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Issue 27, 2014
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Structural effects on the oxygen reduction reaction on the high index planes of Pt3Co

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Abstract

The oxygen reduction reaction (ORR) has been studied on the n(111)–(111) and n(111)–(100) series of Pt3Co using a hanging meniscus rotating disk electrode (HMRDE) in 0.1 M HClO4 (n is the number of terrace atomic rows). The activity for the ORR on the n(111)–(111) series, which is estimated by the specific activity at 0.90 V (RHE) jk, increases linearly with an increase in the step atom density dS. On the other hand, the activity for the ORR on the n(111)–(100) series increases linearly with an increase of dS on the surfaces with n ≥ 9. On the surfaces with n < 9, however, the activity for the ORR decreases with an increase of dS. We find a correlation between the ORR activity and θOH at the step on the assumption that all the oxide species are Pt–OH.

Graphical abstract: Structural effects on the oxygen reduction reaction on the high index planes of Pt3Co

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Article information


Submitted
17 Jan 2014
Accepted
31 Mar 2014
First published
31 Mar 2014

Phys. Chem. Chem. Phys., 2014,16, 13774-13779
Article type
Paper

Structural effects on the oxygen reduction reaction on the high index planes of Pt3Co

Y. Takesue, M. Nakamura and N. Hoshi, Phys. Chem. Chem. Phys., 2014, 16, 13774
DOI: 10.1039/C4CP00243A

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