Breaking the activity-stability trade-off of RuO 2 via a MnCo 2 O 4 electron buffer and heterointerface engineering for acidic oxygen evolution

This study develops a MnCo₂O₄/RuO₂ heterostructure that breaks the activity-stability trade-off in acidic oxygen evolution via electron buffering and interface engineering. This electrocatalyst achieves a low overpotential (180 mV@10 mA cm^-2) and exceptional stability (100 h@50 mA cm^-2), and enables efficient acidic water splitting (1.55 V@10 mA cm^-2).