Chinese Journal of Catalysis ›› 2015, Vol. 36 ›› Issue (11): 2004-2010.DOI: 10.1016/S1872-2067(15)60926-3

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SnO2 nano-sheet as an efficient catalyst for CO oxidation

Honggen Peng, Yue Peng, Xianglan Xu, Xiuzhong Fang, Yue Liu, Jianxin Cai, Xiang Wang   

  1. Institute of Applied Chemistry, College of Chemistry, Nanchang University, Nanchang 330031, Jiangxi, China
  • Received:2015-04-19 Revised:2015-06-01 Online:2015-11-02 Published:2015-11-02
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21263015), the Education Department of Jiangxi Province (KJLD14005), and the Natural Science Foundation of Jiangxi Province (20151BBE50006, 20122BAB203009).

Abstract:

Polycrystalline SnO2 fine powder consisting of nano-particles (SnO2-NP), SnO2 nano-sheets (SnO2-NS), and SnO2 containing both nano-rods and nano-particles (SnO2-NR+NP) were prepared and used for CO oxidation. SnO2-NS possesses a mesoporous structure and has a higher surface area, larger pore volume, and more active species than SnO2-NP, and shows improved activity. In contrast, although SnO2-NR+NP has only a slightly higher surface area and pore volume, and slightly more active surface oxygen species than SnO2-NP, it has more exposed active (110) facets, which is the reason for its improved oxidation activity. Water vapor has only a reversible and weak influence on SnO2-NS, therefore it is a potential catalyst for emission control processes.

Key words: SnO2 catalyst, Nano-sheet, Nano-rod, Exposed active facet, CO oxidation