<p>Hydrogen species participate in the whole process of electrochemical CO₂ reduction, which is traditionally treated as a negative factor from the competitive hydrogen evolution reaction. Here, we illustrate for the first time that the rapid transfer of hydrogen species can significantly promote the deep reduction of CO₂ to ethylene products on copper-based catalysts. We construct a hydrogen transfer channel on Cu₂O nanowires by introducing a conductive copper meso-tetra(4-carboxyphenyl)porphine (Cu-TCPP) layer, where the Cu nodes can adsorb H₂O and the coordinated carboxyl group can adsorb H_ad simultaneously. The hydrogen species from the bulk solution are transferred to the CO₂ reduction step by forming H₃O⁺ with target H₂O and exchanging with the adsorbed H_ad. Density functional theory (DFT) calculations reveal that the channel eventually facilitates the continuous exothermic hydrogenation reaction of the C₂ intermediate towards ethylene production, which accelerates the ethylene generation with the highest faradic efficiency of 78.6% in neutral conditions in H-cells.</p>