Combination of supported bimetallic rhodium–molybdenum catalyst and cerium oxide for hydrogenation of amide
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...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2015-02-01
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| Series: | Science and Technology of Advanced Materials |
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| Online Access: | http://dx.doi.org/10.1088/1468-6996/16/1/014901 |
| _version_ | 1818522693195005952 |
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| author | Yoshinao Nakagawa Riku Tamura Masazumi Tamura Keiichi Tomishige |
| author_facet | Yoshinao Nakagawa Riku Tamura Masazumi Tamura Keiichi Tomishige |
| author_sort | Yoshinao Nakagawa |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-11T05:36:28Z |
| format | Article |
| id | doaj.art-9c532b1450b943c883c73100562215a3 |
| institution | Directory Open Access Journal |
| issn | 1468-6996 1878-5514 |
| language | English |
| last_indexed | 2024-12-11T05:36:28Z |
| publishDate | 2015-02-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Science and Technology of Advanced Materials |
| spelling | doaj.art-9c532b1450b943c883c73100562215a32022-12-22T01:19:16ZengTaylor & Francis GroupScience and Technology of Advanced Materials1468-69961878-55142015-02-0116110.1088/1468-6996/16/1/01490111661244Combination of supported bimetallic rhodium–molybdenum catalyst and cerium oxide for hydrogenation of amideYoshinao Nakagawa0Riku Tamura1Masazumi Tamura2Keiichi Tomishige3Tohoku UniversityTohoku UniversityTohoku UniversityTohoku UniversityHydrogenation 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.http://dx.doi.org/10.1088/1468-6996/16/1/014901heterogeneous catalysisrhodiumceriaamideamine |
| spellingShingle | Yoshinao Nakagawa Riku Tamura Masazumi Tamura Keiichi Tomishige Combination of supported bimetallic rhodium–molybdenum catalyst and cerium oxide for hydrogenation of amide Science and Technology of Advanced Materials heterogeneous catalysis rhodium ceria amide amine |
| title | Combination of supported bimetallic rhodium–molybdenum catalyst and cerium oxide for hydrogenation of amide |
| title_full | Combination of supported bimetallic rhodium–molybdenum catalyst and cerium oxide for hydrogenation of amide |
| title_fullStr | Combination of supported bimetallic rhodium–molybdenum catalyst and cerium oxide for hydrogenation of amide |
| title_full_unstemmed | Combination of supported bimetallic rhodium–molybdenum catalyst and cerium oxide for hydrogenation of amide |
| title_short | Combination of supported bimetallic rhodium–molybdenum catalyst and cerium oxide for hydrogenation of amide |
| title_sort | combination of supported bimetallic rhodium molybdenum catalyst and cerium oxide for hydrogenation of amide |
| topic | heterogeneous catalysis rhodium ceria amide amine |
| url | http://dx.doi.org/10.1088/1468-6996/16/1/014901 |
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