Cu-based bimetallic electrocatalysts for CO2 reduction

The extensive consumption of fossil fuels has caused the rapid increase in the CO2 level in the atmosphere, forcing people to find a clean and efficient technology of CO2 conversion to alleviate CO2 emissions and develop valueadded products. Among various CO2 conversion systems, electroreduction of CO2 to value-added chemicals is a feasible way for practical applications. Copper, the only metal that can catalyze CO2 reduction to multi-carbon products, has attracted the most attention among various catalysts. However, slow reaction kinetics, low product selectivity, as well as poor stability are the main drawbacks of single metallic Cu-based catalysts. Such issues can be addressed by introducing second metal in Cu-based catalysts. Here, we summarize the recent progress relating to the Cu-based bimetallic electrocatalysts for CO2 reduction, and discuss the composition and structure effects on the activity and selectivity of electrochemical CO2 reduction. Last, we outline the challenges and perspectives on electrocatalysts for this field. We expect that this review can provide new insights into the further development of Cu-based bimetallic electrocatalysts for CO2 reduction.

Automated summary

The extensive consumption of fossil fuels has led to a rapid increase in atmospheric CO2 levels, necessitating the development of a clean and efficient technology for CO2 conversion. Copper, as the only metal capable of catalyzing the conversion of CO2 to multi-carbon products, has attracted considerable attention. However, single copper-based catalysts suffer from slow reaction kinetics, low product selectivity, and poor stability, which can be addressed by introducing a second metal. This review summarizes recent progress in Cu-based bimetallic electrocatalysts for CO2 reduction, discussing the effects of composition and structure on their activity and selectivity, and outlining the challenges and prospects in this field.