Investigating effect of pH values on CeSiW catalyst for the selective catalytic reduction of NO by NH3

  • Zhongxian Song
  • Yongmei Fu
  • Ping Ning
  • Hongpan Liu
  • Dong Ren
  • Haiyan KangEmail author
  • Biao Liu
  • Yanli Mao
  • Yifei Guo
  • Qiulin ZhangEmail author


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.


Selective catalytic reduction Silicotungstic acid Pore structures Redox ability Surface acid sites 



This work is supported by the National Natural Science Foundation of China (No. 21307047; No. 51509083), Henan Key Scientific Research Projects (No. 18A610002; No. 16A610005) and Doctoral Research Start-up Project of Henan University of Urban Construction (No. 990/Q2017011).


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© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Henan University of Urban Construction, Henan Province Key Laboratory of Water Pollution Control and Rehabilitation TechnologyPingdingshanPeople’s Republic of China
  2. 2.Faculty of Environmental Science and EngineeringKunming University of Science and TechnologyKunmingPeople’s Republic of China
  3. 3.College of Materials and Chemical EngineeringChongqing University of Arts and SciencesChongqingPeople’s Republic of China
  4. 4.College of Environmental Science and EngineeringChina West Normal UniversityNanchongPeople’s Republic of China

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