期刊
CATALYSIS LETTERS
卷 145, 期 1, 页码 451-457出版社
SPRINGER
DOI: 10.1007/s10562-014-1448-5
关键词
Oxygen reduction reaction; Pt(111) surface; Microkinetic modeling; Surface chemistry; Heterogeneous catalysis; Kinetic rate modeling
A microkinetic model of the oxygen reduction reaction (ORR) on Pt(111) under a gaseous H-2 and O-2 atmosphere is used to predict and explain which compositions of H-2 and O-2 lead to the fastest rate of water formation for temperatures between 600 and 900 K. For a stoichiometric (2:1) mixture of H-2 and O-2 the rate-determing step is found to transition from O* hydrogenation to O-2* dissociation over this same temperature range. These results are explained in terms of the temperature dependence of the surface coverages of O* and H* and are shown to be consistent with kinetic models aimed at understanding the ORR under electrochemical conditions.
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