The competition and diversity of coinstantaneous elementary reactions in syngas conversion make the production of targeted products with high selectivity much more challenging. This work demonstrates the control of product distribution in syngas conversion by changing the adsorption strength of non-dissociated CO on engineered Cu sites. The strength of non-dissociated CO adsorption has been tailored by atomic-Cu1 or ensemble-Cun on Co1Ga1 intermetallic compounds. In syngas conversion, the introduction of either Cu sites could promote the selectivity of alcohols, while atomic-Cu1 sites enhance the production of methanol and ensemble-Cun sites favor the production of C2+ alcohol. A strong adsorption of non-dissociated CO occurs on electron-deficient atomic-Cu1 sites, leading to an increase of alcohols with > 90 % of methanol in alcohols due to direct hydrogenation. A weaker adsorption of non-dissociated CO occurs on ensemble-Cun sites, which allows the carbonyl insertion to alkyl species, affording alcohols with ∼ 92 % of C2+ alcohol.

中文翻译：

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在合成气转化中，根据工程铜位点上的非解离 CO 吸附强度定制醇分布


合成气转化中同瞬时基本反应的竞争和多样性使得生产具有高选择性的目标产品更具挑战性。这项工作展示了通过改变工程铜位点上未解离 CO 的吸附强度来控制合成气转化中的产品分布。非解离 CO 吸附的强度是通过原子 Cu1 或集成 Cun 对 Co1Ga1 金属间化合物进行定制的。在合成气转化中，引入任一 Cu 位点都可以促进醇的选择性，而原子 Cu1 位点会促进甲醇的产生，而 consec-Cun 位点有利于 C2+ 醇的生产。未解离的 CO 的强烈吸附发生在缺电子的原子 Cu1 位点上，导致醇类中 > 的增加 90% 的甲醇是由于直接氢化。非解离 CO 的吸附较弱发生在 ensemble-Cun 位点，这允许羰基插入烷基物质，从而获得 C2+ 醇含量约为 92% 的醇。