期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 17, 期 21, 页码 14012-14020出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5cp01829c
关键词
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资金
- National Natural Science Foundation of China [21103045, 1210040, 1103312]
- Fundamental Research Funds for the Central Universities
A series of catalysts, i.e. metal oxides (MO) such as CeO2, Fe2O3 and Al2O3 supported Co-N-C (Co-N-C/MO) were prepared by heating supported cobalt porphyrin in a N-2 atmosphere. Among the Co-N-C/MO catalysts, Co-N-C/CeO2 shows a remarkable catalytic performance for ethylbenzene oxidation with ethylbenzene conversion of 33.1% and selectivity to acetophenone of 74.8%. In addition, the interaction between Co-N-C and supports was tentatively characterized by techniques such as XRD, HRTEM, XPS etc. According to XPS, the presence of the redox cycle between Ce3+ and Ce4+ in CeO2 facilitates the formation of cobalt ions in the high valence state and the Co-N-x sites, which are typically responsible for the high catalytic activity. The high performance benefits from the synergistic effect between Co-N-C and CeO2 and the well-dispersed Co-based sites.
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