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

作者：Takesue Yuki; Nakamura Masashi; Hoshi Nagahiro^*

来源：Physical Chemistry Chemical Physics, 2014, 16(27): 13774-13779.

DOI：10.1039/c4cp00243a

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) j(k), increases linearly with an increase in the step atom density d(S). On the other hand, the activity for the ORR on the n(111)-(100) series increases linearly with an increase of d(S) on the surfaces with n %26gt;= 9. On the surfaces with n %26lt; 9, however, the activity for the ORR decreases with an increase of d(S). We find a correlation between the ORR activity and theta(OH) at the step on the assumption that all the oxide species are Pt-OH.

• 出版日期2014