Study of RhCo bimetal catalyst .2. Dynamic behavior of the chemisorbed CO and CO disproportionation on Rh+Co/Al2O3

被引：0

作者：

Chen, YQ ^{[1
]}

Gong, MC ^{[1
]}

Cao, Z ^{[1
]}

Zhou, JL ^{[1
]}

Chen, Y ^{[1
]}

Xin, Q ^{[1
]}

Zhang, H ^{[1
]}

Guo, XX ^{[1
]}

机构：

[1] CHINESE ACAD SCI,DALIAN INST CHEM PHYS,DALIAN 116023,PEOPLES R CHINA

来源：

ACTA CHIMICA SINICA | 1996年 / 54卷 / 07期

关键词：

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The forms of adsorption sites, dynamic behavior of chemisorbed CO and CO disproportionation have been investigated by using CO and NO as double probes and TP - IR dynamic method. The results indicate that there are a large amount of adsorption sites for gem dicarbonyl CO and a very small amount of adsorption sites for linear CO on Rh, and Co sites for adsorbed NO over Rh + Co/Al2O3. The bands of gem - dicarbonyl CO gradually decreased in intensity and fully desorbed at 300 degrees C during TPD(in vacuum) dynamic process. The temperature fully desorbed for gem - dicarbonyl CO on Rh + Co/Al2O3 is lower than that for gem - dicarbonyl CO on Rh-4/Al2O3 indicating that addition of Co weaken CO adsorption strength on Rh-I sites over Rh + Co/Al2O3. The results obtained from TP (in CO) dynamic process indicate that CO disproportionation take place above 250 degrees C and the rate of CO disproportionation on Rh-I sites is higher than that on linear sites CO over Rh + Co/Al2O3.

引用

页码：661 / 666

页数：6

共 4 条

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