Indium-Based Metal–Organic Framework for High-Performance\nElectroreduction of CO₂ to Formate

Abstract

It\nis urgent to find a catalyst with high selectivity and efficiency\nfor the reduction of CO₂ by renewable electric energy,\nwhich is the important means to reduce the greenhouse effect. In this\nwork, we report that the metal–organic framework (MOF) indium-based\n1,4-benzenedicarboxylate (In-BDC) catalyzes CO₂ to formate\nwith a Faradaic efficiency (FE_HCOO^–)\nof more than 80% in a wide voltage range between −0.419 and\n−0.769 V (vs. reversible hydrogen electrode, RHE). In-BDC performs\nat a maximum FE_HCOO^– of 88% at −0.669\nV (vs. RHE) and a turnover frequency of up to 4798 h^–1 at −1.069 V (vs. RHE). The long-term durability of 21 h and\nreusability of the electrocatalyst are clearly demonstrated. It opens\nup a new opportunity to utilize MOF with novel metal motifs for the\nefficient electroreduction of CO₂.