Issue 27, 2014

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

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

Article information

Article type
Paper
Submitted
17 tammi 2014
Accepted
31 maalis 2014
First published
31 maalis 2014

Phys. Chem. Chem. Phys., 2014,16, 13774-13779

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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