In　an　attempt　to　construct　efficient　photocatalytic　H2　production　system,　designing　a　practical　way　to　integrate　co-catalyst　and　semiconductor　is　of　great　importance　for　future　commercialization.　Herein,　we　report　a　facile　one-pot　loading　of　CdS　onto　WC　through　the　facile　solid–liquid　mixing　method.　The　resultant　visible　light-responsive　WC-supported　CdS　photocatalyst,　at　different　WC　wt.%,　is　assessed　in　photocatalytic　hydrogen　production,　with　lactic　acid　as　an　electron　donor.　Experimental　results　confirmed　the　positive　effects　of　WC,　with　3　wt%　WC-loaded　CdS　photocatalyst　(CdS/WC)　exhibiting　the　highest　hydrogen　evolution　rate　of　9180　μmol　h−1　g−1.　Such　achievement　is　associated　to　2.1　and　43　folds　activity　improvements　from　that　of　CdS/Pt(3　wt%)　and　pure　CdS　photocatalysts,　respectively.　Meanwhile,　an　apparent　quantum　efficiency　(AQE)　of　14.3%　was　also　recorded　by　the　same　photocatalyst　from　the　single-wavelength　photocatalytic　reaction　at　420　nm.　All　these　enhancements　can　be　attributed　to　the　incorporation　of　WC,　which　extending　and　improving　the　light　absorbability　of　CdS.　Concurrently,　the　adjoining　WC　also　provides　rapid　electron　transfer　channel　and　water　reduction　site,　which　facilitate　the　spatial　separation　of　charges　while　promoting　the　kinetics　of　hydrogen　production　reactions.　This　study　presents　a　facile　synthesis　method　for　CdS/WC　photocatalyst,　which　offers　high　reliability　for　industrial　scale　hydrogen　production.　©　2022　Elsevier　B.V.