REDUCTION AND STATE OF CO IN CO/ZNO CATALYSTS - EVIDENCE OF A METAL SUPPORT INTERACTION

被引：15

作者：

MARTINLUENGO, MA

SERMON, PA

WANG, Y

机构：

[1] Solids and Surfaces Research Group, Department of Chemistry, Brunel University, Uxbridge

来源：

JOURNAL OF CATALYSIS | 1992年 / 135卷 / 01期

关键词：

D O I：

10.1016/0021-9517(92)90284-O

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：

The extent of reduction of Co2+ to Co0 in Co/ZnO and Co/SiO2 catalysts has been ascertained by temperature-programmed reduction, chemisorption, magnetic susceptibility, and activity in propane hydrogenolysis. The results indicate that Co2+ is not fully reduced at 573 K on either ZnO or silica, but that there is a strong CO0Co2+ interaction with ZnO which depresses hydrogen chemisorption and hydrogenolysis activity towards propane; the causes of this are considered. The metal-support interaction causes propane hydrogenolysis to occur at a rate on each hydrogen adsorption site on Co0Cox/ZnO almost 100 times more slowly than on such sites on silica-supported Co. © 1992.

引用

页码：263 / 268

页数：6

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