Finally, the ECH of C≡N triple bonds was studied using acetonitrile as a model substrate, since this is an interesting reaction to upgrade the excess acetonitrile manufacturing capacity to make value-added ethyl amine.(18) Notably, acetonitrile was hydrogenated into ethylamine with an overall yield of 86% after 7 h of electrolysis under similar reaction conditions (Fig. , Supplementary Figures and), demonstrating the broad scope of organic functional groups that can be hydrogenated on a Cu electrocatalyst, coherently with the computational predictions.