Ferric Oxide-Supported Pt Subnano Clusters for Preferential Oxidation of CO in H2-Rich Gas at Room Temperature

被引：105

作者：

Qiao, Botao ^{[1
,2
]}

Wang, Aiqin ^{[1
]}

Li, Lin ^{[1
]}

Lin, Qingquan ^{[1
]}

Wei, Haisheng ^{[1
]}

Liu, Jingyue ^{[2
]}

Zhang, Tao ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

[2] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA

来源：

ACS CATALYSIS | 2014年 / 4卷 / 07期

关键词：

cluster; preferential oxidation; CO; Pt; iron oxide; CARBON-MONOXIDE; SELECTIVE OXIDATION; CATALYSTS; HYDROGEN; NANOPARTICLES; REMOVAL; FE; PT/GAMMA-AL2O3; MECHANISM; H-2;

D O I：

10.1021/cs500501u

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Pt single atoms and small clusters were dispersed on iron oxides by a facile coprecipitation method. These catalysts, with or without calcination at elevated temperatures, show excellent activity and selectivity for preferential oxidation of CO in the H-2-rich gas. They can completely remove CO from H-2-rich gas at a wide temperature range of 20-70 degrees C, which renders them suitable for low-temperature applications. The reaction followed a mixture of competitive mechanism and a noncompetitive/redox mechanism. The weakened CO adsorption on small Pt clusters and atoms makes the competitive adsorption of O-2 feasible, which ensures a high activity of Pt/Fe catalysts, even calcined at elevated temperature.

引用

页码：2113 / 2117

页数：5

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