期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 170, 期 -, 页码 34-42出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2015.01.027
关键词
N2O decomposition; CoZSM-11; CoZSM-5; Ion exchange; Stability
资金
- National Natural Science Foundation of China [20773027, 21273043, 21477022]
- Science and Technology Commission of Shanghai Municipality [13DZ2275200]
- National Fund for Talent Training in Basic Science [J1103304]
CoZSM-11 catalysts prepared using different methods (i.e., wet ion exchange, buffered ion exchange, semi-continuous ion exchange, and impregnation) were tested in N2O decomposition. For CoZSM-11 catalysts prepared by wet ion exchange, the activity increased with the decrease of the Si/Al ratio. Even higher activities can be achieved using catalysts prepared by buffered ion exchange or semi-continuous ion exchange. In contrast, CoZSM-11 prepared by impregnation was the least active. The catalysts were characterized by XRD, N-2 sorption, ICP,(27)AlMAS NMR, H-2-TPR, XPS, and UV-vis DRS. It was concluded that isolated Co2+ cations, in particular alpha-type Co2+, were active sites, whereas the CoOx species obtained by impregnation was much less active. The catalytic performance of CoZSM-11 and CoZSM-5 was compared as well. (C) 2015 Elsevier B.V. All rights reserved.
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