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K-edge X-ray absorption fine structure analysis of Pt/Au core-shell electrocatalyst : evidence for short Pt-Pt distance
| Title: | K-edge X-ray absorption fine structure analysis of Pt/Au core-shell electrocatalyst : evidence for short Pt-Pt distance |
| Authors: | Kaito, Takahiro Browse this author | | Mitsumoto, Hisashi Browse this author | | Sugawara, Seiho Browse this author | | Shinohara, Kazuhiko Browse this author | | Uehara, Hiromitsu Browse this author | | Ariga, Hiroko Browse this author | | Takakusagi, Satoru Browse this author →KAKEN DB | | Hatakeyama, Yoshikiyo Browse this author | | Nishikawa, Keiko Browse this author →KAKEN DB | | Asakura, Kiyotaka Browse this author →KAKEN DB |
| Issue Date: | 24-Apr-2014 |
| Publisher: | American Chemical Society |
| Journal Title: | Journal of physical chemistry. C |
| Volume: | 118 |
| Issue: | 16 |
| Start Page: | 8481 |
| End Page: | 8490 |
| Publisher DOI: | 10.1021/jp501607f |
| Abstract: | A carbon-supported Pt-shell Au-core electrocatalyst (Pt/Au/C) was prepared by sequential deposition of Pt ions on the surface of Au nanoparticles supported on carbon. The area-specific activity of the oxygen reduction reaction (ORR) for the prepared Pt/Au/C in 0.1 M HClO4, aqueous solution was approximately 2 times higher than that for a commercial carbon-supported Pt electrocatalyst (Pt/C). The core-shell structure was confirmed using electrochemical methods and Pt and Au K-edge X-ray absorption fine structure (XAFS) analysis. XAFS analyses indicated that the Pt-Pt bond distance for the Pt/Au/C catalyst was shorter than that for Pt foil and the Pt/C catalyst. In addition, the Au Au distance was much shorter than that for Au foil. The reason for the high ORR activity of Pt/Au/C is considered to be shorter Pt-Pt bond distance as compared to that of Pt/C. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/56614 |
| Appears in Collections: | 触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 朝倉 清高
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