期刊
CATALYSIS TODAY
卷 164, 期 1, 页码 186-189出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2010.10.030
关键词
Pt nanoparticle; Sulfur; Stability; Oxygen reduction; Strong metal-support interaction; Ordered mesoporous carbon
Pt nanoparticles on sulfur-containing ordered mesoporous carbon (Pt/S-OMC) are obtained with 3 nm in size and 60 wt.% loading. XPS analysis shows that there is a strong metal-support interaction between Pt nanoparticles and S atoms embedded on the OMC support. This strong metal-support interaction fastens Pt nanoparticles upon the support and alters the electronic state of Pt from Pt(0) of bulk Pt to a slightly charged state of Pt(delta+). These features result in an improvement both in electrochemical stability and oxygen reduction reaction kinetics compared to Pt/OMC where the OMC does not have sulfur atoms. The approach of tuning the electronic state and the interaction of Pt on carbon supports by embedding heterogeneous atoms into the OMC can effectively improve the stability and catalytic activity of Pt nanoparticles. (C) 2010 Elsevier B.V. All rights reserved.
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