Molecular Water Oxidation Catalysts Based on Copper and Nickel Complexes PDF Download
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Author: Pablo Garrido Barros
Publisher:
ISBN:
Category :
Languages : en
Pages : 478
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Book Description
Author: Pablo Garrido Barros
Publisher:
ISBN:
Category :
Languages : en
Pages : 478
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Book Description
Author: Antoni Llobet
Publisher: John Wiley & Sons
ISBN: 1118698622
Category : Technology & Engineering
Languages : en
Pages : 343
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Book Description
Photocatalytic water splitting is a promising strategy for capturing energy from the sun by coupling light harvesting and the oxidation of water, in order to create clean hydrogen fuel. Thus a deep knowledge of the water oxidation catalysis field is essential to be able to come up with useful energy conversion devices based on sunlight and water splitting. Molecular Water Oxidation Catalysis: A Key Topic for New Sustainable Energy Conversion Schemes presents a comprehensive and state-of-the-art overview of water oxidation catalysis in homogeneous phase, describing in detail the most important catalysts discovered today based on first and second row transition metals. A strong emphasis is placed on the description of their performance, as well as how they work from a mechanistic perspective. In addition, a theoretical description of some of the most relevant catalysts based on DFT are presented, as well as a description of related natural systems, such as the oxygen evolving system of photosystem II and the heme chlorite-dismutase. This book is a valuable resource for researchers working on water oxidation catalysis, solar energy conversion and artificial photosynthesis, as well as for chemists and materials scientists with a broad interest in new sustainable energy conversion schemes.
Author: Shoshanna Barnett
Publisher:
ISBN:
Category : Copper catalysts
Languages : en
Pages : 115
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Book Description
Water oxidation is a challenging reaction that has great importance for alternative energy and fuel generation. Although several water oxidation catalysts have been discovered, much improvement is needed for the technology to be viable on a global scale. In recent years, there has been focus in the development of catalysts with earth-abundant elements and, subsequently, cobalt, nickel, manganese, and iron catalysts have been reported. This dissertation discusses the discovery and study of the first reported copper-based water oxidation electrocatalyst. This catalyst is a molecular species with bipyridine and hydroxide ligands. Study of this catalyst has shown that it is among the fastest homogeneous water oxidation catalysts yet reported, with a turnover frequency of ~100 s-1. The catalyst is also relatively robust and can undergo at least 30 turnovers. Solutions of the catalyst are generated easily by reaction of bipyridine and a copper salt in a 1:1 ratio in water, followed by addition of hydroxide to obtain a solution between pH 11 and 13. The catalytic mechanism has been investigated through spectroscopic analysis to understand the speciation, electrochemical kinetics, a ligand study, and reactivity studies. While further work is still needed, these investigations have laid the groundwork for a basic understanding of the mechanism. A phenanthroline-based catalyst has also been successfully immobilized on a pyrolytic graphite electrode through physisorption. The heterogeneous catalyst shows remarkable similarities to its homogeneous counterpart. It operates at the same overpotential and activity level and displays similar pH dependent behavior. This system has important implications for catalyst immobilization in general, which is an important area of study for the development of more industrially relevant catalysts.
Author:
Publisher: Academic Press
ISBN: 0128160837
Category : Science
Languages : en
Pages : 380
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Book Description
Water Oxidation Catalysts, Volume 74, the latest release in the Advances in Inorganic Chemistry series, presents timely and informative summaries on current progress in a variety of subject areas. This acclaimed serial features reviews written by experts in the field, serving as an indispensable reference to advanced researchers. Users will find this to be a comprehensive overview of recent findings and trends from the last decade that covers various kinds of inorganic topics, ranging from theoretical oriented supramolecular chemistry, to the quest for accurate calculations of spin states in transition metals. Provides the authority and expertise of leading contributors from an international board of authors Presents the latest release in the Advances in Inorganic Chemistry series Includes the latest information on water oxidation catalysts
Author: Ivano Bertini
Publisher: University Science Books
ISBN: 9781891389436
Category : Science
Languages : en
Pages : 794
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Book Description
Part A.: Overviews of biological inorganic chemistry : 1. Bioinorganic chemistry and the biogeochemical cycles -- 2. Metal ions and proteins: binding, stability, and folding -- 3. Special cofactors and metal clusters -- 4. Transport and storage of metal ions in biology -- 5. Biominerals and biomineralization -- 6. Metals in medicine. -- Part B.: Metal ion containing biological systems : 1. Metal ion transport and storage -- 2. Hydrolytic chemistry -- 3. Electron transfer, respiration, and photosynthesis -- 4. Oxygen metabolism -- 5. Hydrogen, carbon, and sulfur metabolism -- 6. Metalloenzymes with radical intermediates -- 7. Metal ion receptors and signaling. -- Cell biology, biochemistry, and evolution: Tutorial I. -- Fundamentals of coordination chemistry: Tutorial II.
Author: Robertus J. M. Klein Gebbink
Publisher: John Wiley & Sons
ISBN: 3527340610
Category : Technology & Engineering
Languages : en
Pages : 610
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Book Description
An expert overview of current research, applications, and economic and environmental advantages The study and development of new homogeneous catalysts based on first-row metals (Mn, Fe, Co, Ni, and Cu) has grown significantly due to the economic and environmental advantages that non-noble metals present. Base metals offer reduced cost, greater supply, and lower toxicity levels than noble metals?enabling greater opportunity for scientific investigation and increased development of practical applications. Non-Noble Metal Catalysis provides an authoritative survey of the field, from fundamental concepts and computational methods to industrial applications and reaction classes. Recognized experts in organometallic chemistry and homogeneous catalysis, the authors present a comprehensive overview of the conceptual and practical aspects of non-noble metal catalysts. Examination of topics including non-innocent ligands, proton-coupled electron transfer, and multi-nuclear complexes provide essential background information, while areas such as kinetic lability and lifetimes of intermediates reflect current research and shifting trends in the field. This timely book demonstrates the efficacy of base metal catalysts in the pharmaceutical, fine-chemical, and agrochemical industries, addressing both environmental and economic concerns. Providing essential conceptual and practical exploration, this valuable resource: -Illustrates how unravelling new reactivity patterns can lead to new catalysts and new applications -Highlights the multiple advantages of using non-noble metals in homogenous catalysis -Demonstrates how the availability of non-noble metal catalysis reduces costs and leads to immense savings for the chemical industry -Reveals how non-noble metal catalysis are more sustainable than noble metals such as palladium or platinum Non-Noble Metal Catalysis: Molecular Approaches and Reactions is an indispensable source of up-to-date information for catalytic chemists, organic chemists, industrial chemists, organometallic chemists, and those seeking to broaden their knowledge of catalytic chemistry.
Author: Jayneil Kamdar
Publisher:
ISBN:
Category :
Languages : en
Pages : 212
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Book Description
Global concern about the long-term sustainability and environmental impact of burning fossil fuels has prompted widespread research on alternative fuels. Hydrogen is attractive as a chemical fuel because it is carbon-free and therefore its exothermic reaction with oxygen does not generate CO2 as a byproduct. Large scale implementation of hydrogen, however, depends on efficient and clean production of hydrogen from non-fossil sources. Splitting water with sunlight is often considered the "Holy Grail" of a sustainable hydrogen economy, however the greatest challenge towards achieving this goal is in lowering the high kinetic barrier of the water oxidation half reaction. With the right electronics and geometry of coordinated ligands, transition metals can effectively mediate the loss of 4 e- / 4 H+ required to oxidize water. This dissertation details the syntheses, characterization, and reactivities of three novel catalytic systems containing multi-functional ligands that appear to have a marked effect on catalysis. Chapter 2 details the synthesis and reactivity of novel ruthenium complexes bearing 2,2'-bipyridine ligands with various pyrazolate groups in the 6,6'-positions. The structures of these complexes were characterized by NMR spectroscopy and x-ray crystallography and for one of the complexes, the unique solvatochromic and acid-base properties involving the uncoordinated nitrogen atoms of the ligand were investigated by non-aqueous and aqueous UV-visible spectroscopy and electrochemistry. Rapid O2 evolution was witnessed under acidic conditions in the presence of CeIV. While the apparent rates (between 3 and 4 s-1) are in the upper range of rates observed for ruthenium-based molecular catalysts, lag periods observed for 1-1.5 min prior to O2 production may be indications of slow catalyst dissolution or activation, or of catalyst modification. Alternatively, CeIV may have a non-innocent role during catalysis by interaction with the uncoordinated nitrogen. Chapter 3 details the synthesis and catalysis-relevant properties of two novel ruthenium complexes, [Ru(2,2'-bipyridine-6,6'-diphosphonato)(pic)2] (pic=4-picoline) and [Ru(6,6'-diisopropyl-2,2'-bipyridine-6,6'-diphosphonato)(pic)2]. These complexes are the first examples of water oxidation catalysts deliberately bearing phosphonate groups positioned to serve as metal-bound ligands. They have been characterized by NMR spectroscopy, elemental analyses, x-ray crystallography, cyclic voltammetry, and UV-visible spectroscopy. From electrochemical data, we have discovered that charge states of P-OH / P-OR groups have a significant influence on redox and catalytic properties, features that are absent in much more commonly studied carboxylate analogs. Chapter 4 details the synthesis and reactivity of a series of ruthenium complexes bearing novel 2,2'-biimidazole-4,4'-phosphonate ligands. Surprisingly, the new ligands did not participate in the intended tetradentate coordination, but instead bidentate N,N'-coordination, placing the phosphonate groups in the secondary coordination sphere to engage in hydrogen bonding interactions with two aquo ligands. The presented complexes have been characterized by NMR spectroscopy, x-ray crystallography, and cyclic voltammetry. Qualitative and quantitative oxygen evolution studies (from cyclic voltammetry and addition of excess CeIV, respectively) have shown a dramatic improvement in catalytic rates compared to those of previously reported Ru diaquo complexes. Our working hypothesis to explain the superior catalytic activity includes involvement of the phosphonates in the secondary coordination sphere potentially as basic proton-relaying functionalities.
Author: Boy Cornils
Publisher: John Wiley & Sons
ISBN: 3527651764
Category : Science
Languages : en
Pages : 1770
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Book Description
The completely revised third edition of this four-volume classic is fully updated and now includes such topics as as CH-activation and multicomponent reactions. It describes the most important reaction types, new methods and recent developments in catalysis. The internationally renowned editors and a plethora of international authors (including Nobel laureate R. Noyori) guarantee high quality content throughout the book. A "must read" for everyone in academia and industry working in this field.
Author: Jens Hagen
Publisher: John Wiley & Sons
ISBN: 3527331654
Category : Technology & Engineering
Languages : en
Pages : 546
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Book Description
Now in it's 3rd Edition, Industrial Catalysis offers all relevant information on catalytic processes in industry, including many recent examples. Perfectly suited for self-study, it is the ideal companion for scientists who want to get into the field or refresh existing knowledge. The updated edition covers the full range of industrial aspects, from catalyst development and testing to process examples and catalyst recycling. The book is characterized by its practical relevance, expressed by a selection of over 40 examples of catalytic processes in industry. In addition, new chapters on catalytic processes with renewable materials and polymerization catalysis have been included. Existing chapters have been carefully revised and supported by new subchapters, for example, on metathesis reactions, refinery processes, petrochemistry and new reactor concepts. "I found the book accesible, readable and interesting - both as a refresher and as an introduction to new topics - and a convenient first reference on current industrial catalytic practise and processes." Excerpt from a book review for the second edition by P. C. H. Mitchell, Applied Organometallic Chemistry (2007)
Author: William B. Tolman
Publisher: John Wiley & Sons
ISBN: 3527609377
Category : Science
Languages : en
Pages : 382
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Book Description
The first to combine both the bioinorganic and the organometallic view, this handbook provides all the necessary knowledge in one convenient volume. Alongside a look at CO2 and N2 reduction, the authors discuss O2, NO and N2O binding and reduction, activation of H2 and the oxidation catalysis of O2. Edited by the highly renowned William Tolman, who has won several awards for his research in the field.
