Combination of supported bimetallic rhodium-molybdenum catalyst and cerium oxide for hydrogenation of amide

Yoshinao Nakagawa, Riku Tamura, Masazumi Tamura, Keiichi Tomishige

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Hydrogenation of cyclohexanecarboxamide to aminomethylcyclohexane was conducted with silica-supported bimetallic catalysts composed of noble metal and group 6-7 elements. The combination of rhodium and molybdenum with molar ratio of 1:1 showed the highest activity. The effect of addition of various metal oxides was investigated on the catalysis of Rh-MoOx/SiO2, and the addition of CeO2 much increased the activity and selectivity. Higher hydrogen pressure and higher reaction temperature in the tested range of 2-8 MPa and 393-433 K, respectively, were favorable in view of both activity and selectivity. The highest yield of aminomethylcyclohexane obtained over Rh-MoOx/SiO2 + CeO2 was 63%. The effect of CeO2 addition was highest when CeO2 was not calcined, and CeO2 calcined at >773 K showed a smaller effect. The use of CeO2 as a support rather decreased the activity in comparison with Rh-MoOx/SiO2. The weakly-basic nature of CeO2 additive can affect the surface structure of Rh-MoOx/SiO2, i.e. reducing the ratio of Mo-OH/Mo-O- sites.

Original languageEnglish
Article number014901
JournalScience and Technology of Advanced Materials
Volume16
Issue number1
DOIs
Publication statusPublished - 2015

Keywords

  • amide
  • amine
  • ceria
  • heterogeneous catalysis
  • rhodium

ASJC Scopus subject areas

  • Materials Science(all)

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