The recognized sulfur oxidation reaction (SOR) is performed in alkaline condition, and its main products of NaSx (x=1–4) are dissolvable, increasing chemical consumption to obtain solid Sx products by the multi-step recovery. Herein, the dopant of atomic carbon on MoS2 nanosheets (C-MoS2) was fabricated by chemical vapor deposition, and it can one-step convert H2S gas to solid S8 products in an acidic solution. Results showed that the yield of S8 product on C-MoS2 reached up to 2.5 kg/m2/d with a Faraday efficiency of 87.1 % at 20 mA/cm2. Moreover, theoretical and experimental studies proved that the electron density surrounding S active site increased with the incorporation of atomic C into MoS2, subsequently improving the adsorption energy of H2S and decreasing the reaction energy to obtain S8 product. Our work provides a new guideline for the SOR research on the one-step conversion of H2S to S8 solid products in acidic condition.