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Atomically Dispersed Pd Atoms on a Simple MgO Support with an Ultralow Loading for Selective Hydrogenation of Acetylene to Ethylene |
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| Authors: | Chao Qin Qing Guo Prof Jianping Guo Prof Ping Chen |
| Institution: | 1. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 P. R. China
University of Chinese Academy of Sciences, Beijing, 100049 P. R. China These authors contributed equally.;2. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 P. R. China;3. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 P. R. China University of Chinese Academy of Sciences, Beijing, 100049 P. R. China |
| Abstract: | We report a simple and efficient Pd/MgO catalyst loaded with ppm level of Pd (7.8 ppm) for semi-hydrogenation of acetylene to ethylene. The catalyst showed excellent performance with high acetylene conversion (97%), high ethylene selectivity (89%) and good stability. Moreover, the atomically dispersed Pd atoms are inactive for ethylene hydrogenation. Isotopic and FTIR results suggest that H2 dissociates at isolated Pd atoms in a heterolytic manner forming O?H bond, which may account for the high selectivity. |
| Keywords: | Selective hydrogenation of acetylene Atomically dispersed Pd atoms MgO support |