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Highly Active CeO2 Nanocatalysts for Low-Temperature CO Oxidation

  • CHEMICAL KINETICS AND CATALYSIS
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Abstract

Ceria (CeO2) nanocatalysts were synthesized by three different methods via a simple sol–gel method (SGM), precipitation method (PPM), and solution combustion method (SCM) for CO oxidation reaction. The results show that the CeO2 catalysts prepared by SGM possess small crystallite size (9 nm), more lattice defects (active sites), high specific surface area (188 m2 g–1), and better thermal stability. Raman spectra showed that large number oxygen vacancies were possessed by CeO2-SGM catalysts as compared to CeO2-PPM and CeO2-SCM. It was observed that the catalytic activity for CO oxidation reaction is greatly influenced by the preparation method. The order of activity and stability of CeO2 material prepared by different methods for CO oxidation process is as follows: CeO2-SGM > CeO2-PPM > CeO2-SCM, respectively.

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ACKNOWLEDGMENTS

The authors acknowledge the grant under FRGS from GGSIPU, New Delhi to undertake the work and thank IIT Delhi for granting access to the characterization equipment.

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Authors and Affiliations

  1. Department of Chemical Engineering, Indian Institute of Technology Delhi, 110016, New Delhi, Hauz Khas, India

    Amit Singhania

  2. University School of Basic and Applied Sciences, Guru Gobind Singh Indraprastha University, 110078, New Delhi, India

    Shipra Mital Gupta

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  1. Amit Singhania
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  2. Shipra Mital Gupta
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Correspondence to Amit Singhania or Shipra Mital Gupta.

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Amit Singhania, Shipra Mital Gupta Highly Active CeO2 Nanocatalysts for Low-Temperature CO Oxidation. Russ. J. Phys. Chem. 92, 1900–1906 (2018). https://doi.org/10.1134/S0036024418100321

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