At　present,　the　development　of　cheap　and　efficient　electrocatalytic　hydrogen　evolution　catalyst　is　of　great　significance　to　the　industrialization　of　hydrogen　energy.　In　this　work,　Mo2TiC2Tx　was　firstly　obtained　by　etching　Mo2TiAlC2　with　hydrofluoric　acid　(HF),　and　then　CoS2　nanoparticles　were　grown　on　the　surface　of　Mo2TiC2Tx　to　prepare　CoS2@Mo2TiC2Tx　catalyst　by　one-pot　hydrothermal　method.　The　hydrothermal　vulcanization　method　for　the　preparation　of　CoS2@Mo2TiC2Tx　electrocatalyst　not　only　saves　the　experimental　cost　but　also　has　higher　vulcanization　efficiency.　Due　to　the　synergistic　effect　of　CoS2　and　Mo2TiC2Tx,　the　CoS2@Mo2TiC2Tx　catalyst　exhibited　good　hydrogen　evolution　reaction　catalytic　activity　in　0.5　M　H2SO4;　at　a　current　density　of　10　mA/cm2,　the　overpotential　is　only　132　mV,　and　the　Tafel　slope　is　116　mV/dec.　Besides,　due　to　its　unique　morphology,　CoS2@Mo2TiC2Tx　still　exhibits　good　durability　after　24　h　of　continuous　electrolysis.　Therefore,　this　work　provides　a　possibility　to　realize　non-precious　metal　electrocatalyst　to　replace　Pt/C.　©　2023　Elsevier　B.V.