Developing　dual　functions,　high-performance　and　stable　catalysts　for　simultaneous　hydrogen　evolution　reaction　(HER)　and　oxygen　evolution　reaction　(OER)　at　high-current　density　is　highly　desirable　but　still　remaining　as　a　challenge.　Herein,　a　porous　sponge-like　structure　of　CrP-Re2P　composite　was　successfully　constructed　on　nickel　foam　(NF)　via　a　facile　hydrothermal,　drop　casting,　and　subsequent　phosphating　treatment.　Remarkably,　the　CrP-Re2P/NF　exhibits　extraordinary　performance　with　an　ultralow　overpoten-tial　of　148　mV　at　a　current　density　of　100　mA　cm(-2)　for　HER　and　255　mV　at　20　mA　cm(-2)　for　OER　in　1.0　M　KOH,　respectively.　In　addition,　the　bifunctional　catalyst　also　manifests　high-efficiency　overall　water　splitting　performance　that　drives　a　two-electrode　system　with　50　0/10　0　0　mA　cm(-2)　at　a　voltage　as　low　as　1.89/2.02　V　in　30%　KOH.　Moreover,　the　overall　water-splitting　device　can　achieve　superior　durability　for　100　h　at　a　current　density　of　100　mA　cm(-2　)without　obvious　degradation.　More　significantly,　the　CrP-Re2P/NF　is　used　as　the　cathode　of　alkaline　Zn-H2O　cell　with　a　power　density　of　8.8　mW　cm　(-2)　and　robust　stability　for　180　h,　indicating　that　the　catalyst　has　an　encouraging　industrial　perspective.　The　excellent　electrocatalytic　performance　of　CrP-Re2P/NF　is　mainly　attributed　to　the　porous　structure　exposing　more　active　sites,　high　conductivity　resulted　better　charge　transfer,　as　well　as　the　strong　synergy　between　CrP　and　(ReP)-P-2　species　to　regulate　the　binding　energy　with　reactant　intermediates.　The　strategy　provides　a　novel　and　feasible　approach　for　the　development　of　highly　efficient　and　stable　bifunctional　catalysts　for　overall　water　splitting　and　Zn-H2O　cell.(C)　2021　Elsevier　Ltd.　All　rights　reserved.