AU/MNOX CATALYTIC PERFORMANCE-CHARACTERISTICS FOR LOW-TEMPERATURE CARBON-MONOXIDE OXIDATION

被引：110

作者：

HOFLUND, GB ^{[1
]}

GARDNER, SD ^{[1
]}

SCHRYER, DR ^{[1
]}

UPCHURCH, BT ^{[1
]}

KIELIN, EJ ^{[1
]}

机构：

[1] NASA, LANGLEY RES CTR, HAMPTON, VA 23665 USA

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 1995年 / 6卷 / 02期

基金：

美国国家科学基金会;

关键词：

CARBON MONOXIDE OXIDATION; GOLD; MNOX; PLATINUM; SNOX;

D O I：

10.1016/0926-3373(95)00010-0

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：

Manganese oxide-supported gold (Au/MnOx) catalysts have been prepared and tested for low-temperature (< 100 degrees) carbon monoxide oxidation in stoichiometric mixtures of carbon monoxide and oxygen containing no carbon dioxide in the feed gas. Even with no pretreatment these catalysts are superior to the best, pretreated platinized tin oxide (Pt/SnOx) catalysts under the conditions tested. The very small decay observed for Au/MnOx catalysts is mostly due to carbon dioxide retention. The optimum gold content has been determined to be 10 at.-% of the manganese content, and a lithium promotor results in improved catalytic behavior over K- or Na-promoted Au/MnOx catalysts for the conditions examined in this study.

引用

页码：117 / 126

页数：10

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