Elevating CO2 selective conversion: Insights into copper-based single atom alloy catalysts

The electrochemical reduction of carbon dioxide (CO2RR) stands as a pivotal pathway for mitigating atmospheric CO2 levels and realizing carbon neutrality objectives. Among the investigated metal elements, copper (Cu) has emerged as a key heterogeneous catalyst capable of facilitating the formation of C2+ products in CO2RR. However, challenges persist, including subpar activity and selectivity in CO2RR, hampering the widespread application of Cu-based catalysts. The construction of single-atom sites represents a promising strategy to enhance the catalytic efficiency of CO2 conversion. Heteroatom doping offers a means to alter the coordination environment and influence the electronic state of active sites. Single-atom alloy catalysts (SAAs), with their distinctive structure and superior catalytic selectivity, have emerged as significant players in the realm of CO2RR. This review work provides a comprehensive summary of recent advancements in Cu-based SAAs for CO2RR, with particular emphasis on synthesis strategies and selective CO2 conversion. Ultimately, this review aims to offer fresh insights into the design and preparation of Cu-based SAAs for enhanced CO2RR performance.