Download or read book The Kubas Interaction in Transition Metal Based Hydrogen Storage Materials written by Claire Victoria Jane Skipper and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Kubas Interaction in Transition Metal Based Hydrogen Storage Materials written by C. V. J. Skipper and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Exploring the Kubas Interaction in Transition Metal Hydrides for Hydrogen Storage Applications Using Computational Methods written by James Hales and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrogen Adsorption by Late Transition Metal Complexes Confined in Nanoporous Carbon Materials written by Mohammad Andalibi and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid-state hydrogen storage technologies are the most viable options for mobile vehicular applications mainly due to their compactness and safety as compared to compressed gas or liquid hydrogen tanks. However, each of the two groups classified as solid-state storage methods suffers from limitations. On the one hand, physisorption has extremely low storage capacity at near ambient temperature because of the low enthalpy of hydrogen sorption, but it is reversible. On the other hand, chemisorption has high heat of hydrogen binding ensuing significant uptake capacity associated with irreversibility at moderate temperatures, which necessitates providing heat to release absorbed hydrogen. Hence, developing intermediate technologies, integrating promising properties of both groups, has primary importance to realize hydrogen economy. Dihydrogen complexes are well known for their ability to reversibly interact with H2. Transition metal complexes with an unsaturated metal center are among compounds interacting with H2 through so called Kubas interaction. This kind of interaction involves side on donation of hydrogen [sigma] bond electrons to an empty d-orbital of the metal center subsequently stabilized by back donation from the filled d-orbitals to the [sigma]* orbital of H2. Such materials attract hydrogen with an enthalpy intermediate between that of physical and chemical sorption (ca. 60-85 kJ/mol for stable transition metal complexes and 15-40 kJ/mol for the weakly bound dihydrogen systems at high pressure). The major drawback of such systems is the redundant weight imposed by co-ligands which are necessary to arrest dihydrogen structure and prevent bond rupture. This, in turn, adds to system weight which reduces the overall uptake capacity. Dihydrogen complexation is the first step in H2 activation process by metal complexes. In other words, any hydrogenation catalyst potentially can form dihydrogen complex. Pioneering works on H2 activation by Halpern and coworkers introduced Cu(II) complexes (e.g. cupric acetate) as active catalysts able to heterolytically break dihydrogen via homogeneous mechanism. These complexes were able to reduce more reactive materials such as Cr2O72- or para-benzoquinone but not less reactive olefins. Halpern deduced in the latter case that the reverse reaction producing the initial complex and dihydrogen defeats hydrogen transfer from the hydride to the substrate. This was the incentive for the current study, that is these materials react with dihydrogen in a reversible manner and further they are lighter than conventional Kubas compounds. This entices seeking a way to stabilize dihydrogen complexes of such compounds at reasonable conditions for use as a storage medium. Recently, researchers have come up with a novel technique called nanoconfinement to alter thermodynamics and/or kinetics of chemical hydrides. Based on this method, reducing the size of storage medium to nm range via its confinement in porous scaffolds could alter its behavior. This is mainly due to increased surface energy induced by decreasing the particle size that renders molecules more reactive. Moreover, nanoconfinement could arrest dihydrogen structure by steric hindrance as it does not let proton and hydride separate enough upon H2 cleavage. Therefore, the goal of this study was to employ nanoporous carbon scaffolds as a host for nanosized, lightweight, under-coordinated Cu complexes in order to tailor their behavior so that they reversibly interact with H2 at ambient temperature. This novel class of storage media offers benefits from both ordinary chemisorption and physisorption systems at the same time.
Download or read book Hydrogen Storage Materials written by R. G. Barnes and published by . This book was released on 1988 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ames Laboratory, Iowa, USA
Download or read book Applied Biopolymer Technology and Bioplastics written by Neha Kanwar Rawat and published by CRC Press. This book was released on 2021-03-29 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: With growing concern for the environment and the rising price of crude oil, there is increasing demand for non-petroleum-based polymers from renewable resources. Recognizing emerging developments in biopolymer systems research, this book brings together a number of key biopolymer and bioplastic topics in one place. The book highlights the importance and impact of eco-friendly green biopolymers and bioplastics, both environmentally and economically. It provides important insight into the diversity of polymers obtained directly from, or derived from, renewable resources. This volume, Applied Biopolymer Technology and Bioplastics: Sustainable Development by Green Engineering Materials, will be valuable for a broad audience of engineers and scientists, especially those designing with biopolymers and biodegradable plastics, or evaluating the options for switching from traditional plastics to biopolymers. The content of this book will prove useful for students, researchers, and professionals working in the field of green technology.
Download or read book Graphene based Energy Devices written by A. Rashid bin Mohd Yusoff and published by John Wiley & Sons. This book was released on 2015-02-03 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first book dedicated to the topic provides an up-to-date account of the many opportunities graphene offers for robust, workable energy generation and storage devices. Following a brief overview of the fundamentals of graphene, including the main synthesis techniques, characterization methods and properties, the first part goes on to deal with graphene for energy storage applications, such as lithium-ion batteries, supercapacitors and hydrogen storage. The second part is concerned with graphene-based energy-generation devices, in particular conventional as well as microbial and enzymatic fuel cells, with chapters on graphene photovoltaics rounding off the book. Throughout, device architectures are not only discussed on a laboratory scale, but also ways for upscaling to an industrial level, including manufacturing processes and quality control. By bridging academic research and industrial development this is invaluable reading for materials scientists, physical chemists, electrochemists, solid state physicists, and those working in the electrotechnical industry.
Download or read book Emerging Materials for Energy Conversion and Storage written by Kuan Yew Cheong and published by Elsevier. This book was released on 2018-08-09 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emerging Materials for Energy Conversion and Storage presents the state-of-art of emerging materials for energy conversion technologies (solar cells and fuel cells) and energy storage technologies (batteries, supercapacitors and hydrogen storage). The book is organized into five primary sections, each with three chapters authored by worldwide experts in the fields of materials science, physics, chemistry and engineering. It covers the fundamentals, functionalities, challenges and prospects of different classes of emerging materials, such as wide bandgap semiconductors, oxides, carbon-based nanostructures, advanced ceramics, chalcogenide nanostructures, and flexible organic electronics nanomaterials. The book is an important reference for students and researchers (from academics, but also industry) interested in understanding the properties of emerging materials. - Explores the fundamentals, challenges and prospects for the application of emerging materials in the development of energy conversion and storage devices - Presents a discussion of solar cell and photovoltaic, fuel cell, battery electrode, supercapacitor and hydrogen storage applications - Includes notable examples of energy devices based on emerging materials to illustrate recent advances in this field
Download or read book Materials Issues in a Hydrogen Economy written by Puru Jena and published by World Scientific. This book was released on 2009 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings of the International Symposium on Materials Issues in a Hydrogen Economy addresses fundamental materials science issues and challenges concerning the production, storage, and use of hydrogen. The volume also deals with safety and education issues. The contributors OCo researchers in physics, chemistry, materials science, and engineering OCo share their ideas and results to delineate outstanding materials problems in a hydrogen economy and to guide the future research.
Download or read book Nanomaterials for Hydrogen Storage Applications written by Fatih Şen and published by Elsevier. This book was released on 2020-09-09 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanomaterials for Hydrogen Storage Applications introduces nanomaterials and nanocomposites manufacturing and design for hydrogen storage applications. The book covers the manufacturing, design, characterization techniques and hydrogen storage applications of a range of nanomaterials. It outlines fundamental characterization techniques for nanocomposites to establish their suitability for hydrogen storage applications. Offering a sound knowledge of hydrogen storage application of nanocomposites, this book is an important resource for both materials scientists and engineers who are seeking to understand how nanomaterials can be used to create more efficient energy storage solutions. - Assesses the characterization, design, manufacture and application of different types of nanomaterials for hydrogen storage - Outlines the major challenges of using nanomaterials in hydrogen storage - Discusses how the use of nanotechnology is helping engineers create more effective hydrogen storage systems
Download or read book Hydrogen Storage Materials written by Darren P. Broom and published by Springer Science & Business Media. This book was released on 2011-02-28 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of storing hydrogen safely and effectively is one of the major technological barriers currently preventing the widespread adoption of hydrogen as an energy carrier and the subsequent transition to a so-called hydrogen economy. Practical issues with the storage of hydrogen in both gas and liquid form appear to make reversible solid state hydrogen storage the most promising potential solution. Hydrogen Storage Materials addresses the characterisation of the hydrogen storage properties of the materials that are currently being considered for this purpose. The background to the topic is introduced, along with the various types of materials that are currently under investigation, including nanostructured interstitial and complex hydrides, and porous materials, such as metal-organic frameworks and microporous organic polymers. The main features of Hydrogen Storage Materials include: an overview of the different types of hydrogen storage materials and the properties that are of interest for their practical use; descriptions of the gas sorption measurement methods used to determine these properties, and the complementary techniques that can be used to help corroborate hydrogen uptake data; and extensive coverage of the practical considerations for accurate hydrogen sorption measurement that drive both instrument design and the development of experimental methodology. Hydrogen Storage Materials provides an up-to-date overview of the topic for experienced researchers, while including enough introductory material to serve as a useful, practical introduction for newcomers to the field.
Download or read book Novel Carbon Adsorbents written by Juan M.D. Tascón and published by Elsevier. This book was released on 2012-11-23 with total page 703 pages. Available in PDF, EPUB and Kindle. Book excerpt: Following in the lineage of Adsorption by Carbons (Bottani & Tascon, 2008), this work explores current research within contemporary novel carbon adsorbents. Both basic and applied aspects are discussed for this important class of materials. The first section of the book introduces physical adsorption and carbonaceous materials, and is followed by a section concerning the fundamentals of adsorption by carbons. This leads to development of a series of theoretical concepts that serve as an introduction to the following section in which adsorption is mainly envisaged as a tool to characterize the porous texture and surface chemistry of carbons. Particular attention is paid to novel nanocarbons, and the electrochemistry of adsorption by carbons is also addressed. Finally, several important technological applications of gas and liquid adsorption by carbons in areas such as environmental protection and energy storage constitute the last section of the book. - Encompasses fundamental science of adsorption by carbons, in one location, supporting current R&D without extensive literature review - Describes adsorption as it is currently applied to major novel types of carbon materials, including carbon gels, carbide-derived carbons, zeolite-templated carbvons, hydrothermal carbons, carbon nanohorns and graphene - Specific discussion of fuel storage, environmental remediation and biomedical applications, of contemporary interest to many surface chemists and applications-focused researchers
Download or read book Hydrogen Storage Materials and Method of Making by Dry Homogenation written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dry homogenized metal hydrides, in particular aluminum hydride compounds, as a material for reversible hydrogen storage is provided. The reversible hydrogen storage material comprises a dry homogenized material having transition metal catalytic sites on a metal aluminum hydride compound, or mixtures of metal aluminum hydride compounds. A method of making such reversible hydrogen storage materials by dry doping is also provided and comprises the steps of dry homogenizing metal hydrides by mechanical mixing, such as be crushing or ball milling a powder, of a metal aluminum hydride with a transition metal catalyst. In another aspect of the invention, a method of powering a vehicle apparatus with the reversible hydrogen storage material is provided.
Download or read book Computational Approaches to Energy Materials written by Richard Catlow and published by John Wiley & Sons. This book was released on 2013-04-03 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of materials for clean and efficient energy generation and storage is one of the most rapidly developing, multi-disciplinary areas of contemporary science, driven primarily by concerns over global warming, diminishing fossil-fuel reserves, the need for energy security, and increasing consumer demand for portable electronics. Computational methods are now an integral and indispensable part of the materials characterisation and development process. Computational Approaches to Energy Materials presents a detailed survey of current computational techniques for the development and optimization of energy materials, outlining their strengths, limitations, and future applications. The review of techniques includes current methodologies based on electronic structure, interatomic potential and hybrid methods. The methodological components are integrated into a comprehensive survey of applications, addressing the major themes in energy research. Topics covered include: • Introduction to computational methods and approaches • Modelling materials for energy generation applications: solar energy and nuclear energy • Modelling materials for storage applications: batteries and hydrogen • Modelling materials for energy conversion applications: fuel cells, heterogeneous catalysis and solid-state lighting • Nanostructures for energy applications This full colour text is an accessible introduction for newcomers to the field, and a valuable reference source for experienced researchers working on computational techniques and their application to energy materials.
Download or read book New and Future Developments in Catalysis written by Yongfeng Liu and published by Elsevier Inc. Chapters. This book was released on 2013-07-11 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrogen Electrical Vehicles written by Mehmet Sankir and published by John Wiley & Sons. This book was released on 2023-03-21 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: HYDROGEN ELECTRICAL VEHICLES Hydrogen electrical vehicles are an essential component of the “Green New Deal” and this book covers cutting-edge technologies designed for fuel-cell-powered cars. The realization of the decision of 28 countries to keep global warming at 2 degrees and below, which is stated in the Paris Agreement, and the achievement of minimizing CO2 emissions, can only be accomplished by establishing a hydrogen ecosystem. A new geopolitical order is envisaged, in which sectors dealing with energy production, distribution, and storage, thus decreasing the carbon footprint, are reconstructed. In short, an economic order with new tax regulations is being created in which the carbon footprint will be followed. This global effort called the “Green Deal” is defined as a new growth strategy aiming at net-zero CO2 emissions. We know that the total share of transportation in CO2 emissions is about 24%. Therefore, efforts for reducing emissions must include utilizing hydrogen in transport. The subjects covered in the book include: An introduction to hydrogen and electrical vehicles; Hydrogen storage and compression systems; Hydrogen propulsion systems for UAVs; Test and evaluation of hydrogen fuel cell vehicles; Hydrogen production and PEM fuel cells for electrical vehicles; The power and durability issues of fuel cell vehicles. Audience The book will attract readers from diverse fields such as chemistry, physics, materials science, engineering, mechanical and chemical engineering, as well as energy-focused engineering and hydrogen generation industry programs that will take advantage of using this comprehensive review of the hydrogen electrical vehicles.
Download or read book Theoretical and Experimental Exploration of Transition Metals as Hydrogen Storage Materials with Catalytic Dehydrogenation Activity written by Quan K. Do and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The direct conversion of readily-available methane into useful chemicals is limited due to the molecule’s symmetry and strong C-H bonds. In this thesis, the direct upgrade of methane to desirable higher hydrocarbons is sought. Presently, the most studied method for the upgrade of methane is the oxidative coupling of methane. However, this method has failed to yield an economically viable process due to poor carbon selectivities, which result from the over-oxidation of the reactive CH3 intermediate into CO and CO2. To avoid over-oxidation, the use of hydride-forming metals is explored to catalytically cleave the C-H bond, abstract hydrogen, and form C2 species in the absence of oxygen. Theoretical and experimental results show that five early transition metals can form metal hydrides and activate the C-H bond of methane. The understanding gained through this thesis builds the foundation for future work on the utilization of metal hydrides in important reactions.
