Construction of an electron-transfer channel via Cu–O–Ni to inhibit the overoxidation of Ni for durable methanol oxidation at industrial current density

A novel Cu–O–Ni channel with electron transfer from Cu to Ni was constructed to inhibit the overoxidation of Ni 3+ and guarantee reversible Ni 2+ /Ni 3+ cycling, which led to high methanol oxidation activity at elevated current density.