IMPROVEMENT OF PREFERENTIAL CO OXIDATION ACTIVITY OVER CUO/CO3O4-CEO2 CATALYSTS: EFFECT OF CO/CE RATIO

被引：6
|
作者：
Wang, Rui [1 ]
Chen, Chao [1 ]
Deng, Shengjun [1 ]
Shen, Pan [1 ]
Gong, Lei [1 ,2 ]
Zhang, Ning [1 ]
机构：
[1] Nanchang Univ, Dept Chem, Nanchang 330031, Peoples R China
[2] Jiangxi Agr Univ, Dept Chem, Nanchang 330045, Peoples R China
来源：
JOURNAL OF THE CHILEAN CHEMICAL SOCIETY | 2014年 / 59卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Co/Ce ratio; CuO/Co3O4-CeO2; H-2-rich gases; Preferential oxidation of CO; CARBON-MONOXIDE OXIDATION; H-2 RICH STREAM; H-2-RICH GASES; OXIDE CATALYSTS; MIXED OXIDES; HYDROGEN; CERIA; PLATINUM; OXYGEN; SITES;
D O I：
10.4067/S0717-97072014000400017
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A series of Co3O4-CeO2 supports with different Co/Ce ratio have been synthesized by using polyethyleneglycol (PEG) as a surfactant. The catalytic performance tests indicated the activity of the catalysts is better than the corresponding support. In addition, CuO/(0.7) Co3O4-CeO2 displayed the best activity with 100% CO conversion and 93% O-2 selectivity at 120 degrees C. Furthermore, the stability test of CuO/(0.7)Co3O4-CeO2 expressed the activity can be retained at 80% for 80h at 100 degrees C. Catalysts and supports were characterized by BET, XRD, TPR and TPD techniques. Discussion of the results showed that the strongest lattice distortion and the best reducibility of Co3O4-CeO2 supports were both negative factors for the catalytic activity. More precisely, an appropriate Co/Ce ratio can restrain the stronger interaction between cobalt oxide and ceria to promote the formation of reducible copper species.
引用
收藏
页码：2710 / 2716
页数：7
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