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Co3O4 nanosheets: synthesis and catalytic application for CO oxidation at room temperature

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Abstract

Hexagonal β-Co(OH)2 nanosheets with edge length of 50 nm and thickness of 10 nm were hydrothermally synthesized with the aid of triethylamine. Upon calcination at 350 °C in air, the β-Co(OH)2 nanosheets was converted into Co3O4 nanosheets with a similar dimension. Structural analyses during the calcination process identified that the β-Co(OH)2 precursor was initially dehydrated to HCoO2 and subsequently transferred into Co3O4. When being applied to catalyze CO oxidation at room temperature, the Co3O4 nanosheets exhibited a higher activity than the conventional spherical nanoparticles. This was perhaps related to the partial exposure of the {11\(\bar 2\)} planes over the Co3O4 nanosheets. The porous structure generated during the calcination process also provided significant amounts of surface defects, which might contribute to the enhanced catalytic activity as well.

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Authors and Affiliations

  1. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China

    YongGe Lv, Yong Li, Na Ta & WenJie Shen

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  1. YongGe Lv
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  2. Yong Li
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  3. Na Ta
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  4. WenJie Shen
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Correspondence to WenJie Shen.

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Lv, Y., Li, Y., Ta, N. et al. Co3O4 nanosheets: synthesis and catalytic application for CO oxidation at room temperature. Sci. China Chem. 57, 873–880 (2014). https://doi.org/10.1007/s11426-014-5062-6

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  • DOI: https://doi.org/10.1007/s11426-014-5062-6

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