As　the　active　phase　for　most　nickel-based　electrodes　in　oxygen　evolution　(OER),　nickel　(oxy)hydroxides　(NiOOH)　suffer　from　insufficient　electrochemical　stability　at　large-current　OER　process　due　to　the　preferred　redox　into　γ　phase　with　limited　charging　reversibility.　Herein,　the　reconstruction　of　β-NiOOH　is　enabled　at　large-current　OER　through　constructing　FeS2@NiS2　heterostructure　to　induce　electronic-rich　environment　around　Ni　sites.　By　coupling　with　the　FeS2　reconstructed　FeOOH,　the　β-NiOOH@FeOOH　is　achieved　as　actual　active　phase　for　OER　and　features　much　superior　electrochemical　performance　and　stability　over　pristine　NiS2　reconstructed　γ-NiOOH,　with　the　ultralow　overpotential　of　220　mV　at　200　mA　cm–2　and　150　h　stably　operating　at　large　current.　Revealed　by　DFT　calculation,　the　strong　electronic　interaction　at　β-NiOOH@FeOOH　interface　not　only　enhances　the　electronic　conductivity　of　NiOOH,　but　also　tunes　the　d-band　center　of　Ni-d　orbitals　and　thus　optimizing　the　binding　strength　of　oxygen-containing　intermediates　for　accelerated　OER　kinetics.　©　2023　Elsevier　B.V.