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Aerobic oxidation of alcohols over Au/TiO2: An insight on the promotion effect of water on the catalytic activity of Au/TiO2 |
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| Authors: | Xiaomin Yang Xiuna Wang Changhai Liang Weiguang Su Chuang Wang Zhaochi Feng Can Li Jieshan Qiu |
| Affiliation: | aCarbon Research Laboratory, Center for Nano Materials of Science, State Key Laboratory of Fine Chemicals, Dalian University of Technology, 158 Zhongshan Road, P.O. Box 49, Dalian 116012, China;bState Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Dalian 116023, China |
| Abstract: | The unique and significant promotion effect of water has been evidenced by the selective oxidation of benzyl alcohol to benzaldehyde over Au/TiO2 catalysts. Water has dual promotional functions in the reaction system: to help form unique microdroplets in a multiphase reaction system and to assist the oxygen adsorption and activation. The conversion of benzyl alcohol at a molar ratio of water to solvent (p-xylene) of 7 is 7 times higher than in the absence of water. The present work has highlighted the potential of Au/TiO2 catalysts in aerobic oxidation of alcohols in the unique multiphase reaction system with water as promoting solvent. |
| Keywords: | Au/TiO2 Water Aerobic oxidation Alcohol |
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