Cu2O−Cu界面上的Cu+和Cu0协同促进电催化CO2还原高效和高选择性地生成C2+产物

The electrocatalytic CO2 reduction technology is expected to simultaneously alleviate increasing emissions and the depletion of fossil resources. However, it still a big challenge improve selectivity toward valuable multi-carbon products in reaction. In this study, synergistic role Cu+ Cu0 species Cu2O-Cu interfaces unravelled through density functional theory (DFT) calculations, which electrode surface exhibits low free energy *COCO intermediate formation H2O dissociation, are beneficial high towards products, especially C2H4. Guided by these DFT results, an oxide-derived copper activation strategy that builds on designed boost products. Interestingly, Cu2O cubes chosen as pristine catalyst activated via square-wave (SW) potential treatment form SW-Cu2O bear species. as-prepared exhibit superior Faradaic efficiencies for C2H4 (60%) C2+ (75%) H-type cell, about 1.5 times cubes. This study demonstrates improving specific product conversion.