Electrolytic Hydrogen Release from Hydrogen Boride Sheets.

Autor: Kawamura S; Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Meguro-ku, Tokyo, 152-8552, Japan., Yamaguchi A; Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Meguro-ku, Tokyo, 152-8552, Japan., Miyazaki K; Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Meguro-ku, Tokyo, 152-8552, Japan., Ito SI; Department of Materials Science, Institute of Pure and Applied Sciences, University of Tsukuba, Tsukuba, 305-8573, Japan., Watanabe N; Graduate school of Science and Technology, University of Tsukuba, Tsukuba, 305-8573, Japan., Hamada I; Department of Precision Engineering, Graduate School of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan., Kondo T; Department of Materials Science, Institute of Pure and Applied Sciences, University of Tsukuba, Tsukuba, 305-8573, Japan.; The Advanced Institute for Materials Research, Tohoku University, Sendai, Miyagi, 980-8577, Japan.; Tsukuba Research Center for Energy Materials Science, Institute of Pure and Applied Sciences and R&D Center for Zero CO2 Emission Functional Materials, University of Tsukuba, Tsukuba, 305-8573, Japan., Miyauchi M; Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Meguro-ku, Tokyo, 152-8552, Japan.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Jul; Vol. 20 (27), pp. e2310239. Date of Electronic Publication: 2024 Feb 01.
DOI: 10.1002/smll.202310239
Abstrakt: Solid-state hydrogen storage materials are safe and lightweight hydrogen carriers. Among the various solid-state hydrogen carriers, hydrogen boride (HB) sheets possess a high gravimetric hydrogen capacity (8.5 wt%). However, heating at high temperatures and/or strong ultraviolet illumination is required to release hydrogen (H 2 ) from HB sheets. In this study, the electrochemical H 2 release from HB sheets using a dispersion system in an organic solvent without other proton sources is investigated. H 2 molecules are released from the HB sheets under the application of a cathodic potential. The Faradaic efficiency for H 2 release from HB sheets reached >90%, and the onset potential for H 2 release is -0.445 V versus Ag/Ag + , which is more positive than those from other proton sources, such as water or formic acid, under the same electrochemical conditions. The total electrochemically released H 2 in a long-time experiment reached ≈100% of the hydrogen capacity of HB sheets. The H 2 release from HB sheets is driven by a small bias; thus, they can be applied as safe and lightweight hydrogen carriers with economical hydrogen release properties.
(© 2024 The Authors. Small published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
Externí odkaz: