MoS2 confined on graphene by triethanolamine for enhancing electrocatalytic hydrogen evolution performance

The reduction of active sites due to reunion and slow electron transfer rates and low electronegativity greatly reduced the catalytic performance of many two-dimensional materials. In this paper, we synthesized composites for partially reducing graphene oxide and molybdenum disulfide (MoS 2 @prGO) by one-step hydrothermal method . With the addition of triethanolamine , MoS 2 is highly dispersed on the prGO carrier and converted into the 1T phase MoS 2 (50.4%). Meanwhile, it helps to increase the electron transfer rate of the MoS 2 @prGO composites. MoS 2 @prGO composites presents a high electron cloud density due to the existence of N atoms and prGO, which promotes the occurrence of hydrogen ion conversion hydrogen reaction and decreases the electrocatalytic hydrogen evolution overpotential. MoS 2 @prGO composites exhibits an overpotential of 263 mV at 10 mA/cm 2 and a small Tafel slope of 60 mV/dec. This work is devoted to offer a new prospect and direction for the improvement of electrochemical HER performance.