scheme7

Scheme 7. Electrochemical reduction of unsaturated C–C bonds. (A) Electrochemical CPET to C–C bond using a catalytic molecular mediator. Copyright 2021, American Chemical Society[65]; (B) Cobalt-electrocatalytic HAT for hydrogenation of alkenes. Copyright 2022, Springer Nature[66]. CPET: Concerted proton-electron transfer; HAT: hydrogen atom transfer.