期刊
CHEMISTRYSELECT
卷 7, 期 4, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.202103297
关键词
Dimethyl oxalate; Ethanol; Hydrogenation; Oxygen vacancies; Supported catalysts
资金
- National Natural Science Foundation of China [21962015]
In this study, xPd-In2O3/ZrO2 catalysts were synthesized using a co-precipitation method followed by an impregnation method for the hydrogenation of dimethyl oxalate to ethanol. The results showed that xPd-In2O3/ZrO2 exhibited excellent catalytic activity, and Pd-doping improved the performance of the catalysts. The 0.5% Pd-In2O3/ZrO2 catalyst achieved 100% conversion and 84% ethanol selectivity. The enhanced catalytic activity can be attributed to the increase of activated hydrogen concentration during hydrogen spillover and the formation of oxygen vacancies.
A co-precipitation method followed by an impregnation method was used to synthesize the xPd-In2O3/ZrO2 catalysts that could be used for the hydrogenation of dimethyl oxalate to ethanol. The results indicated that xPd-In2O3/ZrO2 exhibited excellent catalytic activity during the hydrogenation of dimethyl oxalate to ethanol. It was found that Pd-doping could improve the performance of the catalysts. 100 % conversion and 84 % ethanol selectivity could be achieved using the 0.5 % Pd-In2O3/ZrO2 catalyst. In-depth charact-erization of the xPd-In2O3/ZrO2 catalyst revealed the occurrence of hydrogen spillover and the formation of oxygen vacancies on the surface of the catalyst. The improvement in the catalytic activity can be attributed to the increase of activated hydrogen concentration during the process of hydrogen spillover in the presence of Pd and the enhancement of activation capacity (toward dimethyl oxalate) of the catalyst caused by the formation of oxygen vacancies.
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