Chemical Research in Chinese Universities ›› 2013, Vol. 29 ›› Issue (5): 952-955.doi: 10.1007/s40242-013-3135-2

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Influence of Electronic Effect on Methane Catalytic Combustion over PdNi/Al2O3

PAN Xi-qiang1,2, ZHANG Yi-bo1,2, ZHANG Bin1,2, MIAO Zhen-zhen1,2, WU Tian-xiao1,2, YANG Xiang-guang1   

  1. 1. Laboratory of Green Chemistry and Process, Changchun Institute of Applied Chemistry, Chinese Academemy of Sciences, Changchun 130022, P. R. China;
    2. University of Chinese Academy of Sciences, Beijing 100049, P. R. China
  • Received:2013-03-22 Revised:2013-04-17 Online:2013-10-01 Published:2013-09-17
  • Contact: YANG Xiang-guang E-mail:xgyang@ciac.ac.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.21273221) and the National High Technology Research and Development Program of China(No.2011AA03A406).

Abstract:

A series of PdNi/Al2O3 catalysts with different compositions was prepared by co-reduction method. The influence of Ni amount on the catalytic combustion of methane was studied. X-ray diffractometry and X-ray photo-electron spectroscopy were employed to characterize the dispersion and electronic state of the active phase. Tempe-rature-programmed oxidation was carried out to study the thermal stability affected by Ni doping. It has been demonstrated that Ni addition changed particle size and oxidation state of PdOx. The results indicate that the promotion of Ni to the Pd/Al2O3 resulted from both size effect and electronic effect. In addition, the thermal stability of the Ni-doped catalysts were enhanced.

Key words: Methane combustion, Palladium, Nickel, Size effect, Electronic effect