Low-cost　catalysts　possessing　merits　of　high　conductivity　and　plenty　of　active　sites　are　highly　desirable　for　the　developing　of　Pt-free　counter　electrode　(CE)　in　dye-sensitized　solar　cells　(DSCs).　In　this　study,　porous　sulfur-doped　reduced　graphene　oxide/MoS2　(S-rGO/MoS2)　composites　were　successfully　synthesized　via　a　simple　one-step　annealing　strategy　employing　CS2　as　sulfur　source.　Electrochemical　measurements　revealed　that　the　as-prepared　composite　presented　a　superior　catalytic　activity　on　the　triiodide　reduction　process,　comparable　with　Pt　electrode.　Under　optimized　conditions,　a　power　conversion　efficiency　of　6.96%　was　achieved　for　the　N719-sensitized　solar　cell　with　a　S-rGO/MoS2　CE,　which　is　very　close　to　that　for　the　device　containing　a　thermally　deposited　Pt　CE　(7.35%).　The　outstanding　electro-catalytic　activity　of　composite　was　attributed　to　the　exposed　numerous　edges　providing　much　more　active　sites,　and　good　conductivity　resulting　from　two-dimensional　conductive　networks　of　both　S-rGO　and　MoS2.　This　work　demonstrated　S-rGO/MoS2　composite　as　a　promising　alternative　for　noble　metal　Pt　in　triiodide　reduction　process　and　a　simple　approach　of　employing　two-dimensional　nanomaterials　as　multifunctional　materials　in　photovoltaic　for　mass　application.　(C)　2018　Elsevier　B.V.　All　rights　reserved.