| 초록 |
Hydrogen is being considered as the most efficient environment friendly energy carrier, which can be produced directly by water splitting. Nowadays, Pt metal group shows the best HER performance; however, their disadvantages such as high cost and unstable supplies are drawbacks toward commercial scale-up application. Transition metal based catalysts may be the solution for this problem. In this work, we used C-dot as a structure-directing agent to obtain NiCoS nano-flower by solvothermal method. We synthesized sulfur doped NiCo, where sulfur enhances the conductivity and activity of catalysts. Herein, the synthesis temperatures were changed, ranging from 120 to 240 0C to get various synthesized catalysts. Among them, NiCoS synthesized at 150 0C shows the best HER performances. Furthermore, this catalyst maintains its catalytic activity for at least 12 h at current densities 10 mA cm−2. Therefore, this catalyst can be a promising candidate for hydrogen production. Key words: NiCo alloy, S-doping, Carbon dots, Nano-flower, Transition metal, Hydrogen Evolution Reaction. |
