Strong rhodium-niobia interaction in Rh/Nb2O5, Nb2O5-Rh/SiO2 and RhNbO4/SiO2 catalysts -: Application to selective CO oxidation and CO hydrogenation

被引:60
作者
Ito, S [1 ]
Fujimori, T [1 ]
Nagashima, K [1 ]
Yuzaki, K [1 ]
Kunimori, K [1 ]
机构
[1] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, Japan
关键词
Rh-niobia interaction; SMSI; SMOI; CO oxidation; CO hydrogenation;
D O I
10.1016/S0920-5861(99)00333-8
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The extent of Rh-niobia interaction in niobia-supported Rh (Rh/Nb2O5), niobia-promoted Rh/SiO2 (Nb2O5-Rh/SiO2) and RhNbO4/SiO2 catalyst after H-2 reduction has been investigated by H-2 and CO chemisorption measurements. These catalysts have been applied to selective CO oxidation in Hz (CO+H-2+O-2) and CO hydrogenation (CO+H-2), and the results are compared with those of unpromoted Rh/SiO2 catalysts. It has been found that niobia (NbOx) increases the activity and selectivity for both the reactions. (C)2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:247 / 254
页数:8
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