CO OXIDATION OVER PD/SNO2 CATALYST

被引：47

作者：

GADGIL, MM ^{[1
]}

SASIKALA, R ^{[1
]}

KULSHRESHTHA, SK ^{[1
]}

机构：

[1] BHABHA ATOM RES CTR,DIV CHEM,BOMBAY 400085,INDIA

来源：

JOURNAL OF MOLECULAR CATALYSIS | 1994年 / 87卷 / 2-3期

关键词：

CARBON MONOXIDE; OXIDATION; PALLADIUM; STANNIA; SUPPORTED CATALYST;

D O I：

10.1016/0304-5102(93)E0229-A

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：

Oxidation of CO over the surface of SnO2 and Pd/SnO2 catalysts has been investigated with a view to understand the role of Pd metal particles which are known to improve the catalytic activity. The reaction occurs through the incorporation of lattice oxygen and an oxidized surface of the catalyst facilitates the CO oxidation. For Pd/SnO2 Significant CO oxidation occurs even at room temperature as monitored by CO pulse injection technique. Disproportionation of CO into CO2 and carbon has been observed in the region 350 K less-than-or-equal-to T less-than-or-equal-to 425 K. From Sn-119 Mossbauer investigations the existence of Sn2+ species in the support matrix has been observed and its extent is affected by Pd incorporation. The effect of oxygen and/or hydrogen pretreatment of Pd/SnO2 catalyst at different temperatures on its catalytic activity has been discussed.

引用

页码：297 / 309

页数：13

共 30 条

[1] PALLADIUM-CATALYZED CARBON MONOXIDE OXIDATION - CATALYST BREAK-IN PHENOMENON [J].