| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2019-01-21 |
| タイトル |
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タイトル |
Simultaneous Operando Time-Resolved XAFS–XRD Measurements of a Pt/C Cathode Catalyst in Polymer Electrolyte Fuel Cell under Transient Potential Operations |
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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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主題 |
Polymer electrolyte fuel cell (PEFC) |
| キーワード |
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言語 |
en |
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主題 |
Pt/C cathode catalyst |
| キーワード |
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言語 |
en |
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主題 |
Simultaneous operando time-resolved QXAFS−XRD measurements |
| キーワード |
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言語 |
en |
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主題 |
Transient response structural and electronic transformations |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Sekizawa, Oki
Uruga, Tomoya
Higashi, Kotaro
Kaneko, Takuma
Yoshida, Yusuke
Sakata, Tomohiro
Iwasawa, Yasuhiro
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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 |
We have succeeded in simultaneous operando time-resolved quick X-ray absorption fine structure (QXAFS)–X-ray diffraction (XRD) measurements at each acquisition time of 20 ms for a Pt/C cathode catalyst in a polymer electrolyte fuel cell (PEFC), while measuring the current/charge of the PEFC during the transient voltage cyclic processes (0.4 VRHE → 1.4 VRHE → 0.4 VRHE) under H2(anode)–N2(cathode). The rate constants for Pt–O bond formation/dissociation, Pt charging/discharging, Pt–Pt bond dissociation/reformation, and decrease/increase of Pt metallic-phase core size under the transient potential operations were determined by the combined time-resolved QXAFS–XRD technique. The present study provides a new insight into the transient-response reaction mechanism and structural transformation in the Pt surface layer and bulk, which are relevant to the origin of PEFC activity and durability as key issues for the development of next-generation PEFCs. |
| 書誌情報 |
en : ACS Sustainable Chemistry & Engineering
巻 5,
号 5,
p. 3631-3636,
発行日 2017-05-01
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| 出版者 |
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出版者 |
ACS Publications |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
2168-0485 |
| DOI |
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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 |
10.1021/acssuschemeng.7b00052 |
| 権利 |
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権利情報 |
This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Sustainable Chemistry & Engineering, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/abs/10.1021/acssuschemeng.7b00052. |
| 関連サイト |
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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/acssuschemeng.7b00052 |
| 著者版フラグ |
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出版タイプ |
AM |
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出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
Simultaneous Operando Time-Resolved (4.4 MB)
