Designing　low-cost　catalysts　that　offer　both　high　mass　activity　and　high　cycling　stability　is　crucial.　Herein,　a　binder-free　3D　self-supporting　electrode　composed　of　carbo-nitride　tungsten　supporting　Pt　nanoparticles　(Pt@3DP-WNxC1-x/W)　has　been　successfully　synthesized　for　hydrogen　evolution　reaction　in　acid　electrolyte.　The　tungsten　carbo-nitride　synthesized　via　a　one-step　heat　treatment　exhibits　enhanced　conductivity　as　a　result　of　the　carbonization　process　and　optimizes　the　adsorption　and　desorption　properties　of　WC　towards　H　atoms　through　the　incorporation　of　N　atoms,　thereby　achieving　an　effective　balance.　Simultaneously,　the　N–Pt　bond　enhances　electron　transfer　efficiency.　This　electrode　exhibits　outstanding　electrochemical　performance　with　a　219　mV　overpotential　at　a　current　density　of　−300　mA　cm−2.　Its　current　density　and　mass　activity　is　up　to　75　mA　cm−2　and　7.5　A·mgPt−1　at　an　overpotential　of　100　mV,　respectively,　which　are　both　2.6　times　higher　than　those　of　the　40%　Pt/C　electrode.　In　addition,　it　reveals　a　low　Tafel　slope　of　38.3　mV　dec−1　indicating　rapid　kinetics.　Furthermore,　the　electrocatalyst　shows　only　3　mV　day　at　−100　mA　cm−2　after　10,000　cycles.　Both　theoretical　calculation　and　experimental　results　show　the　promotion　of　catalytic　efficiency　of　Pt@3DP-WNxC1-x/W　brought　by　carbo-nitrition.　This　study　offers　a　novel,　efficient,　and　stable　electrode　design　strategy.　©　2024　Elsevier　B.V.