High activity in CO oxidation of Ag nanoparticles supported on fumed silica

被引：47

作者：

Afanasev, D. S. ^{[1
]}

Yakovina, O. A. ^{[1
]}

Kuznetsova, N. I. ^{[1
]}

Lisitsyn, A. S. ^{[1
]}

机构：

[1] Boreskov Inst Catalysis SB RAS, Novosibirsk 630090, Russia

来源：

CATALYSIS COMMUNICATIONS | 2012年 / 22卷

关键词：

Ag catalysts; Silica support; Fumed silica; CO oxidation; Catalytic activity; CATALYTIC-OXIDATION; AG/SIO2; CATALYSTS; SILVER CATALYSTS; PRETREATMENT; ADSORPTION; CLUSTERS; OXIDES; OXYGEN;

D O I：

10.1016/j.catcom.2012.02.014

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：

Thermal decomposition of Ag nitrate on fumed silica resulted in catalysts which showed higher efficiency in CO oxidation as compared to the Ag catalysts described in the literature. The catalysts were active at sub-ambient temperatures, ensured complete conversion of CO at temperatures near ambient (specific activities >50 h(-1) per total mass of Ag, 30 degrees C) and remained selective in H-2-containing mixtures. Water vapors in ppm quantities in the feed gave positive effect on catalytic activity. The catalysts were stable during testing for several hours and could be reactivated after long-term testing with a full retention of activity. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：43 / 47

页数：5

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