| アイテムタイプ |
itemtype_ver1(1) |
| 公開日 |
2025-11-04 |
| タイトル |
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タイトル |
Composition- and Size-Dependent Ammonia Electrooxidation Activity of Homogeneously Alloyed PtIr Nanoparticles Prepared by an Ionic Liquid/Metal Sputtering Deposition Technique |
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言語 |
en |
| 著者 |
Liu, Yixiong
Akiyoshi, Kazutaka
Kameyama, Tatsuya
Kawawaki, Tokuhisa
Negishi, Yuichi
Kuwabata, Susumu
Torimoto, Tsukasa
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| アクセス権 |
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アクセス権 |
embargoed access |
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アクセス権URI |
http://purl.org/coar/access_right/c_f1cf |
| 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 Electrochemistry], 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/articlesonrequest/AOR-WJ6VRBPDHTE3TCHTU9KE].” |
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言語 |
en |
| 内容記述 |
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内容記述タイプ |
Abstract |
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内容記述 |
Homogeneously alloyed bimetallic PtIr nanoparticles (NPs) were successfully prepared by the simultaneous sputtering of Pt and Ir onto a room-temperature ionic liquid (RTIL) of N,N-diethyl-N-methyl-N-(2-methoxyethyl)ammonium tetrafluoroborate (DEME-BF4) at room temperature without any additional stabilizing agents. The alloy composition of PtIr NPs was controlled by varying the surface areas of the Pt and Ir plates used as sputtering targets. Catalyst powders (PtIr/CB) were prepared by heating the RTIL containing PtIr NPs with added carbon black (CB) powders. The particle size of PtIr NPs on CB increased from ca. 1.3 to 3.2 nm with an increase in the heating temperature from 100 to 300 °C. Further size enlargement of PtIr NPs was achieved through post-heat treatment of isolated PtIr/CB at 300–500 °C for 1 h. The electrocatalytic activity for the ammonia oxidation reaction (AOR) of PtIr/CB catalysts was significantly influenced by particle size, with optimal activity observed at a size of ca. 2.5 nm. The composition of the PtIr alloy also affected catalytic performance, displaying a volcano-like dependence on the Pt fraction. The highest AOR activity was obtained with ca. 2.5 nm PtIr NPs at a Pt fraction of 73%, showing a specific activity ca. 1.6 times higher than that of pure Pt NPs of similar size. |
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言語 |
en |
| 出版者 |
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出版者 |
ACS Publications |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプresource |
http://purl.org/coar/resource_type/c_6501 |
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タイプ |
journal article |
| 出版タイプ |
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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 |
| 関連情報 |
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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/acselectrochem.5c00036 |
| 収録物識別子 |
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収録物識別子タイプ |
PISSN |
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収録物識別子 |
2997-0571 |
| 書誌情報 |
en : ACS Electrochemistry
巻 1,
号 8,
p. 1327-1338,
発行日 2025-08-07
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| ファイル公開日 |
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|
日付 |
2026-08-07 |
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日付タイプ |
Available |
ec-2025-000369.R1_Proof_hi.pdf (2.4 MB)
