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 H-2/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 H-2, 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 H-2) that can be easily adjusted from 3:1 to 1:3 (H-2/CO) by changing the applied voltage during the CO2 conversion process.

Automated summary

By using a simple method, several silver-doped zeolitic imidazole framework (ZIF-8) composites were prepared. CO2 electroreduction on Ag-doped ZIF-8 catalysts shows high faradaic efficiency (almost 100%) in producing CO and H2, and the H2/CO ratio can be easily controlled from 3:1 to 1:3 by adjusting the applied voltage.