期刊
CATALYSIS COMMUNICATIONS
卷 12, 期 13, 页码 1265-1268出版社
ELSEVIER
DOI: 10.1016/j.catcom.2011.04.003
关键词
Gold; Co3O4; Morphology; Crystal plane; Ethylene complete oxidation
资金
- National Natural Sciences Fund for Distinguished Young Scholar [20725723]
- National High Technology Research and Development Program of China [2006AA06A310]
Au/Co3O4 catalysts with different morphologies (nanorods, nanopolyhedra and nanocubes) were successfully synthesized and evaluated for ethylene complete oxidation. We found that support morphology has a significant effect on catalytic activity, which is related to the exposed planes of different morphological Co3O4. HRTEM revealed the Co3O4-nanorods predominantly exposes {110} planes, while the dominant exposed planes of Co3O4-nanopolyhedra and -nanocubes are OM and {001} planes, respectively. Compared with {011} and {001} planes, {110} planes exhibit the maximum amount of oxygen vacancies, which play a major role in ethylene oxidation. Therefore, Au/Co3O4-nanorods exhibits extraordinary catalytic activity, yielding 93.7% ethylene conversion at 0 degrees C. (C) 2011 Elsevier B.V. All rights reserved.
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