Surface modification of Pt with Ni(OH) 2 is a prime example of a bifunctional electrocatalyst for alkaline HER. As suggested, Ni(OH) 2 promotes water dissociation, and the hydrogen intermediates subsequently adsorb and combine on the Pt surface , relying on tailoring catalytically active interfaces. Another approach for improving Ni performance is enhancing interfacial processes related to fast removing adsorbed hydrogen, like interfacing with reduced graphene oxide, which stimulated Hads spillover and improved HER activity while maintaining excellent stability . Despite numerous approaches to boost the HER activity of Ni, which work well in practice, a fundamental understanding of the key interactions in catalytic systems is of utmost importance.