Reduction of NO with CH4 Effected by Copper Oxide Clusters in the Channels of ZSM-5

Y. J. Huang, H. Paul Wang

研究成果: Article同行評審

31 引文 斯高帕斯(Scopus)

摘要

Fine structures of the copper oxide clusters involved in catalytic reduction of NO were studied by X-ray absorption spectroscopy. The Extended X-ray absorption fine structural (EXAFS) spectra indicate that about 2.89 nearest oxygen atoms bond to the Cu central atoms with a Cu-O bond distance of 1.96 Å for the oxidized Cu-ZSM-5 catalyst. Reduction of the catalyst in hydrogen at 573 K led to the formation of mainly Cu-Cu (2.54 Å) species with the coordination number (CN) of 2.91. The Cu4O2 clusters in the channels of ZSM-5 observed by EXAFS were formed in the NO reduction process via incorporation of oxygen into the metallic copper matrix with desorption of N2. Due to the restricted channel structure of ZSM-5, the Cu4O2 clusters were reduced promptly by CH4.

原文English
頁(從 - 到)6514-6516
頁數3
期刊Journal of Physical Chemistry A
103
發行號33
DOIs
出版狀態Published - 1999 八月 19

All Science Journal Classification (ASJC) codes

  • 物理與理論化學

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