Fast Screening for Cu-based Bimetallic Electrocatalysts: Efficient Electrocatalytic Reduction of CO2 to C2+Products on Magnesium-Copper

Fast Screening for Cu-based Bimetallic Electrocatalysts: Efficient Electrocatalytic Reduction of CO₂ to C₂₊Products on Magnesium-Copper

Article Link: https://onlinelibrary.wiley.com/doi/10.1002/anie.202213423

研之成理推送：https://mp.weixin.qq.com/s/EhkJa_SdVXnf2xN3m05nMg

Our article “Fast Screening for Cu-based Bimetallic Electrocatalysts: Efficient Electrocatalytic Reduction of CO₂ to C₂₊Products on Magnesium-Copper” has been published in Angew. Chem. Int. Ed.

Electroreduction of CO₂ (CO₂RR) into high value-added chemicals is an attractive route to achieve carbon neutrality. However, the development of an efficient catalyst for CO₂RR is still largely by trial-and-error and is very time-consuming. Herein, we built an electrocatalyst testing platform featuring a home-built automatic flow cell to accelerate the discovery of efficient catalysts. A fast screening of 109 Cu-based bimetallic catalysts in only 55 h identifies Mg combined with Cu as the best electrocatalyst for CO₂ to C₂₊ products. The thus designed Mg−Cu catalyst achieves a Faradaic efficiency (FE) of C₂₊ products up to 80 % with a current density of 1.0 A cm⁻² at −0.77 V versus reversible hydrogen electrode (RHE). Systematic experiments with in situ spectroelectrochemistry analyses show that Mg²⁺ species stabilize Cu⁺ sites during CO₂RR and promote the CO₂ activation, thus enhancing the *CO coverage to promote C−C coupling.