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

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 CeO 2 and Au/CeO 2 nanocomposites for CO oxidation are investigated in...

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Bibliographic Details
Published in:Catalysis letters 2017-06, Vol.147 (6), p.1322-1332
Main Authors: Ma, Xueqin, Tang, Ke, Liu, Wei, Genyuan, Zhao, Zhu, Wenshuang, Wang, Shuping, Guo, Yonghua, Yang, Hongxiao, Guo, Jinxin, Yang, Yanzhao
Format: Article
Language:English
Subjects:
Catalysis
Catalytic activity
Cerium oxides
Chemistry
Chemistry and Materials Science
Chitosan
Gold
Industrial Chemistry/Chemical Engineering
Lattice vacancies
Nanocomposites
Nanospheres
Organometallic Chemistry
Oxidation
Physical Chemistry
Reducing agents
Shells
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Summary: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 CeO 2 and Au/CeO 2 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 Ce 4+ to Ce 3+ as reducing agent, resulting in the increasing of the oxygen vacancy, following the co-existence of Au 3+ and Au 0 , which leads to the improvement of the catalytic activity for CO oxidation. As a result, the synthesized Au/CeO 2 nanospheres with the assistance of CS exhibit a higher catalytic activity in CO oxidation than Au/CeO 2 like-cube. Graphical Abstract
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-017-2039-z