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| ファイル | 記述 | サイズ | フォーマット | |
|---|---|---|---|---|
| srep41264.pdf | 1.01 MB | Adobe PDF | 見る/開く |
| タイトル: | Electronic Structure Evolution with Composition Alteration of Rh_xCu_y Alloy Nanoparticles. |
| 著者: | Palina, Natalia Sakata, Osami Kumara, L. S. R. Song, Chulho Sato, Katsutoshi   https://orcid.org/0000-0002-3998-7012 (unconfirmed)Nagaoka, Katsutoshi Komatsu, Tokutaro Kobayashi, Hirokazu Kusada, Kohei  https://orcid.org/0000-0002-9679-6749 (unconfirmed)Kitagawa, Hiroshi https://orcid.org/0000-0001-6955-3015 (unconfirmed) |
| 著者名の別形: | 坂田, 修身 永岡, 勝俊 北川, 宏 |
| 発行日: | 25-Jan-2017 |
| 出版者: | Springer Nature |
| 誌名: | Scientific reports |
| 巻: | 7 |
| 論文番号: | 41264 |
| 抄録: | The change in electronic structure of extremely small Rh[x]Cu[y] alloy nanoparticles (NPs) with composition variation was investigated by core-level (CL) and valence-band (VB) hard X-ray photoelectron spectroscopy. A combination of CL and VB spectra analyses confirmed that intermetallic charge transfer occurs between Rh and Cu. This is an important compensation mechanism that helps to explain the relationship between the catalytic activity and composition of Rh[x]Cu[y] alloy NPs. For monometallic Rh and Rh-rich alloy (Rh[0.77]Cu[0.23]) NPs, the formation of Rh surface oxide with a non-integer oxidation state (Rh((3-δ)+)) resulted in high catalytic activity. Conversely, for alloy NPs with comparable Rh:Cu ratio (Rh[0.53]Cu[0.47] and Rh[0.50]Cu[0.50]), the decreased fraction of catalytically active Rh((3-δ)+) oxide is compensated by charge transfer from Cu to Rh. As a result, ensuring negligible change in the catalytic activities of the NPs with comparable Rh:Cu ratio to those of Rh-rich and monometallic Rh NPs. |
| 記述: | 組成が違っても触媒活性が同等な新規Rh-Cuナノ粒子の電子状態の観測 : 合金の複合的な電子状態が寄与することを示唆. 京都大学プレスリリース. 2017-01-30. |
| 著作権等: | © The Author(s) 2017. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| URI: | http://hdl.handle.net/2433/217913 |
| DOI(出版社版): | 10.1038/srep41264 |
| PubMed ID: | 28120907 |
| 関連リンク: | https://www.kyoto-u.ac.jp/ja/research-news/2017-01-30 |
| 出現コレクション: | 学術雑誌掲載論文等 |
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