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Hokkaido University Collection of Scholarly and Academic Papers >
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Role of Cerium Oxide in the Enhancement of Activity for the Oxygen Reduction Reaction at Pt–CeOx Nanocomposite Electrocatalyst : An in Situ Electrochemical X-ray Absorption Fine Structure Study
| Title: | Role of Cerium Oxide in the Enhancement of Activity for the Oxygen Reduction Reaction at Pt–CeOx Nanocomposite Electrocatalyst : An in Situ Electrochemical X-ray Absorption Fine Structure Study |
| Authors: | Masuda, Takuya Browse this author | | Fukumitsu, Hitoshi Browse this author | | Fugane, Keisuke Browse this author | | Togasaki, Hirotaka Browse this author | | Matsumura, Daiju Browse this author | | Tamura, Kazuhisa Browse this author | | Nishihata, Yasuo Browse this author | | Yoshikawa, Hideki Browse this author | | Kobayashi, Keisuke Browse this author | | Mori, Toshiyuki Browse this author | | Uosaki, Kohei Browse this author →KAKEN DB |
| Issue Date: | 10-May-2012 |
| Publisher: | American Chemical Society |
| Journal Title: | Journal of Physical Chemistry C |
| Volume: | 116 |
| Issue: | 18 |
| Start Page: | 10098 |
| End Page: | 10102 |
| Publisher DOI: | 10.1021/jp301509t |
| Abstract: | In situ electrochemical X-ray absorption fine structure (XAFS) measurements were performed at the Pt L3 and Ce L3 edges of the Pt-CeOx/C catalyst, which was prepared by a combined process of precipitation and coimpregnation methods, as well as at the Pt L3 edge of the conventional Pt/C catalyst in oxygen-saturated H2SO4 solution to clarify the role of CeOx in the reduction of the overpotential for the oxygen reduction reaction (ORR) at the Pt-CeOx nanocomposite compared with the conventional Pt/C catalyst. XAFS measurements clearly show that the enhancement of ORR activity is attributed to the inhibition of Pt oxide formation by the CeOx layer, of which Ce3+ was oxidized to Ce4+ instead of Pt at the Pt oxide formation potential. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/50204 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 魚崎 浩平
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