An assessment of strategies for the development of solid-state adsorbents for vehicular hydrogen storage

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Nanoporous adsorbents are a diverse category of solid-state materials that hold considerable promise for vehicular hydrogen storage. Although impressive storage capacities have been demonstrated for several materials, particularly at cryogenic temperatures, materials meeting all of the targets established by the U.S. Department of Energy have yet to be identified. In this Perspective, we provide an overview of the major known and proposed strategies for hydrogen adsorbents, with the aim of guiding ongoing research as well as future new storage concepts. The discussion of each strategy includes current relevant literature, strengths and weaknesses, and outstanding challenges that preclude implementation. We consider in particular metal-organic frameworks (MOFs), including surface area/volume tailoring, open metal sites, and the binding of multiple H-2 molecules to a single metal site. Two related classes of porous framework materials, covalent organic frameworks (COFs) and porous aromatic frameworks (PAFs), are also discussed, as are graphene and graphene oxide and doped porous carbons. We additionally introduce criteria for evaluating the merits of a particular materials design strategy. Computation has become an important tool in the discovery of new storage materials, and a brief introduction to the benefits and limitations of computational predictions of H-2 physisorption is therefore presented. Finally, considerations for the synthesis and characterization of hydrogen storage adsorbents are discussed.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2018-10
Language
English
Article Type
Review
Citation

ENERGY & ENVIRONMENTAL SCIENCE, v.11, no.10, pp.2784 - 2812

ISSN
1754-5692
DOI
10.1039/c8ee01085d
URI
http://hdl.handle.net/10203/246906
Appears in Collection
CBE-Journal Papers(저널논문)
Files in This Item
Energy Environ. Sci., 2018, 11, 2784--2812.pdf(5.35 MB)Download
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