A possible mechanism for catalytic decomposition of hydrogen sulfide over molybdenum disulfide

The catalytic decomposition of hydrogen sulfide over molybdenum disulfide was studied by use of a closed circulation system at 500°C. The catalytic activity of MoS2 was remarkably enhanced by reduction with hydrogen but was not considerably increased by increasing the evacuation temperature. A possible mechanism was proposed for the catalytic decomposition of hydrogen sulfide over MoS2 where the coordinative unsaturation site of MoS2 surface formed by the reduction with hydrogen acts as the active site.