A study on the reduction behavior of silica supported iron and platinum-iron catalysts |
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| Authors: | Jifei Jia Jianyi Shen Liwu Lin Zhusheng Xu Tao Zhang and Dongbai Liang |
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| Institution: | (1) Dalian Institute of Chemical Physics, Chinese Academy of Sciences, P.O. Box 110, 116023 Dalian, China;(2) Department of Chemistry, Nanjing University, 210093 Nanjing, China |
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| Abstract: | The reduction behavior of silica supported iron and platinum-iron catalysts were studied by combinedin situ temperature programmed reduction (TPR)-M?ssbauer Spectroscopy (MBS). The results indicated that the TPR profiles of the supported
Fe catalysts were different from that of bulk α-Fe2O3. There existed an interaction between the Pt and Fe metals and the SiO2 support for the Pt−Fe/SiO2 catalyst. On the supported iron-containing catalysts, the Fe3+ species were highly dispersed on the SiO2 supported before reduction. No Fe0 and Fe2+ in octahedral vacancy were found in the reduction of SiO2 supported iron-containing catalysts. Addition of Pt to the Fe/SiO2 catalyst could promote the reduction of the iron species. |
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| Keywords: | Platinum iron in situ-TPR-M?ssbauer spectroscopy |
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