Taking the cue from nature, Wang et al36 reported a bioinspired catalyst, with the coexistence of Cu0 and Cu2+ connected to N atoms in reduced graphene oxide (rGO), exhibiting superior catalytic activity (onset potential 0.978 V vs. the reversible hydrogen electrode (RHE) and electron transfer number in the range from 3.7 to 4) with respect to conventional Pt/C in alkaline media.