Observation and Simulation of Hydrogen Storage via Spillover

Abstract

Hydrogen spillover refers to catalytic dissociation of hydrogen molecules followed by surface diffusion to the catalytic support. This mechanism has been proposed as a means to initiate hydrogen storage at ambient temperature. When catalytic dissociation of hydrogen is used to initiate room temperature hydrogen storage, this initiates weak chemisorption. High variations in experimental uptake, combined with theoretical calculations that are inconsistent with this mechanism, have made this concept controversial. Here, we review hydrogen uptake in porous carbon and metal-organic frameworks (MOFs), with emphasis on spectroscopic evidence of atomic hydrogen bound to the surface and resolution of discrepancies between experimental and theoretical studies. We conclude with a perspective of hydrogen spillover for future material design, hydrogen storage, and fundamental understanding of a process that is crucial for adsorption and catalysis.

Department(s)

Chemical and Biochemical Engineering

Comments

This work is supported by the Ministry of Science and Technology, Taiwan; Award MOST 104-2218-E-009-031-MY3 and MOST 106-2221-E-009-202, and also by (while AL was serving at) the National Science Foundation .

Keywords and Phrases

Crystalline materials; Dissociation; Organic carbon; Organometallics; Porous materials, Catalytic supports; Hydrogen molecule; Hydrogen spill overs; Material designs; Metalorganic frameworks (MOFs); Spectroscopic evidence; Theoretical calculations; Theoretical study, Hydrogen storage

International Standard Serial Number (ISSN)

2211-3398

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2018 Elsevier Ltd, All rights reserved.

Publication Date

01 Sep 2018

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