“…Nevertheless, the more sluggish OER kinetics at the solid/liquid interface, [10,26] and lower electrical conductivity compared to RuO 2 or IrO 2 , [6,22,25,26,29] render the optimization of the system properties an imperative task in view of practical utilizations. [1,2,9,14] A promising strategy to overcome the first issue consists in MnO 2 surface decoration with highly dispersed nanoparticles (NPs) of suitable materials, that can improve charge separation and transport, and beneficially influence the overall water oxidation efficiency. [22,30,31] So far, the functionalization of MnO 2 with metallic or oxide NPs has in fact enabled to achieve an enhanced electrocatalytic activity.…”