Fig. 1: Strategies for HER catalyst finding and the C–H functionalization of N-allylimine.
From: Bimetallic [Co/K] hydrogen evolution catalyst for electrochemical terminal C-H functionalization

a The structure of [NiFe] and [FeFe] hydrogenases. b Reported strategies for HER catalysts. c The structure of cobalt/alkali-Salen HER catalyst. d The C–H functionalization of N-allylimine. AM alkali metal.