Development and Mechanistic Studies of Molecularly Defined Water Oxidation Catalysts PDF Download
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Author:
Publisher:
ISBN: 9789174476262
Category :
Languages : en
Pages : 80
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Book Description
Author:
Publisher:
ISBN: 9789174476262
Category :
Languages : en
Pages : 80
Get Book Here
Book Description
Author:
Publisher:
ISBN: 9789463326445
Category :
Languages : en
Pages : 160
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Book Description
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: 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: 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: Dmitry Lebedev
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Derek Joel Wasylenko
Publisher:
ISBN: 9780494926826
Category :
Languages : en
Pages :
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Book Description
Author: Dalton Bodine Burks
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 292
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Book Description
The majority of energy produced in the world is derived from fossil fuels which are finite and have deleterious environmental effects. For a sustainable and environmentally-friendly energy future, alternative, renewable energy sources are desired. Two reactions that could have applications towards developing renewable energy sources are water oxidation to produce hydrogen and carbon dioxide reduction to form various products (e.g. formic acid or carbon monoxide); however, these reactions require catalysts to efficiently produce the desired products. Efforts to synthesize, characterize, and study catalysts for these reactions are discussed in this dissertation. The first chapter serves as an introduction to energy-related catalytic reactions. In Chapter 2, 6,6ʹ-dihydroxybipyridine (6,6ʹ-dhbp)-a protic ligand used with several metals to produce catalysts for energy-related reactions-is studied to determine its thermodynamic acidity. In the following chapter, 6,6ʹ-dhbp is used as a ligand with copper to form complexes that are water oxidation catalysts. Chapters 4 and 5 focus on iridium and ruthenium complexes containing new bidentate ligands composed of pyridinol and N-heterocyclic carbenes (NHCs). These complexes, along with an iridium complex of 6,6ʹ-dhbp, were used as catalysts for the hydrogenation of carbon dioxide to formate and the reverse dehydrogenation of formic acid to carbon dioxide and hydrogen. However, the complexes containing the new bidentate pyridinol-NHC ligands were found to be precatalysts as they undergo transformations and decomposition during the course of the reaction. A nickel-pincer complex with a protic CNC-pincer derived of pyridinol and NHCs was used as a photocatalyst for carbon dioxide reduction in Chapter 6. The protic state of the hydroxy group in the 4-position of the pyridine ring was determined to be important for catalysis, as the deprotonated hydroxy group results in 10 times the catalytic ability as the protonated form. In the penultimate chapter, ruthenium-pincer complexes that are active carbon dioxide photoreduction catalysts are studied mechanistically by UV/vis and IR spectroscopies. The most active catalyst was studied in greater detail with real-time IR spectroscopy to help elucidate potential reaction pathways. The final chapter serves as a conclusion to summarize the results discussed in the dissertation.
Author: Carminna Ottone
Publisher: Springer
ISBN: 3030127125
Category : Technology & Engineering
Languages : en
Pages : 117
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Book Description
This book offers comprehensive information on the main techniques for measuring water-oxidation-catalyst (WOC) performance, with a particular focus on the combined use of sacrificial oxidants and dyes within closed-batch reactors. It provides an overview of the latest advances in the synthesis of more efficient WOCs, followed by an analysis of the requirements for sustainable energy production. Readers will find a detailed description of the reaction mechanism used in catalyst assessment systems, which reveals the benefits and limitations of the most common sacrificial oxidant/dye pair. Experimental techniques including electrochemical methods for characterizing novel and non-photoactive WOCs are also described. Throughout the book, various manganese oxides are used as examples of the techniques reviewed or proposed systems. Cost considerations and technological perspectives of the scale-up of solar-driven hydrogen production are also addressed. Lastly, the book presents lessons learned from the implementation of a large-scale real-world device.
Author: Robert E. Blankenship
Publisher: John Wiley & Sons
ISBN: 1405189762
Category : Science
Languages : en
Pages : 312
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Book Description
With the clear writing and accessible approach that have made it the authoritative introduction to the field of molecular photosynthesis, this fully revised and updated edition now offers students and researchers cutting-edge topical coverage of bioenergy applications and artificial photosynthesis; advances in biochemical and genetic methods; as well as new analytical techniques. Chapters cover the origins and evolution of photosynthesis; carbon metabolism; photosynthetic organisms and organelles; and the basic principles of photosynthetic energy storage. The book's website includes downloadable PowerPoint slides.
