Efficient,　inexpensive　and　stable　electrocatalysts　are　challenging　and　desperately　required　in　order　to　complement　the　water　electrolysis　of　noble　metal　catalysts.　Herein,　a　porous　nitrogen-doped　carbon　wrapped　Co-Mo2C　dual　Mott–Schottky　heterostructure　has　been　successfully　fabricated　by　carbonization　of　Co-Zn　bimetal　metal-organic　framework　(MOF)　for　water　electrolysis.　The　heterostructure　is　found　to　feature　with　Co　and　Mo2C　nanoparticles　uniformly　encapsulated　in　the　highly　porous　leaf-like　N-doped　carbon　nanosheet　matrix.　Such　a　thin　porous　dual-Mott–Schottky　configuration　can　afford　abundant　surface　active　sites　and　the　boosted　electron　transfer　to　promote　the　water　splitting.　As　for　hydrogen/oxygen　evolution　reaction　(HER/OER),　it　has　demonstrated　fast　kinetics　and　low　overpotentials　of　92　mV　(HER)　and　338　mV　(OER)　at　a　current　density　of　10　mA　cm−2　in　1　M　KOH.　Furthermore,　the　overall　water　splitting　is　stably　delivered　with　a　low　cell　voltage　of　1.68　V　at　10　mA　cm-2　in　1　M　KOH.　Density　function　theory　(DFT)　calculations　demonstrate　that　the　interface　correlation　is　favorable　to　water　transfer　by　electron　and　speeds　up　adsorption　and　water　dissociation.　The　work　here　opens　up　interesting　possibilities　for　the　rational　design　and　innovation　of　MOF　derived　Mott–Schottky　electrocatalysts　for　highly　efficient　water　electrolysis.　©　2020　Elsevier　B.V.