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Effect of Reduction Treatment on Structural Properties of TiO2 Supported Pt Nanoparticles and Their Catalytic Activity for Benzene Oxidation

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Abstract

A series of highly active Pt–TiO2 catalysts have been prepared by impregnation methods via different reduction processes and used for catalytic decomposition of benzene. The oxidized and reduced Pt–TiO2 catalysts exhibit apparent differences in physical/chemical features (e.g. particle size, chemical state, and electronic property of Pt nanoparticles, and surface oxygen) and catalytic activities for benzene oxidation. Nearly 100 % benzene conversion is achieved on Pt–TiO2 catalysts obtained by the sodium citrate (C6H5Na3O7·2H2O, Na3Ct) reduction at approximate 160 °C. Metallic Pt nanoparticles have strong capacity for oxygen activation, and the negative charges and rich chemisorbed oxygen on the surface of metallic Pt nanoparticles are probably responsible for their high catalytic activities for benzene oxidation.

Graphical Abstract

1 wt% Pt-TiO2 catalysts have been prepared by impregnation methods via different reduction processes and used for catalytic decomposition of benzene. The oxidized and reduced catalysts exhibit apparent differences in physical/chemical features and catalytic activities for benzene oxidation. Metallic Pt nanoparticles have strong capacity for oxygen activation, and the negative charges and rich chemisorbed oxygen on the surface of metallic Pt nanoparticles are probably responsible for their high catalytic activities for benzene oxidation.

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Acknowledgments

The authors gratefully acknowledge the financial supports from the Instrument Developing Project of the Chinese Academy of Sciences.

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Authors and Affiliations

  1. Beijing University of Chemical Technology, Beijing, 100029, People’s Republic of China

    Zenghe Li, Kun Yang, Gaofeng Deng & Ge Li

  2. State Key Laboratory of Multi-phase Complex System, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, People’s Republic of China

    Kun Yang, Gang Liu, Jiaqi Li, Renliang Yue, Jun Yang & Yunfa Chen

  3. University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China

    Gang Liu & Jiaqi Li

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  1. Zenghe Li
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  2. Kun Yang
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  3. Gang Liu
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  4. Gaofeng Deng
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  5. Jiaqi Li
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  6. Ge Li
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  7. Renliang Yue
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  8. Jun Yang
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  9. Yunfa Chen
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Correspondence to Jun Yang or Yunfa Chen.

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Li, Z., Yang, K., Liu, G. et al. Effect of Reduction Treatment on Structural Properties of TiO2 Supported Pt Nanoparticles and Their Catalytic Activity for Benzene Oxidation. Catal Lett 144, 1080–1087 (2014). https://doi.org/10.1007/s10562-014-1245-1

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  • DOI: https://doi.org/10.1007/s10562-014-1245-1

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