Single Sb sites for efficient electrochemical CO2 reduction.

We report for the first time the facile synthesis of Sb single atoms supported on N-doped porous carbon. As compared to bulk Sb, Sb2O3, and Sb nanoparticles, that exhibit poor electrocatalytic CO2 reduction activity, the as-prepared Sb atomic sites enable efficient aqueous electroreduction of CO2 to CO with a high CO turnover frequency exceeding 16 500 h-1 at -0.9 V (versus the reversible hydrogen electrode), outperforming many other single atom electrocatalysts reported thus far.