Hydrogenation of dimethyl oxalate (DMO) on Cu/SiO₂ catalysts is the final reaction step in a growing industrial syngas to ethylene glycol (StEG) process. In the present work, indium species are found to dramatically enhance the performance of a Cu/SiO₂ catalyst prepared by urea-assisted gelation for the conversion of DMO to EG. Characterization reveals that indium species have negligible effect on the content of Cu⁺ species on the surface. Rather, the promotional effect likely originates from interactions between reduced indium species and Cu⁰ species though enhanced ability of the latter to activate H₂.

中文翻译：

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铟促进的Cu / SiO ₂增强草酸二甲酯加氢制乙二醇

草酸二甲酯（DMO）在Cu / SiO ₂催化剂上的加氢反应是不断增长的工业合成气制乙二醇（StEG）工艺的最后反应步骤。在当前的工作中，发现铟物种显着增强了通过尿素辅助凝胶化制备的将DMO转化为EG的Cu / SiO ₂催化剂的性能。表征表明，铟种类对表面上Cu ⁺种类的含量的影响可忽略不计。相反，促进作用可能源自还原的铟物种和Cu ⁰物种之间的相互作用，尽管后者激活H _2的能力增强。