期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 17, 页码 15322-15327出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b03579
关键词
heterogeneous catalysis; CO oxidation; facets matching; catalyst design; surface adsorption
资金
- Thousand Talents Program for Distinguished Young Scholars from Chinese government
- National Key R&D Program of China [2017YFB0406000]
- National Science Foundation of China [51521004, 51420105009]
- Shanghai Jiao Tong University
- Shanghai Sailing Program [16YE1406000]
- Youth Innovation Promotion Association of Chinese Academy of Sciences [2015141]
Rational design of supported noble metal is of great importance for highly efficient heterogeneous catalysts. On the basis of the distinct adsorption characteristics of noble metal and transition-metal oxides toward O-2 and CO, the overall catalytic performance of CO oxidation reaction could be further modified by controlling the surface property of the materials to achieve optimal adsorption activity. Here, we studied the influence of facets matching between both platinum and ferric oxide support on CO conversion efficiency. It shows that the activities of four catalysts rank following the order of Pt{100}/alpha-Fe2O3{104} > Pt{100}/alpha-Fe2O3{001} > Pt{111}/alpha-Fe2O3{001} > Pt{111}/alpha-Fe2O3{104}. The strong metal support interaction and adsorption energy varying with matched enclosed surface are demonstrated by density functional theory based on the projected d-band density of states. Compared with the other three cases, the combination of Pt{100} and alpha-Fe2O3{104} successfully weakens CO poisoning and provides proper active sites for O-2 adsorption. It reveals that the facets matching could be a practicable approach to design catalysts with enhanced catalytic performance.
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