| 초록 |
Because of natural scarcity and high cost for Pt-based catalysts that are typically used for hydrogen evolution reaction (HER), it is crucial to develop efficient catalysts based on non-precious metals for widespread application of electrolyzer. Kraft lignin is a by-product of the chemical pulping industry and most of them are incinerated generating carbon dioxide. For the valorization of industrial lignin, we have developed a simple and eco-friendly fabrication method for molybdenum carbide nanoparticles dispersed on nitrogen-doped carbon supports (Mo2C/NC) by annealing of MoCl5, kraft lignin, urea at 750 ℃ under N2 atmosphere in one-pot. Kraft lignin has a 3D network structure with high carbon content, which can act as carbon source for formation of Mo2C and carbon support during the synthesis. The nitrogen-doped carbon supports provided large surface area and high electrical conductivity. The resultant Mo2C/NC demonstrated efficient HER performance in alkaline solution with a low overpotential value of 131 mV at 10 mA cm-2. |
