Silver-Doped Zeolitic Imidazolate Framework (Ag@ZIF-8): An Efficient Electrocatalyst for CO₂ Conversion to Syngas

To enable the reuse of carbon dioxide (CO₂), electrocatalytic reduction of CO₂ (CO₂RR) into syngas with a controllable H₂/CO ratio is considered a cost-effective and intriguing approach. Here, a number of silver (Ag)-doped, zeolitic imidazole framework composites were prepared by a facile method. The outcomes demonstrate that CO₂ electroreduction on Ag-doped ZIF-8 catalysts produces just CO and H₂, without having any liquid fuel, resulting in a total faradaic efficiency approaching 100%. The most optimal Ag-Zn-ZIF-8 (10% Ag, 90% Zn) demonstrates good selectivity for syngas (CO and H₂) that can be easily adjusted from 3:1 to 1:3 (H₂/CO) by changing the applied voltage during the CO₂ conversion process.