高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (S1): 296.

• Chemistry in Materials Sciences • 上一篇    下一篇

MCM-41 Supported Rhenium Oxides:Characterization and Selective Methanol Oxidation

YUAN You-Zhu, CAO Wei, YU La-Jia, YANG Yi-Quan, LI Zhi-Hua   

  1. Department of Chemistry, State Key Lab for Physical Chemistry of Solid Surface, Xiamen University, Xiamen 361005
  • 出版日期:2000-12-31 发布日期:2000-12-31
  • 基金资助:

    Supported by the NSFC (No. 29873037) and the Ministry of Education of China.

MCM-41 Supported Rhenium Oxides:Characterization and Selective Methanol Oxidation

YUAN You-Zhu, CAO Wei, YU La-Jia, YANG Yi-Quan, LI Zhi-Hua   

  1. Department of Chemistry, State Key Lab for Physical Chemistry of Solid Surface, Xiamen University, Xiamen 361005
  • Online:2000-12-31 Published:2000-12-31
  • Supported by:

    Supported by the NSFC (No. 29873037) and the Ministry of Education of China.

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摘要：

Re oxides have not widely been used as catalysts for selective oxidations owing to sublimation under pretreatment and reaction conditions[1].Nevertheless, the property of Re species capable of adopting a variety of oxidation states that are illustrated in both binary and ternary oxides[2,3],may provide rich and interesting chemistry. One of us reported a crystalline binary oxide compound SbRe2O6 for the selective methylal formation in the methanol oxidation[4]. The selectivity reached 92.5% at a conversion of 6.5% at 573 K. The performance of SbRe2O6 was attributed to the Re-oxide octahedra connecting with Sb-O chains[5]. However, the crystalline oxide SbRe2O6 has a very low surface area (1 m2 g-1),resulting in insufficient activity for the methylal production. Recently, we found the new catalytic property of supported Re oxides for the selective oxidation of methanol to methylal[6]. Here, we report the characterization and catalytic property of MCM-41 supported Re oxides for the selective methanol oxidation.

Abstract:

Re oxides have not widely been used as catalysts for selective oxidations owing to sublimation under pretreatment and reaction conditions[1].Nevertheless, the property of Re species capable of adopting a variety of oxidation states that are illustrated in both binary and ternary oxides[2,3],may provide rich and interesting chemistry. One of us reported a crystalline binary oxide compound SbRe2O6 for the selective methylal formation in the methanol oxidation[4]. The selectivity reached 92.5% at a conversion of 6.5% at 573 K. The performance of SbRe2O6 was attributed to the Re-oxide octahedra connecting with Sb-O chains[5]. However, the crystalline oxide SbRe2O6 has a very low surface area (1 m2 g-1),resulting in insufficient activity for the methylal production. Recently, we found the new catalytic property of supported Re oxides for the selective oxidation of methanol to methylal[6]. Here, we report the characterization and catalytic property of MCM-41 supported Re oxides for the selective methanol oxidation.

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