| Autor: |
Lv, YongGe, Li, Yong, Ta, Na, Shen, WenJie |
| Zdroj: |
SCIENCE CHINA Chemistry; June 2014, Vol. 57 Issue: 6 p873-880, 8p |
| Abstrakt: |
Hexagonal β-Co(OH)2nanosheets 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)2nanosheets was converted into Co3O4nanosheets with a similar dimension. Structural analyses during the calcination process identified that the β-Co(OH)2precursor was initially dehydrated to HCoO2and subsequently transferred into Co3O4. When being applied to catalyze CO oxidation at room temperature, the Co3O4nanosheets 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 Co3O4nanosheets. 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. |
| Databáze: |
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