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