Development　of　electrocatalytic　hydrogen　production　technology　is　the　key　to　solving　environmental　and　energy　problems.　Two-dimensional　material　Mo2TiC2Tx　(T-x　=-OH,-F)　has　shown　great　potential　in　electrocatalytic　hydrogen　evolution　because　of　its　excellent　conductivity　and　hydrophilicity.　However,　due　to　the　lack　of　sufficient　active　sites　of　Mo2TiC2Tx　itself,　its　practical　applications　in　electrocatalytic　hydrogen　evolution　are　limited.　In　this　work,　a　highly-efficient　hydrogen　evolution　electrocatalyst,　namely　Pd@MoS2/Mo2TiC2Tx,　is　prepared　through　a　simple　pyrolysis　method.　In　such　a　composite,　the　MoS2　nanoflowers　hybridized　with　the　ammonia-treated　Mo2TiC2Tx　(MoS2/Mo2TiC2Tx)　are　used　as　a　substrate　for　loading　a　small　number　of　Pd　nanoparticles　(4.27　at.%).　Notably,　the　introduction　of　Pd　nanoparticles　into　MoS2/Mo2TiC2Tx　provides　abundant　active　sites　for　the　hydrogen　evolution　reaction,　improves　the　conductivity　of　the　electrocatalyst,　speeds　up　the　adsorption　and　desorption　of　hydrogen,　and　induces　a　synergistic　effect　with　the　MoS2.　As　a　result,　the　Pd@MoS2/Mo2TiC2Tx　catalyst　exhibits　excellent　electrocatalytic　performance　and　remarkable　stability　in　both　acidic　and　alkaline　media.　In　a　0.5　mol/L　H2SO4　electrolyte,　the　overpotential　of　Pd@MoS2/Mo2TiC2Tx　was　92　mV　with　a　Tafel　slope　of　60　mV/dec　at　a　current　density　of　10　mA/cm(2).　Meanwhile,　the　catalyst　displayed　an　overpotential　of　100　mV　associated　with　a　Tafel　slope　of　80　mV/dec　at　the　current　density　of　10　mA/cm(2)　in　a　1　mol/L　KOH　electrolyte.　This　work　shows　the　great　potential　of　using　Mo2TiC2Tx-based　material　in　the　field　of　electrocatalysis.　(C)　2022　Hydrogen　Energy　Publications　LLC.　Published　by　Elsevier　Ltd.　All　rights　reserved.