CO and C3H8 Total Oxidation over Pd Catalysts Supported on Commercial Ce-Zr Solid Solution: Effects of the Calcination Temperature and Hydrothermal Treatment

doi:10.1007/s40242-015-4326-9

高等学校化学研究 ›› 2015, Vol. 31 ›› Issue (2): 288-293.doi: 10.1007/s40242-015-4326-9

CO and C₃H₈ Total Oxidation over Pd Catalysts Supported on Commercial Ce-Zr Solid Solution: Effects of the Calcination Temperature and Hydrothermal Treatment

ZHOU Renmei, ZHANG Xuanyu, LU Jiqing, HU Gengshen, LUO Mengfei

Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, P. R. China

收稿日期:2014-08-29 修回日期:2014-09-30 出版日期:2015-04-01 发布日期:2014-10-27
通讯作者: LUO Mengfei E-mail:mengfeiluo@zjnu.cn
基金资助:
Supported by the Public Welfare Technology Applied Research Program of Zhejiang Province, China(No.2013C31049) and the Science and Technology Innovation Program Project of Zhejiang Province, China(No.2014R404071).

CO and C₃H₈ Total Oxidation over Pd Catalysts Supported on Commercial Ce-Zr Solid Solution: Effects of the Calcination Temperature and Hydrothermal Treatment

ZHOU Renmei, ZHANG Xuanyu, LU Jiqing, HU Gengshen, LUO Mengfei

Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, P. R. China

Received:2014-08-29 Revised:2014-09-30 Online:2015-04-01 Published:2014-10-27
Contact: LUO Mengfei E-mail:mengfeiluo@zjnu.cn
Supported by:
Supported by the Public Welfare Technology Applied Research Program of Zhejiang Province, China(No.2013C31049) and the Science and Technology Innovation Program Project of Zhejiang Province, China(No.2014R404071).

摘要/Abstract

摘要：

A series of Pd catalysts supported on commercial Ce-Zr solid solution(Pd/CZ) calcined at different temperatures(750, 900 and 1050 ℃) was prepared via an incipient wetness impregnation method. The activities of the fresh and hydrothermally aged Pd/CZ catalysts were tested for total oxidation of CO and C₃H₈. For CO oxidation, the activity of either fresh or aged Pd/CZ catalysts decreased with the elevating of calcination temperature of CZ support, with a fresh catalyst calcined at 750 ℃ possessing the highest activity and hydrothermal stability. For C₃H₈ total oxidation, the activity of Pd/CZ catalysts could be improved by increasing the calcination temperature of support. However, the aged Pd/CZ catalysts showed higher activity than corresponding fresh Pd/CZ catalysts. The turnover frequency(TOF) over Pd/CZ catalyst for CO oxidation increased with increasing reduction ability of the catalysts, with a fresh catalyst calcined at 750 ℃ having the highest value(0.27 s^-1). However, the TOF of Pd/CZ catalyst for C₃H₈ total oxidation was mainly affected by the size of Pd particles, and large Pd particles possessed a higher activity, with the highest TOF value(0.96 s^-1) obtained over an aged catalyst calcined at 1050 ℃.

关键词: Pd/Ce-Zr catalyst, Stability, Turnover frequency, Hydrothermal aging

Abstract:

Key words: Pd/Ce-Zr catalyst, Stability, Turnover frequency, Hydrothermal aging

ZHOU Renmei, ZHANG Xuanyu, LU Jiqing, HU Gengshen, LUO Mengfei. CO and C₃H₈ Total Oxidation over Pd Catalysts Supported on Commercial Ce-Zr Solid Solution: Effects of the Calcination Temperature and Hydrothermal Treatment[J]. 高等学校化学研究, 2015, 31(2): 288-293.

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CO and C₃H₈ Total Oxidation over Pd Catalysts Supported on Commercial Ce-Zr Solid Solution: Effects of the Calcination Temperature and Hydrothermal Treatment

CO and C₃H₈ Total Oxidation over Pd Catalysts Supported on Commercial Ce-Zr Solid Solution: Effects of the Calcination Temperature and Hydrothermal Treatment

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