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Citation: Ruimei Fang, Yajuan Cui, Sijie Chen, Hongyan Shang, Zhonghua Shi, Maochu Gong, Yaoqiang Chen. A highly efficient Rh-modified Pd/Al2O3 close-coupled catalyst[J]. Chinese Journal of Catalysis, ;2015, 36(2): 229-236. doi: 10.1016/S1872-2067(14)60214-X shu

A highly efficient Rh-modified Pd/Al2O3 close-coupled catalyst

  • 1.

    a College of Chemical Engineering, Sichuan University, Chengdu 610064, Sichuan, China;

  • Corresponding author: Zhonghua Shi,  Yaoqiang Chen, 
  • Received Date: 6 July 2014
    Available Online: 26 August 2014

    Fund Project: 国家自然科学基金(21173153) (21173153) 国家高技术研究发展计划(863计划, 2013AA065304) (863计划, 2013AA065304) 四川省科技厅科技支撑项目(2011GZ0035, 2012FZ0008). (2011GZ0035, 2012FZ0008)

  • The close-coupled catalysts Pd/Al2O3 and Rh-Pd/Al2O3 were prepared by the impregnation method and characterized by H2 temperature-programmed reduction, CO chemisorption, and X-ray photoelectron spectroscopy. Both overall catalytic activity and specific reactions associated with C3H8 elimination were assessed. The light-off temperature and complete conversion temperature decreased by 23 and 18 ℃, respectively, upon addition of Rh to the Pd/Al2O3 catalyst. The addition of Rh promotes the catalytic activity during C3H8 reactions, particularly in the presence of NO. The introduction of Rh not only inhibits sintering of PdOx and increases the dispersion of these same species, but also changes the electronic state of the PdOx in the catalyst.
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