期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 2, 期 2, 页码 67-72出版社
AMER CHEMICAL SOC
DOI: 10.1021/jz1015789
关键词
-
类别
资金
- Office of Science of the Department of Energy [DE-AC05-00OR22725]
- National Science Foundation [CBET-0709113]
The increase in oxygen binding energy was previously proposed to account for the lower oxygen reduction activity of a Pt monolayer supported on Au(111) single crystal than that on Pd(111) and pure Pt(111) surfaces. This single-crystal based understanding, however, cannot explain the new finding of a 1, 6-fold increase of oxygen reduction activity on Pt monolayer-modified 3-nm Au-nanoparticles (Pt/Au/C) in comparison with that on Pt/Pd/C with a similar particle size. The Pt/Au/C catalyst also has an activity higher than that of a state-of-the-art 2.8-nm Pt/C catalyst. Our new experimental results and density functional theory calculations demonstrate that a significant compressive strain in the surface of the core nanoparticles plays a role in the observed activity enhancement.
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