Item type |
学術雑誌論文 / Journal Article(1) |
公開日 |
2024-04-02 |
タイトル |
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言語 |
en |
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タイトル |
Roles of structural defects in polycrystalline platinum nanowires for enhanced oxygen reduction activity |
言語 |
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言語 |
eng |
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 |
Xiao, Zhao
Takao, Shinobu
Yoshida, Yusuke
Kaneko, Takuma
Gunji, Takao
Higashi, Kotaro
Uruga, Tomoya
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 |
Nanocatalysts have uneven reactivity and lively change in reactions, challenging revealing catalytic origins. Phenomenologically, Pt-based nanowires, one of the most important nanostructures, have displayed high activity for oxygen reduction reaction (ORR); however, the fundamentally catalytic origin behind such high performance remains elusive and was implicitly ascribed to one-dimensional structure and/or low-index facets. Here, with molecular-level and operando spectroscopic evidence, we reveal that the polycrystalline platinum nanowires with enhanced ORR activity are closely correlated with structural defects including grain boundaries (GBs), atomic steps, and a few amorphous regions, which is previously neglected or simplified. The local micro-strain is induced by GBs and increases with misorientation angles of GBs. Despite the same coordination number between edge sites and atomic steps, the latter together with a few amorphous regions disturb interfacial water networks via preferably hydrogen bonding, which destabilizes ORR intermediates on terraces and presumably promotes proton transfer. |
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言語 |
en |
書誌情報 |
en : Applied Catalysis B: Environmental
巻 324,
p. 122268,
発行日 2023-05-05
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出版者 |
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出版者 |
Elsevier |
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 |
1873-3883 |
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 |
https://doi.org/10.1016/j.apcatb.2022.122268 |
著者版フラグ |
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出版タイプ |
SMUR |
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出版タイプResource |
http://purl.org/coar/version/c_71e4c1898caa6e32 |