1. Investigating effect of pH values on CeSiW catalyst for the selective catalytic reduction of NO by NH3
- Author
-
Dong Ren, Biao Liu, Qiulin Zhang, Yanli Mao, Guo Yifei, Ping Ning, Hongpan Liu, Haiyan Kang, Zhongxian Song, and Fu Yongmei
- Subjects
inorganic chemicals ,010405 organic chemistry ,Chemistry ,Abundance (chemistry) ,Inorganic chemistry ,Selective catalytic reduction ,General Chemistry ,Silicotungstic acid ,010402 general chemistry ,01 natural sciences ,Redox ,0104 chemical sciences ,Catalysis ,chemistry.chemical_compound ,NOx - Abstract
The effect of different pH values (8, 9, 10 and 11) on the catalytic activity over CeSiW catalysts was investigated for the selective catalytic reduction of NO by NH3. CeSiW-9 showed a remarkable higher NOx conversion. The strongest interaction was observed between silicotungstic acid and CeO2 over CeSiW-9, resulting in the improvement of redox ability and surface acidity, which could increase the catalytic activity. The superior catalytic performance of the CeSiW-9 catalyst was attributed to the favored pore structures, excellent redox ability and the abundance of surface acid sites, which depended on pH values in the preparation process of CeSiW catalysts.
- Published
- 2019