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Citation: Fu Jin-Kun, Liu Yue-Ying, Hu Rong-Zong, Zeng Jin-Long, Xu Pian-Pian, Lin Zhong-Yu, Yao Bing-Xin, Weng Cheng-Zhou. Preparation of Highly Dispersive Supported ld Catalyst by Microbial Reduction Method[J]. Acta Physico-Chimica Sinica, ;1998, 14(09): 769-771. doi: 10.3866/PKU.WHXB19980901 shu

Preparation of Highly Dispersive Supported ld Catalyst by Microbial Reduction Method

1.
Department of Chemistry,State Key Laboratory for Physical Chemistry of the Solid Suurface,Department of Biology,Xiamen University,Xiamen 361005

Received Date: 27 May 1998
Available Online: 15 September 1998

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 od 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 ℃.
- Reduction of Au³⁺ by bacteria,
- ld catalyst,
- CO oxidation
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