Au/Mg(OH)2: Highly efficient for selective oxidation of 1,2-propanediol to lactic acid with molecular oxygen |
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| Authors: | Hong Ma Xin Nie JiaYing Cai Chen Chen Jin Gao Hong Miao Jie Xu |
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| Institution: | 1. State Key Laboratory of Catalysis; Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
2. Graduate University of Chinese Academy of Sciences, Beijing, 100049, China
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| Abstract: | The catalytic oxidation of biomass-derived polyhydroxyl compounds provides an efficient and green route for biomass resource utility. Gold nanocrystals supported on Mg(OH)2 were synthesized by sol-immobilization method, characterized by XRD, TEM, UV-vis DRS, and tested in the selective oxidation of 1,2-propanediol to lactic acid. The gold particle size and the ratio of Au to 1,2-propanediol strongly influenced the catalytic activity. Over Au/Mg(OH)2 with the majority of gold particles concentrated in 14–18 nm, excellent catalytic performance with 94.4% conversion and 89.3% selectivity to lactic acid has been achieved under 0.3 MPa O2 at 60 °C for 6 h. |
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