Defect-Rich Porous Cu with Abundant Cu(100) for Acidic CO₂ Electroreduction in Membrane Electrode Assembly.

ABSTRACT: Acidic electrocatalytic CO₂ reduction (CO₂RR) faces slow C-C coupling kinetics and dominant hydrogen evolution, resulting in low C₂₊ yields and selectivity. Here, the porous copper nanosheets (pCu NS) are reported with abundant Cu(100) and defect sites for efficient acidic CO₂RR to C₂₊ products. In a membrane electrode assembly (MEA), the pCu NS electrodes achieved a remarkable 75.01% C₂₊ production Faradaic efficiency (FE) at a current density of 300 mA cm^-2 with a full-cell voltage of 3.8 V. A CO₂ single-pass conversion efficiency of up to 74.38% is achieved. In situ Raman spectra and density functional theory calculations revealed that pCu NS not only gives abundant nanopores and defect sites but als

SUBMITTER: Fang Q 

PROVIDER: S-EPMC12561329 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature