| 초록 |
Hydrogen evolution reactions have been studied since it can generate carbon-free fuels from the water by using the renewable energy. Among various catalysts for HER, molybdenum carbides have been gotten an attention for hydrogen generation reaction study due to their chemical and physical stability, good catalytic property and electric conductivity. Recently, some papers have reported that the sulfur atoms can act as active sites for water splitting. Herein, we synthesized sulfur doped molybdenum carbide which showed significant catalytic property for generating hydrogen. As the sulfur concentrations increased, the elctrochemical performance enhanced because the sulfur acts as active site for HER. On the other hand, the over-doped sulfur sample resulted in generating molybdenum disulfide island on the surface which means hiding the active surface sites. Compared to the commercial molybdenum carbide, the 7.20wt% sulfur doped Mo2C showed reduced potential 167.96mV up to -1.5mA/cm2 |
