CoSx　materials　with　high　catalytic　activity　are　considered　as　promising　HER　electrocatalysts,　but　their　inherent　low　electrical　conductivity　and　easy　loss　of　active　sites　have　greatly　limited　their　applications　in　OER　electrocatalysis.　Herein,　we　present　a　convenient　method　to　synthesize　Co-Cu　hollow　nanoprisms　after　wrapping　and　calcining　with　trithiocyanuric　acid　(C3H3N3S3)　(denoted　N-Co-Cu-S-x　HNs).　The　results　showed　that　Cu　doping　modified　the　charge　density　of　Co　center,　leading　to　the　enhancement　of　the　intrinsic　activity　of　the　Co3S4　active　center,　meanwhile　wrapping　trithiocyanuric　acid　on　the　sur-faces　and　calcinating　to　form　N-containing　C　skeleton　as　a　flexible　substrate　to　encapsulate　the　catalysts,　which　effectively　protected　the　active　sites　inside　the　catalysts.　Notably,　the　OER　catalyst　that　was　opti-mized　by　adjusting　the　metal　ratio　and　controlling　the　trithiocyanuric　acid　incorporation　exhibited　a　low　overpotential　of　306　mV　under　a　current　density　of　10　mA　cm-2　and　showed　a　superior　durability　of　more　than　27　h.　This　work　may　provide　some　insights　into　the　preparation　of　oxygen　evolution　reaction　cata-lysts　with　excellent　performance　through　doping　transition　metals　and　protecting　the　internal　active　sites　strategies.(c)　2022　Elsevier　Inc.　All　rights　reserved.