Efficient electrocatalytic reduction of carbon dioxide by metal-doped β-borophene monolayers.

Electrochemical reduction of CO to value-added chemicals and fuels shows great promise in contributing to reducing the energy crisis and environment problems. This progress has been slowed by a lack of stable, efficient and selective catalysts. In this paper, density functional theory (DFT) was used to study the catalytic performance of the first transition metal series anchored TM-B monolayers as catalysts for electrochemical reduction of CO. The results show that the TM-B monolayer structure has excellent catalytic stability and electrocatalytic selectivity. The primary reduction product of Sc-B is CO and the overpotential is 0.45 V. The primary reduction product of the remaining metals (Ti-Zn) is CH, where Fe-B has the minimum overpotential of 0.45 V. Therefore, these new catalytic materials are exciting. Furthermore, the underlying reaction mechanisms of CO reduction the TM-B monolayers have been revealed. This work will shed insights on both experimental and theoretical studies of electroreduction of CO.