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

Masuda, Takuya; Fukumitsu, Hitoshi; Fugane, Keisuke; Togasaki, Hirotaka; Matsumura, Daiju; Tamura, Kazuhisa; Nishihata, Yasuo; Yoshikawa, Hideki; Kobayashi, Keisuke; Mori, Toshiyuki; Uosaki, Kohei

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

Masuda, Takuya; Fukumitsu, Hitoshi; Fugane, Keisuke et al.

Journal of Physical Chemistry C, 2012, 116(18), 10098-10102

Permalink : https://hdl.handle.net/2115/50204

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アクセス権	open access
URI	https://hdl.handle.net/2115/50204
タイトル	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
著者	Masuda, Takuya ; Fukumitsu, Hitoshi ; Fugane, Keisuke ; Togasaki, Hirotaka ; Matsumura, Daiju ; Tamura, Kazuhisa ; Nishihata, Yasuo ; Yoshikawa, Hideki ; Kobayashi, Keisuke ; Mori, Toshiyuki ; Uosaki, Kohei
著者名 Masuda, Takuya
著者名 Fukumitsu, Hitoshi
著者名 Fugane, Keisuke
著者名 Togasaki, Hirotaka
著者名 Matsumura, Daiju
著者名 Tamura, Kazuhisa
著者名 Nishihata, Yasuo
著者名 Yoshikawa, Hideki
著者名 Kobayashi, Keisuke
著者名 Mori, Toshiyuki
e-Rad_Researcher 20133697 著者名 Uosaki, Kohei
言語	英語
発行日	2012-05-10
出版者	American Chemical Society
収録物名	Journal of Physical Chemistry C
巻(号)	116(18)
ページ	10098-10102
抄録	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.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
PISSN	1932-7447
EISSN	1932-7455
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1021/jp301509t