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Citation: HE Xiang-E, YANG Le-Fu, SHI Chun-Kai, HU Yu-Xiang, CAI Jun-Xiu. Effect of the Addition of ZrO₂ on the Structure and Property of Pd/Al₂O₃ Catalyst[J]. Chinese Journal of Applied Chemistry, ;2003, 20(10): 924-927. shu

Effect of the Addition of ZrO₂ on the Structure and Property of Pd/Al₂O₃ Catalyst

HE Xiang-E ^a ,
YANG Le-Fu ^a,b,, ,
SHI Chun-Kai ^a ,
HU Yu-Xiang ^a ,
CAI Jun-Xiu ^b,c

1.
a Department of Chemistry;
2.
b State Key Laboratory of Physical Chemistry of the Solid Surface;
3.
c Institute of Physical Chemistry, Xiamen University, Xiamen 361005

Corresponding author: YANG Le-Fu,
Received Date: 20 February 2003
Available Online: 3 June 2003
Fund Project: 科技部"九七三"项目(G1999022400) (G1999022400)国家自然科学基金资助项目(20203014) (20203014)

Palladium catalysts supported on mixed oxides(Pd/nZrO₂-mAl₂O₃) were prepared by copre cipitation and their activities have been examined in catalytic combustion reaction of methane. It was found that the catalyst with n:m=1:5.8 has the highest activity. XRD study revealed that introduction of ZrO₂ affects the surface composition and structure of the catalyst, and the catalyst has good activity when ZrO₂ is in monclinic phase and has gross porosity. O₂-TPD experiments indicated that an appropriate amount of ZrO₂ in the com-posite favors the interaction between carrier and noble metal, leading to the formation of a large amount of PdO_x active species and increase of catalystic activity in CH₄ oxidation reaction.
- Pd-supported catalyst,
- mixed Zr/Al oxide,
- catalytic combustion
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Effect of the Addition of ZrO₂ on the Structure and Property of Pd/Al₂O₃ Catalyst