Effects of oxide platforms on the dynamics and reduction characteristics of hydrogen spillover

Shun, Kazuki; Fujimoto, Akihito; Mori, Kohsuke et al.

Physical Chemistry Chemical Physics, 2024, 26, 28525-28532

Number of Access:421（2025-08-14 00:15 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/98566

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Title
Effects of oxide platforms on the dynamics and reduction characteristics of hydrogen spillover
Creator
CreatorName
Shun, Kazuki
CreatorName
Fujimoto, Akihito
NRID
1000090423087 1000090423087
ORCID
0000-0003-3915-4528 0000-0003-3915-4528
researchmap permalink
7000018582 7000018582
Scopus Author ID
35426128700 35426128700
CreatorName
Mori, Kohsuke
NRID
1000040200688 1000040200688
researchmap permalink
read0118536 read0118536
Scopus Author ID
7403649198 7403649198
CreatorName
Yamashita, Hiromi
Description
Shun K., Fujimoto A., Mori K., et al. Effects of oxide platforms on the dynamics and reduction characteristics of hydrogen spillover. Physical Chemistry Chemical Physics 26, 28525 (2024); https://doi.org/10.1039/d4cp03093a.
Abstract
The characteristics of hydrogen spillover on various metal oxides, involving the concurrent diffusion of protons (H⁺) and electrons (e⁻), were systematically studied by combining in situ analytical techniques with kinetic analyses. H₂-temperature programmed reduction and in situ X-ray absorption fine structure data showed that hydrogen spillover from Pt onto TiO₂ and WO₃ greatly decreased the temperatures at which Zn²⁺ ions deposited on these remote metal oxides were reduced. In contrast, hydrogen spillover on MgO and CeO₂ did not significantly affect the reduction of remote Zn²⁺. Mechanisms explaining the effects of spilled hydrogen on reduction for each oxide substrate were proposed based on the dynamic behaviors of H⁺ and e⁻ as ascertained by means of in situ spectroscopic characterizations and kinetic analyses. The results of this work indicate that e⁻ diffusion rather than H⁺ diffusion promotes the reduction of deposited metal ions and that interparticle hydrogen spillover can be facilitated over TiO₂ and WO₃ as a consequence of the interfacial diffusion of H⁺ and e⁻ pairs. These findings provide an improved understanding of the hydrogen spillover phenomenon.
Publisher
Royal Society of Chemistry
Source Title
Physical Chemistry Chemical Physics
Volume (Issue)
26
Page
28525-28532
Date of Issued
2024-11-05
Language
English
Handle URL
https://hdl.handle.net/11094/98566
PISSN
14639076
Relation.isVersionOf
DOI (Publisher Version)
https://doi.org/10.1039/d4cp03093a
Access Rights
embargoed access
CopyRight
Reproduced from Physical Chemistry Chemical Physics with permission from the Royal Society of Chemistry.
The full-text file will be made open to the public on 5 November 2025 in accordance with the publisher's policy.
oaire:version
Accepted Manuscript
Category
学術雑誌論文 Journal Article