A transition metal (Zn) and alkaline earth metal (Ca)-hybridized metal-organic framework (MOF) based electrocatalyst was synthesized using a one-pot process. The as-prepared ZnCa-MOF74 (ZC) catalyst exhibited a low overpotential, an excellent CO selectivity, and high stability in the electrochemical reduction of CO₂ (ERC). The Faradaic efficiency of ZC towards CO was as high as 93%, which is two times higher than that of the Zn-MOF74 catalyst. The computational simulation also showed that Ca lowered the activation barrier of the rate-determining step during the ERC.

中文翻译：

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高CO选择性的Ca和Zn杂化金属-有机骨架复合电催化剂，用于电化学还原CO ₂

使用一锅法合成了过渡金属（Zn）和碱土金属（Ca）杂化的金属-有机骨架（MOF）基电催化剂。所制备的ZnCa-MOF74（ZC）催化剂表现出低的超电势，优异的CO选择性和在电化学还原CO ₂（ERC）中的高稳定性。ZC对CO的法拉第效率高达93％，是Zn-MOF74催化剂的两倍。计算仿真还表明，Ca降低了ERC过程中速率确定步骤的激活势垒。