The Experts below are selected from a list of 57039 Experts worldwide ranked by ideXlab platform
Frantisek Svec - One of the best experts on this subject based on the ideXlab platform.
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Nanoporous polymers for Hydrogen Storage
Small, 2009Co-Authors: Jonathan Germain, Jean M. J. Fréchet, Frantisek SvecAbstract:The design of Hydrogen Storage materials is one of the principal challenges that must be met before the development of a Hydrogen economy. While Hydrogen has a large specific energy, its volumetric energy density is so low as to require development of materials that can store and release it when needed. While much of the research on Hydrogen Storage focuses on metal hydrides, these materials are currently limited by slow kinetics and energy inefficiency. Nanostructured materials with high surface areas are actively being developed as another option. These materials avoid some of the kinetic and thermodynamic drawbacks of metal hydrides and other reactive methods of storing Hydrogen. In this work, progress towards Hydrogen Storage with nanoporous materials in general and porous organic polymers in particular is critically reviewed. Mechanisms of formation for crosslinked polymers, hypercrosslinked polymers, polymers of intrinsic microporosity, and covalent organic frameworks are discussed. Strategies for controlling Hydrogen Storage capacity and adsorption enthalpy via manipulation of surface area, pore size, and pore volume are discussed in detail.
Henrietta W. Langmi - One of the best experts on this subject based on the ideXlab platform.
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Metal–organic frameworks for Hydrogen Storage
Compendium of Hydrogen Energy, 2015Co-Authors: Henrietta W. Langmi, Jianwei Ren, Nicholas M MusyokaAbstract:Over the past decade, Hydrogen Storage in metal–organic frameworks (MOFs) has received increasing attention worldwide because they possess versatile structures, high surface areas, large free volumes, ultrahigh porosities, and tunable pore geometries and functionalities. This chapter presents an overview of Hydrogen Storage in MOFs. It first examines synthetic aspects together with the principal methods that have been employed to synthesize MOFs. The chapter then discusses some of the efforts of Hydrogen Storage in MOFs at cryo- and room temperature, with an emphasis on the factors that affect Hydrogen Storage and some attempts to enhance Hydrogen Storage. The chapter also briefly examines the approach of nanoconfinement of chemical hydrides in MOFs.
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Hydrogen Storage in Metal-Organic Frameworks: A Review
Electrochimica Acta, 2014Co-Authors: Henrietta W. Langmi, Brian C. North, Jianwei Ren, Mkhulu Mathe, Dmitri BessarabovAbstract:Abstract Metal-organic frameworks (MOFs) for Hydrogen Storage have continued to receive intense interest over the past decade. MOFs are a class of organic-inorganic hybrid crystalline materials consisting of metallic moieties that are linked by strong coordination bonds to organic ligands. They exhibit a great structural diversity and possess low weight, exceptionally high surface areas, large free volumes, and tunable pore sizes and functionalities, making them extremely attractive for a variety of applications such as Hydrogen Storage. For these reasons MOFs have been extensively studied. In this paper, a review of recent developments on Hydrogen Storage in MOFs is presented, with a focus on the effects of various factors including open metal sites, ‘guest’ metal ions, ligand functionalization, surface area, pore volume, pore size, and Pt or Pd metal nanoparticles, on Hydrogen Storage. In addition, the review examines the emerging research on MOF hybrid Hydrogen Storage systems, primarily in the context of employing MOFs for nanoconfinement of high temperature Hydrogen Storage materials. The review focuses on experimental studies.
Dmitri Bessarabov - One of the best experts on this subject based on the ideXlab platform.
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Hydrogen Storage in Metal-Organic Frameworks: A Review
Electrochimica Acta, 2014Co-Authors: Henrietta W. Langmi, Brian C. North, Jianwei Ren, Mkhulu Mathe, Dmitri BessarabovAbstract:Abstract Metal-organic frameworks (MOFs) for Hydrogen Storage have continued to receive intense interest over the past decade. MOFs are a class of organic-inorganic hybrid crystalline materials consisting of metallic moieties that are linked by strong coordination bonds to organic ligands. They exhibit a great structural diversity and possess low weight, exceptionally high surface areas, large free volumes, and tunable pore sizes and functionalities, making them extremely attractive for a variety of applications such as Hydrogen Storage. For these reasons MOFs have been extensively studied. In this paper, a review of recent developments on Hydrogen Storage in MOFs is presented, with a focus on the effects of various factors including open metal sites, ‘guest’ metal ions, ligand functionalization, surface area, pore volume, pore size, and Pt or Pd metal nanoparticles, on Hydrogen Storage. In addition, the review examines the emerging research on MOF hybrid Hydrogen Storage systems, primarily in the context of employing MOFs for nanoconfinement of high temperature Hydrogen Storage materials. The review focuses on experimental studies.
Jonathan Germain - One of the best experts on this subject based on the ideXlab platform.
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Nanoporous polymers for Hydrogen Storage
Small, 2009Co-Authors: Jonathan Germain, Jean M. J. Fréchet, Frantisek SvecAbstract:The design of Hydrogen Storage materials is one of the principal challenges that must be met before the development of a Hydrogen economy. While Hydrogen has a large specific energy, its volumetric energy density is so low as to require development of materials that can store and release it when needed. While much of the research on Hydrogen Storage focuses on metal hydrides, these materials are currently limited by slow kinetics and energy inefficiency. Nanostructured materials with high surface areas are actively being developed as another option. These materials avoid some of the kinetic and thermodynamic drawbacks of metal hydrides and other reactive methods of storing Hydrogen. In this work, progress towards Hydrogen Storage with nanoporous materials in general and porous organic polymers in particular is critically reviewed. Mechanisms of formation for crosslinked polymers, hypercrosslinked polymers, polymers of intrinsic microporosity, and covalent organic frameworks are discussed. Strategies for controlling Hydrogen Storage capacity and adsorption enthalpy via manipulation of surface area, pore size, and pore volume are discussed in detail.
Min Zhu - One of the best experts on this subject based on the ideXlab platform.
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Magnesium-based Hydrogen Storage compounds: A review
Journal of Alloys and Compounds, 2020Co-Authors: Liuzhang Ouyang, Fen Liu, Hui Wang, Jiangwen Liu, Xu-sheng Yang, Lixian Sun, Min ZhuAbstract:Abstract One of the key points to boost the application of fuel cells is the progress in the development of Hydrogen Storage alloys with appealing high capacity. Of the numerous candidate alloys for storing Hydrogen, magnesium (Mg)-based alloys have been progressively attracting great attention owing to their abundance, low densities, and considerable capacities of Hydrogen Storage. Nevertheless, the practical applications of Mg-based Hydrogen Storage alloys are still seriously hampered by their sluggish kinetics and relative stable thermodynamic characteristics. At present, some strategies have been utilizing to tune the Hydrogen Storage properties of Mg-based alloys, but they are still insufficient to fulfill the requirements for practical industrial applications. In this review, advanced synthetic approaches and some effective strategies including alloying, nanostructuring, doping by catalytic additives and forming nanocomposites with other hydrides, etc., to enhance the requirements properties of Mg-based Hydrogen Storage alloys are summarized, and then the prospects for further promoting the properties of Mg-based Hydrogen Storage materials are also briefly discussed.
