Quantitating the Lattice Strain Dependence of Monolayer Pt Shell Activity toward Oxygen Reduction
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- 作者：Xiaoming Wang ; Yuki Orikasa ; Yuki Takesue ; Hideo Inoue ; Masashi Nakamura ; Taketoshi Minato ; Nagahiro Hoshi ; Yoshiharu Uchimoto
- 刊名：The Journal of the American Chemical Society
- 出版年：2013
- 出版时间：April 24, 2013
- 年：2013
- 卷：135
- 期：16
- 页码：5938-5941
- 全文大小：225K
- 年卷期：v.135,no.16(April 24, 2013)
- ISSN：1520-5126
文摘
Lattice strain of Pt-based catalysts reflecting d-band status is the decisive factor of their catalytic activity toward oxygen reduction reaction (ORR). For the newly arisen monolayer Pt system, however, no general strategy to isolate the lattice strain has been achieved due to the short-range ordering structure of monolayer Pt shells on different facets of core nanoparticles. Herein, based on the extended X-ray absorption fine structure of monolayer Pt atoms on various single crystal facets, we propose an effective methodology for evaluating the lattice strain of monolayer Pt shells on core nanoparticles. The quantitative lattice strain establishes a direct correlation to monolayer Pt shell ORR activity.