| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2025-04-07 |
| タイトル |
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タイトル |
Understanding the Activation Mechanism of RhCrOx Cocatalysts for Hydrogen Evolution with Nanoparticulate Electrodes |
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言語 |
en |
| 言語 |
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言語 |
eng |
| キーワード |
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言語 |
en |
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キーワード |
cocatalyst |
| キーワード |
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言語 |
en |
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キーワード |
electrocatalyst |
| キーワード |
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言語 |
en |
|
キーワード |
hydrogen evolution |
| キーワード |
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言語 |
en |
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キーワード |
photocatalyst |
| キーワード |
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言語 |
en |
|
キーワード |
rhodium−chromium oxide |
| 資源タイプ |
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資源タイプ |
journal article |
| アクセス権 |
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アクセス権 |
open access |
| 著者 |
東, 智弘
WEKO
35376
e-Rad_Researcher
80762088
| ja |
東, 智弘
宮崎大学
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| ja-Kana |
ヒガシ, トモヒロ
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| en |
Higashi, Tomohiro
University of Miyazaki
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Search repository
Seki, Kazuhiko
Nandal, Vikas
Pihosh, Yuriy
Nakabayashi, Mamiko
Shibata, Naoya
Domen, Kazunari
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Mixed oxides of Rh–Cr (RhCrOx), containing Rh3+ and Cr3+ cations, are commonly used as cocatalysts for the hydrogen evolution reaction (HER) on particulate photocatalysts. The precise physicochemical mechanisms of the HER at the catalytic sites of these oxides are not well understood. In this study, model cocatalyst electrodes, composed of nanoparticulate RhCrOx, were fabricated to investigate the physicochemical mechanisms of the HER. Electroanalytical and X-ray photoelectron spectroscopic measurements revealed that nanoparticulate RhCrOx produces reduced Rh (Rh0) species by maintaining an electrode potential more negative than 0.03 V versus the reversible hydrogen electrode (VRHE). This results in significant enhancement of the HER activity. The catalytic activity for the HER stems from the reduced Rh species, and the inclusion of Cr3+ (CrOx) aided in the electron transfer process at the solid/liquid interface, resulting in a higher current density during the HER. To achieve a solar-to-hydrogen efficiency of over 3%, the conduction band minimum of the particulate photocatalyst should be positioned more negatively than −0.10 VRHE. Moreover, the formation of electron trap states at potentials more positive than 0.03 VRHE should be avoided. This study highlights the importance of understanding the catalytic sites on metal oxide cocatalysts. Moreover, it offers a design strategy for enhancing the efficiency of photocatalytic water splitting. |
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言語 |
en |
| 内容記述 |
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内容記述タイプ |
Other |
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内容記述 |
Citation: Tomohiro Higashi, Kazuhiko Seki, Vikas Nandal, Yuriy Pihosh, Mamiko Nakabayashi, Naoya Shibata, Kazunari Domen, Understanding the Activation Mechanism of RhCrOx Cocatalysts for Hydrogen Evolution with Nanoparticulate Electrodes, ACS Applied Materials & Interfaces, 16(20), 26325-26339, 2024-05-08, https://doi.org/10.1021/acsami.4c04841 |
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言語 |
en |
| bibliographic_information |
en : ACS Applied Materials & Interfaces
巻 16,
号 20,
p. 26325-26339,
発行日 2024-05-08
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| 出版者 |
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出版者 |
American Chemical Society (ACS) |
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言語 |
en |
| ISSN |
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収録物識別子タイプ |
PISSN |
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収録物識別子 |
1944-8244 |
| ISSN |
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収録物識別子タイプ |
EISSN |
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収録物識別子 |
1944-8252 |
| item_10001_relation_14 |
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関連タイプ |
isVersionOf |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1021/acsami.4c04841 |
| 権利 |
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権利情報 |
© 2024 American Chemical Society |
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言語 |
en |
| 出版タイプ |
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出版タイプ |
AM |
Revised manuscript (1.8 MB)
