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Citation: HE Sheng-Nan, CUI Ya-Juan, YAO Yan-Ling, FANG Rui-Mei, SHI Zhong-Hua, NG Mao-Chu, CHEN Yao-Qiang. Effects of Alkaline Earth Metal on Performance of ZrO2-Al2O3 Support and Pd-Rh Close-Coupled Catalyst[J]. Acta Physico-Chimica Sinica, ;2011, 27(05): 1157-1162. doi: 10.3866/PKU.WHXB20110509 shu

Effects of Alkaline Earth Metal on Performance of ZrO2-Al2O3 Support and Pd-Rh Close-Coupled Catalyst

  • 1.

    Key Laboratory of Green Chemistry & Technology of the Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China

  • Received Date: 10 January 2011
    Available Online: 30 March 2011

    Fund Project: 国家自然科学基金(20773090, 20803049) (20773090, 20803049)教育部博士点新教师基金(20070610026)资助项目 (20070610026)

  • A series of alumina supports stabilized by alkaline earth metals and zirconia were prepared by the peptizing method. Pd-Rh close-coupled catalysts supported on modified alumina were prepared by the impregnation method. The supports were characterized by low temperature nitrogen adsorption-desorption method, X-ray diffraction (XRD), and NH3-temperature programmed desorption (NH3-TPD). For the catalysts, H2-temperature programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS) were carried out. We also carried out catalytic activity tests for C3H8 conversion. Results show that the addition of alkaline earth metals increases the surface area of the supports and the surface area of Sr-Zr-Al reaches 164 m2·g-1 after calcination at 1000 °C for 5 h. The introduction of alkaline earth metals into the ZrO2-Al2O3 supports also improves their catalytic activity toward propane oxidation and the activities of the Pd-Rh catalysts containing alkaline earth metals are higher than that of the catalyst prepared with a ZrO2-Al2O3 support.

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