Ceria modified three-dimensionally ordered macro-porous Pt/TiO2 catalysts for water-gas shift reaction |
| |
Authors: | LIANG Hao ZHANG Yuan LIU Yuan |
| |
Affiliation: | Tianjin Key Laboratory of Applied Catalysis Science and Engineering, Department of Catalysis Science and Technology, School of Chemical Engineering and Technol-ogy, Tianjin University, Tianjin 300072, China |
| |
Abstract: | Three-dimensionally ordered macro-porous(3DOM) TiO2 and ceria-modified 3DOM TiO2 supported platinum catalysts were pre-pared with template and impregnation methods, and the resultant samples were characterized by scanning electron microscopy(SEM), X-ray dif-fractometer(XRD), high-resolution transmission electron microscopy(HRTEM) and texture programmed reduction(TPR) techniques. The catalytic performances over the platinum-based catalysts were investigated for water-gas shift (WGS) reaction in a wide temperature range macro-porous catalyst, owing to the macro-porous structure favoring mass uansfer. Addition of ceria into 3DOM Pt/TiO2 led to improvement of catalytic activity. TPR and HRTEM results showed that the interaction existed between ceria and titanium oxide and addition of ceria promoted the reducibility of platinum oxide and TiO2 on the interface of platinum and TiO2 particles, which contributed to high activity of the ceria modi-fied catalysts. The results indicated that ceria-modified 3DOM Pt/TiO2 was a promising candidate of fuel cell oriented WGS catalyst. |
| |
Keywords: | three dimensionally ordered ceria macro-porous water gas shift platinum rare earths |
本文献已被 维普 万方数据 ScienceDirect 等数据库收录! |
|