Acta Phys. -Chim. Sin. ›› 1998, Vol. 14 ›› Issue (09): 769-771.doi: 10.3866/PKU.WHXB19980901

• Communication •     Next Articles

Preparation of Highly Dispersive Supported Gold Catalyst by Microbial Reduction Method

Fu Jin-Kun, Liu Yue-Ying, Hu Rong-Zong, Zeng Jin-Long, Xu Pian-Pian, Lin Zhong-Yu, Yao Bing-Xin, Weng Cheng-Zhou   

  1. Department of Chemistry,State Key Laboratory for Physical Chemistry of the Solid Suurface,Department of Biology,Xiamen University,Xiamen 361005
  • Received:1998-05-27 Revised:1998-07-02 Published:1998-09-15
  • Contact: Fu Jin-Kun

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Abstract:

After widely screening, a kind of bacteria was obtained, which is easy to culture and has strong ability of reducing Au3+ to Au0. It was used to prepare the highly dispersive Au/a-Fe2O3catalyst by in situ reducing the Au3+ ions impregnated on α-Fe2O3 supporter to Au0 particles, with a mean size of 5 nm, under the condition of 28℃ and pH 4.5. The reductive degree ofAu3+ was up to 100%. This catalyst showed good catalytic property for the oxidation of carbon monoxide, the percent conversion of 1.5% CO, balanced with air was up to 100% under the condition of 2528℃and GHSV 500mL•h-1•g-1, and the percent conversion of 100% lasted for 75 h at 25 ℃.

Key words: Reduction of Au3+ by bacteria, Gold catalyst, CO oxidation