催化作用
碳酸二甲酯
甲醇
碳酸乙烯酯
碳酸盐
无机化学
材料科学
初湿浸渍
碱土金属
碱金属
乙烯
金属
核化学
化学
选择性
有机化学
物理化学
冶金
电解质
电极
作者
Jin Oh Jun,Joongwon Lee,Ki Hyuk Kang,In Kyu Song
标识
DOI:10.1166/jnn.2015.11248
摘要
A series of CeO 2 ( X )–MgO(1− X ) ( X = 0, 0.25, 0.5, 0.75, and 1.0) nano-catalysts were prepared by a co-precipitation method for use in the synthesis of dimethyl carbonate from ethylene carbonate and methanol. Among the CeO 2 ( X )–MgO(1− X ) catalysts, CeO 2 (0.25)–MgO(0.75) nano-catalyst showed the best catalytic performance. Alkali and alkaline earth metal oxides (MO = Li 2 O, K 2 O, Cs 2 O, SrO, and BaO) were then supported on CeO 2 (0.25)–MgO(0.75) by an incipient wetness impregnation method with an aim of improving the catalytic performance of CeO 2 (0.25)–MgO(0.75). Basicity of the catalysts was determined by CO 2 -TPD experiments in order to elucidate the effect of basicity on the catalytic performance. The correlation between catalytic performance and basicity showed that basicity played an important role in the reaction. Yield for dimethyl carbonate increased with increasing basicity of the catalysts. Among the catalysts tested, Li 2 O/CeO 2 (0.25)–MgO(0.75) nano-catalyst with the largest basicity showed the best catalytic performance in the synthesis of dimethyl carbonate.
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