Modification of thermally reduced graphite oxide and molybdenum disulfide by solution plasma for hydrogen evolution reaction

Thermally reduced graphite oxide and molybdenum disulfide (TRGO@MoS2) is synthesized and modified by using solution plasma for hydrogen evolution reactions (HER). The HER performance of TRGO@MoS2 increased with the plasma treatment time until 10 h and then saturated. Low overpotential of -64 mV at 10 mAcm(-2) with a small Tafel slope of 32 mVdec(-1) for HER, which is comparable to 30 mVdec(-1) of platinum, was obtained in TRGO@MoS2 after 10 h of the plasma treatment. The high HER performance attributes to the higher electro-chemical active surface area, lower impedance, and smaller crystalline size in comparison with the precursor, proving that the plasma treatment introduces active surface area with improved conductivity which is a major factor for the efficient HER performance.

Automated summary

Thermally reduced graphite oxide and molybdenum disulfide modified by solution plasma for hydrogen evolution reactions showed improved performance with increasing plasma treatment time, reaching saturation after 10 hours. The plasma treatment introduced active surface area with improved conductivity, leading to higher efficiency in the hydrogen evolution reactions.