期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 113, 期 29, 页码 12625-12628出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp904278b
关键词
-
资金
- New Energy Development Organization
Active sites for the oxygen reduction reaction (ORR) have been studied on the low index planes, n(100)(111) and n(100)-(110) series of Pd with the use of hanging meniscus rotating disk electrode (RDE) in 0.1 M HClO4 saturated with O-2. The Kotekey-Levich plots give a linear line with a slope of about 4, showing four electron reduction for the ORR on Pd electrodes, as is the case of Pt. Activity of ORR, which is estimated by the reduction current density at 0.90 V (RHE) j(ORR.0.90V), gives the following order on the low index planes: Pd(110) - Pd(111) < Pd(100). This order is completely opposite to that of Pt in 0.1 M HClO4: Pt(100) < Pt(111) < Pt(110). Specific activity of Pd(100) is nearly three times as high as that of Pt(110) at 0.90 V (RHE). The values of j(ORR,) (0.90) (V) increase linearly with the increase of the terrace atom density on n(100)-(111) and n(100)-(110) series of Pd. This fact supports that (100) structure is the active site for ORR on Pd. ORR activity does not depend on the step structure of n(100)-(111) and n(100)-(110) series.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据