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Surface coordinate geometry of iron catalysts: hydrogenation of CO2 over Fe/ZrO2 prepared by a novel method

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Abstract

Zirconia-supported iron oxide catalyst has been designed following the approach to the Fe/TiO2 catalyst. The catalyst prepared by reducing the precursor obtained from incipient wetness impregnation in H2 at the proper temperature exhibits good activity (CO2 conversion >20%) and selectivity (68%) in the selective synthesis of hydrocarbons (C2-C5) from CO2 and H2. The catalytic activity has been found to vary with iron weight loadings in a “two maxima” fashion and is also affected by reduction temperature. Mössbauer and EXAFS analyses suggest that the active phases are coordinatively unsaturated ferric cations and α-Fe. No ferrous cations are observed. A good geometric arrangement for the two phases on the catalyst is thought to give the highest catalytic activity.

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Authors and Affiliations

  1. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 730000, Lanzhou, PR China

    Yuan Kou, Zhang-huai Suo, Jian-zhong Niu, Wen-zhong Zhang & Hong-li Wang

  2. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, PR China

    Hong-li Wang

Authors
  1. Yuan Kou
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  2. Zhang-huai Suo
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  3. Jian-zhong Niu
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  4. Wen-zhong Zhang
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  5. Hong-li Wang
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Kou, Y., Suo, Zh., Niu, Jz. et al. Surface coordinate geometry of iron catalysts: hydrogenation of CO2 over Fe/ZrO2 prepared by a novel method. Catal Lett 35, 271–277 (1995). https://doi.org/10.1007/BF00807183

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  • DOI: https://doi.org/10.1007/BF00807183

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