Chemoselective hydrogenation of phenol to cyclohexanol using heterogenized cobalt oxide catalysts |
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Authors: | Zhongzhe Wei Yi Li Jing Wang Haoran Li Yong Wang |
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Affiliation: | a Institute of Industrial Catalysis, College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China;b Advanced Materials and Catalysis Group, ZJU-NHU United R & D Center, Department of Chemistry, Zhejiang University, Hangzhou 310028, China |
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Abstract: | Cyclohexanol is an important intermediate in the synthesis of Nylon-6 and plasticizers. In this work, cobalt oxide nanoparticles (NPs) supported on porous carbon (CoOx@CN) were fabricated by one-pot method and the hybrids could efficiently and selectively hydrogenate phenol to cyclohexanol with a high yield of 98%. The high catalytic performance of CoOx@CN was associate with the high surface area (340 m2/g) and uniformly dispersed NPs. Furthurmore, by detailed analysing the relationship between catalytic activity and catalysts composition, it clearly indicated that the Co3O4 in CoOx@CN played an important role for the adsorption and activation of phenol and the in situ gernerated Co was responsible for hydrogen adsorption and dissociation. These findings provide a fundamental insight into the real active sites in hydrogenation of phenol using Co-based catalysts. |
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Keywords: | Phenol Cyclohexanol Selective hydrogenation Cobalt oxides Metallic cobalt |
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