Highly porous Ag-Ag2S/MoS2 with additional active sites synthesized by chemical etching method for enhanced electrocatalytic hydrogen evolution

- Porous Ag-Ag2S/MoS2 with additional active sites synthesized by chemical etching.
- This porous composite has excellent catalytic performance and durability for HER.
- The effects of cysteine on Ag-Ag2S/MoS2 catalysts were evaluated.
- Cysteine increases highly catalytic S edges as revealed by a low ratio of Mo to S.