Surface structure effects in nanocrystal MnO2 and Ag/MnO2 catalytic oxidation of CO

被引：251

作者：

Xu, R

Wang, X

Wang, DS

Zhou, KB

Li, YD ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

[2] Tsinghua Univ, Key Lab Atom & Mol Nanosci, Minist Educ China, Beijing 100084, Peoples R China

来源：

JOURNAL OF CATALYSIS | 2006年 / 237卷 / 02期

基金：

中国国家自然科学基金;

关键词：

MnO2; nanocrystal; controlled-synthesis; crystal phase; CO oxidation;

D O I：

10.1016/j.jcat.2005.10.026

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：

Pure-phase alpha-MnO2 and beta-MnO2 nanowires/nanorods were synthesized through an easy solution-based hydrothermal method, and the effect of the manganese dioxide phase on the activity of MnO2 and Ag/MnO2 for the oxidation of CO was investigated. MnO2 is an effective catalyst in CO oxidation, and its activity depends on the crystal phase of MnO2. alpha-MnO2 exhibits a higher activity than beta-MnO2, because the alpha-MnO2 nanowires can be reduced more easily than the beta-MnO2 nanorods. Moreover, when Ag was introduced to MnO2, a strong interaction Occurred between Ag and MnO2. The catalytic activity clearly correlates with this interaction, which is determined by crystal phase and surface structure. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：426 / 430

页数：5

共 30 条

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