Hollow　functional　materials　with　adjustable　morphologies　based　on　transition　metal　sulfides　have　been　considered　as　a　class　of　attractive　and　promising　electrocatalysts　for　multifarious　energy　conversion　devices.　Herein,　we　adopt　a　facile　template-engaged　method　to　synthesize　morphology-tunable　Ni–Fe–WSx　hollow　nanoboxes　by　changing　the　mass　ratios　(1/1,　1/2　and　1/3)　of　nickel　iron　Prussian-blue　analog　precursors　and　(NH4)2WS4.　During　the　above　processes,　(NH4)2WS4　acted　as　a　multifunctional　vulcanizator　to　supply　elements　of　S　and　W　simultaneously　and　the　surface　of　Ni–Fe–WSx　nanoboxes　became　rougher　with　the　increment　of　WS42−.　Noteworthy,　profiting　to　the　moderated　surface　morphology,　appropriate　doped　ratio　and　the　synergistic　effect　of　multiple　elements,　Ni–Fe–WSx-2　hollow　nanoboxes　not　only　possessed　higher　specific　surface　and　well-defined　interior　voids　but　also　performed　excellent　catalytic　properties　on　promoting　the　reduction　of　I3−　comparing　to　Ni–Fe–WSx-1,　Ni–Fe–WSx-3　and　Ni–Fe–S　in　dye-sensitized　solar　cells　(DSSCs).　As　expected,　the　DSSC　prepared　with　a　Ni–Fe–WSx-2　counter　electrode　(CE)　possessed　a　higher　value　of　power　conversion　efficiency　(PCE)　about　9.86%　which　was　more　remarkable　than　that　of　Pt　(8.20%).　©　2020　Elsevier　B.V.