Structure and Catalytic Properties of the Active Sites on Co-Mo Sulfide Catalysts using Selenophene Hydrodeselenium Reaction as a Probe Reaction
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- KUBOTA Takeshi
- Department of Materials Science, Shimane University
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- ITO Masataka
- Department of Materials Science, Shimane University
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- OKAMOTO Yasuaki
- Department of Materials Science, Shimane University
Bibliographic Information
- Other Title
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- セレノフェン水素化脱セレン反応をプローブとして用いたCo-Mo硫化物触媒の活性サイト構造と触媒特性の解析
- セレノフェン スイソカ ダツセレン ハンノウ オ プローブ ト シテ モチイタ Co Mo リュウカブツ ショクバイ ノ カッセイ サイト コウゾウ ト ショクバイ トクセイ ノ カイセキ
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Abstract
Se-S exchange properties of hydrodeselenium (HDSe) reaction of selenophene on Co-Mo sulfide catalysts prepared by a CVD method were investigated on the basis of the amount of exchangeable sulfur atoms per active site and Co K-edge XAFS. The Co K-edge EXAFS for the CVD-Co/MoS2 catalysts after HDSe reaction was analyzed by a curve fitting method. EXAFS analysis revealed a relationship between the coordination numbers of Co-S and Co-Se shells and the number of incorporated selenium atoms per Co (Se/Co). The change of the coordination numbers of Co-S and Co-Se shells during the reaction are compatible with the dinuclear Co-Mo-S model previously proposed from EXAFS analysis and magnetic properties. A linear relationship was observed between the number of exchanged sulfur atoms per Co atom (H2S/Co) and the activity for thiophene HDS reaction, indicating that the HDS activity depends on the amount of exchangeable sulfur atoms in Co-Mo sulfide catalysts. It was also found that the amount of maximum exchangeable sulfur depends on the catalyst support and sulfidation conditions.
Journal
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- Hyomen Kagaku
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Hyomen Kagaku 30 (7), 380-385, 2009
The Surface Science Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390001206458995712
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- NII Article ID
- 10025201052
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- NII Book ID
- AN00334149
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- COI
- 1:CAS:528:DC%2BD1MXhtFChu7bN
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- ISSN
- 18814743
- 03885321
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- NDL BIB ID
- 10376103
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed