nanocomposite electrocatalyst; An in situ electrochemical X-ray absorption fine structure studyナノ複合触媒上での酸素還元反応に関するCeOの役割に関する研究増田 卓也*; 福満 仁志*; 府金 慶介*; 戸ヶ崎 寛孝*; 松村 大樹 
; 田村 和久 ; 西畑 保雄; 吉川 英樹*; 小林 啓介*; 森 利之*; 魚崎 浩平*
Masuda, Takuya*; Fukumitsu, Hitoshi*; Fugane, Keisuke*; Togasaki, Hirotaka*; Matsumura, Daiju; Tamura, Kazuhisa; Nishihata, Yasuo; Yoshikawa, Hideki*; Kobayashi, Keisuke*; Mori, Toshiyuki*; Uosaki, Kohei*
Pt-CeO/C触媒上での酸素還元反応におけるCeOの役割をXAFS法を用い調べた。その結果、CeO中のCe
がCe
になることによりPt酸化物生成が抑制されることがわかった。
In situ electrochemical X-ray absorption fine structure (XAFS) measurements were performed at the Pt L
and Ce L edges of the Pt-CeO/C catalyst, which was prepared by a combined process of precipitation and coimpregnation methods, as well as at the Pt L edge of the conventional Pt/C catalyst in oxygen-saturated H
SO
solution to clarify the role of CeO in the reduction of the overpotential for the oxygen reduction reaction (ORR) at the Pt-CeO 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 CeO layer, of which Ce was oxidized to Ce instead of Pt at the Pt oxide formation potential.
発表言語 |
: | English |
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巻 |
: | 116 |
号 |
: | 18 |
ページ数 |
: | p.10098 - 10102 |
発行年月 |
: | 2012/05 |
キーワード |
: | no keyword |
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論文解説記事 |
: | 燃料電池を高効率化する「助触媒」の役割を解明; 酸化セリウムが白金酸化物形成の抑制に寄与[ |
Access |
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- Accesses |
|---|---|---|
InCites™ |
: |
パーセンタイル：93.64 分野：Chemistry, Physical |
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