| 초록 |
Development of efficient electrocatalysts for hydrogen evolution reaction (HER) with earth-abundant, non-precious materials is crucial for practical large-scale hydrogen production from electrochemical water splitting. Molybdenum compounds (Mo-compounds) are attracting attention as a promising replacement for Platinum. Here we synthesized molybdenum carbide, nitride, and sulfide nanocrystals on CNT-graphene hybrid support via modified urea-glass route and their electrochemical activities for hydrogen evolution reaction were systematically investigated. Among the prepared catalysts, Mo2C/CNT-graphene (Mo2C/CNT-GR) showed the highest activity for hydrogen evolution reaction (HER) with small overpotential of 62 mV and Tafel slope of 58 mV/dec as well as an excellent stability in acid media. Vastly improved electron transfer characteristics by incorporating CNT-graphene hybrid and low hydrogen binding energy compared to the others are mainly responsible for the excellent activity. |
