Among　the　various　non-precious　metal　catalysts　that　drive　hydrogen　evolution　reactions　(HERs)　and　dye-sensitized　solar　cells　(DSSCs),　transition　metal　selenides　(TMSs)　stand　out　due　to　their　unique　electronic　properties　and　tunable　morphology.　Herein,　the　multicomponent　selenide　CuSe-Co3Se4@VSe2　was　successfully　synthesized　by　doping　with　metal　element　vanadium　and　selenization　on　the　copper-cobalt　carbonate　hydroxide　(CuCo-CH)　template.　CuSe-Co3Se4@VSe2　exhibited　the　dandelion-like　cluster　structure　composed　of　hollow　nanotubes　doped　with　VSe2　nanoparticles.　Due　to　the　unique　structure　and　the　synergistic　effect　of　various　elements,　CuSe-Co3Se4@VSe2　showed　excellent　alkaline　HER　and　DSSC　performances.　The　DSSC　based　on　CuSe-Co3Se4@VSe2　exhibited　an　impressive　power　conversion　efficiency　(PCE)　of　9.64　%,　which　was　much　higher　than　that　of　Pt　(8.39　%).　Besides,　it　possessed　a　low　HER　overpotential　of　76　mV@10　mA　cm−2　and　a　small　Tafel　slope　of　88.9　mV　dec−1　in　1.0　M　KOH.　©　2024　Elsevier　Inc.