A Br− anion adsorbed porous Ag nanowire film: in situ electrochemical preparation and application toward efficient CO2 electroreduction to CO with high selectivity

An AgBr-derived porous Ag nanowire film with adsorbed Br⁻ anions shows a low onset overpotential of only 296 mV and a high CO faradaic efficiency of 96.2% at −0.6 V in CO₂-saturated 0.5 M KHCO₃.