Efficient CO2 reduction to CO + CH4 at CuCo@NC cathode integrated with CH3OH oxidation to methylal at Pt anode in ionic liquid electrolyte

N-doped carbon encapsulated Cu–CoO (CuCo@NC) exhibits high FE (99.1%) for CO 2 eRR to CO + CH 4 , coupled with the anodic oxidation of CH 3 OH to dimethoxymethane in EmimBF 4 –methanol electrolyte, partly substituting for OER and hindering competing HER.