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Influence of Chitosan on the Microstructured Au/CeO2 Catalyst: An Enhanced Catalytic Performance for CO Oxidation

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Abstract

In this work, a facile solvothermal method with the assistance of chitosan (CS) has been developed to prepare well-dispersed ceria core–shell nanospheres. The effects of CS on the growth mechanism and the catalytic performance of CeO2 and Au/CeO2 nanocomposites for CO oxidation are investigated in detail. CS leads to the formation of core–shell nanospheres as soft template, changing the exposed lattice planes, and reducing Ce4+ to Ce3+ as reducing agent, resulting in the increasing of the oxygen vacancy, following the co-existence of Au3+ and Au0, which leads to the improvement of the catalytic activity for CO oxidation. As a result, the synthesized Au/CeO2 nanospheres with the assistance of CS exhibit a higher catalytic activity in CO oxidation than Au/CeO2 like-cube.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (grant no. 21476129 and 21506072), the Natural Science Foundation of Shandong Province (Grant Nos. ZR2013BM026 and BS2015CL010) and the Science & Technology Development Projects of Shandong Province (Grant No. 2014GSF117024).

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Correspondence to Jinxin Guo or Yanzhao Yang.

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Ma, X., Tang, K., Liu, W. et al. Influence of Chitosan on the Microstructured Au/CeO2 Catalyst: An Enhanced Catalytic Performance for CO Oxidation. Catal Lett 147, 1322–1332 (2017). https://doi.org/10.1007/s10562-017-2039-z

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  • DOI: https://doi.org/10.1007/s10562-017-2039-z

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