussing industrial applications, it fills the gap between laboratory research and viable applications in large-scale production.
Download or read book Metal Oxides in Heterogeneous Catalysis written by Jacques C. Vedrine and published by Elsevier. This book was released on 2018-01-11 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Modern Aspects of Electrochemistry 42 written by Constantinos G. Vayenas and published by Springer Science & Business Media. This book was released on 2008-03-08 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume analyzes and summarizes recent developments in several key interfacial electrochemical systems in the areas of fuel cell electrocatatalysis, electrosynthesis and electrodeposition. The six Chapters are written by internationally recognized experts in these areas and address both fundamental and practical aspects of several existing or emerging key electrochemical technologies. The Chapter by R. Adzic, N. Marinkovic and M. Vukmirovic provides a lucid and authoritative treatment of the electrochemistry and electrocatalysis of Ruthenium, a key element for the devel- ment of efficient electrodes for polymer electrolyte (PEM) fuel cells. Starting from fundamental surface science studies and interfacial considerations, this up-to-date review by some of the pioneers in this field, provides a deep insight in the complex catalytic-electrocatalytic phenomena occurring at the interfaces of PEM fuel cell electrodes and a comprehensive treatment of recent developments in this extremely important field. Several recent breakthroughs in the design of solid oxide fuel cell (SOFC) anodes and cathodes are described in the Chapter of H. Uchida and M. Watanabe. The authors, who have pioneered several of these developments, provide a lucid presentation d- cribing how careful fundamental investigations of interfacial electrocatalytic anode and cathode phenomena lead to novel electrode compositions and microstructures and to significant practical advances of SOFC anode and cathode stability and enhanced electrocatalysis.
