Electron-rich Cu0-Cu2O Heterogeneous Interface Constructed Via Controllable Electrochemical Reconstruction for a Single CO2 Deep-Reduction Product Ethylene

Present Cu -based catalysts are prone to yield various reduction products and small current densities in electrocatalytic CO2 reduction. We now construct heterostructured Cu-0-Cu2O nanoparticles on the surface of coal matrix using electrochemical reconstruction and PTFE surface modification. The introduction of PTFE modulates the reconstruction process and induces the exposure of only a single -type Cu2O crystal on its surface, leading to a single deep -reduction product ethylene accordingly. The electron -rich heterogeneous interface formed by internal Cu-0 and external Cu2O optimizes the local electron density of surface Cu2O active sites, promoting the rapid protonation of *CO to *CHO and improving the catalytic tendency toward ethylene. The combination of highly conductive and robust coal matrix with hydrophobic PTFE suppresses competing side reactions and enhances the catalytic activity and selectivity to ethylene. Consequently, the Cu -based catalyst achieves the enhanced tendency for ethylene (93%), faradaic efficiency (62%) and industrial -grade current density (142.4 mA cm(-2)).