期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 117, 期 20, 页码 10502-10511出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp400984z
关键词
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资金
- National Natural Science Foundation of China [51108258]
- Science and Technology Commission of Shanghai Municipality [10540500100, 11nm0502200]
- Doctoral Fund of Ministry of Education of China [20123108120018]
- Research Fund for the innovation Program of Shanghai University [A.10040711003]
- Shanghai Municipal Education Commission [B.37040711001]
- STCSM postdoctoral foundation [12R21413300]
The morphology effect of ZrO2-CeO2 on the performance of MnOx/ZrO2-CeO2 catalyst for the selective catalytic reduction of NO with ammonia was investigated. The catalytic tests showed that the MnOx/ZrO2-CeO2 nanorods achieved significantly higher NO conversions than the nanocubes and nanopolyhedra. The catalytic tests also showed that the MnOx/ZrO2-CeO2 nanorods achieved a significantly higher rate constant with respect to NO conversion than that of the nanocubes and nanopolyhedra. On the nanorods, the apparent activation energy is 25 kJ mol(-1,) which was much lower than the values of nanocubes and nanopolyhedra (42 and 43 kJ mol(-1)). The high resolution transmission electron microscopy showed that the nanorods predominately exposed {110} and {100} planes. It was demonstrated that the ZrO2-CeO2 nanorods had a strong interaction with MnOx species, which resulted in great superiority for the selective catalytic reduction of NO. The excellent catalytic activity of the MnOx/ZrO2-CeO2 nanorods should be attributed to the Mn4+ species, adsorbed surface oxygen and oxygen vacancies which are associated with their exposed {110} and {100} planes.
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