Unveiling Ag-Modulated Cu Active Sites for Enhanced Multicarbon Product Formation in CO₂ Electroreduction.

ABSTRACT: The development of innovative electrocatalysts for CO₂ reduction reaction (CO₂RR) is essential for producing high-value chemicals and fuels. Here, we report a simple surfactant- and solvent-free strategy to fabricate Cu-Ag bimetallic gas diffusion electrodes (GDEs) via sputtering of Cu onto a carbon substrate, followed by galvanic replacement with Ag. This method yields highly pure and tunable electrodes with minimal processing steps. The resulting CuAg GDEs exhibit a marked enhancement in CO₂RR performance compared to monometallic Cu, particularly in promoting C₂ (mainly ethanol and ethylene) product formation. This improvement is most pronounced when the galvanic replacement is carried out at 75 °C, yielding an optimal Ag/Cu ratio that maximize

SUBMITTER: Di Costola F 

PROVIDER: S-EPMC12415878 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature