| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 77143 | Microporous and Mesoporous Materials | 2007 | 9 Pages |
Abstract
The structure and catalytic property of molybdenum sulfide clusters encaged in NaY zeolite were investigated as a function of the composition of the host zeolite. The local structure of molybdenum sulfides was studied by means of MoK-edge XAFS. The local structure of intrazeolite molybdenum sulfide clusters depended on the Si/Al ratio of the host zeolite. Molybdenum sulfide dimer species were formed in NaY zeolites with a composition of 3.5 > Si/Al > 2.1. It is proposed that the structure of dimer clusters is reversibly transformed into a tetramer structure by an H2-treatment at 673 K. The intrinsic activity of molybdenum sulfide clusters for the HDS of thiophene decreased as the Mo–Mo distance of Mo2S4 dimer clusters increased.
Related Topics
Physical Sciences and Engineering
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Catalysis
Authors
Takeshi Kadono, Hironori Chatani, Takeshi Kubota, Yasuaki Okamoto,