| 초록 |
Hydrogen evolution reaction (HER) in alkaline media consumes massive electrical energy during water electrolysis owing to the sluggish reaction kinetics. Thus, the development of HER electrocatalysts remaines a great challenge. Recent researches have designed bimodal surface modified catalysts, such as noble metal-transition metal hydroxides composites, as promising candidates for enhancing the alkaline HER kinetics. In this bimodal system, the oxophilic metal hydroxides catalyze the dissociation of water and the formation of hydrogen intermediates, while the nearby noble metal surface converts hydrogen intermediate to H2 gas. This talk introduces an effective electrocatalyst based on Pt nanocrystals where Ni(OH)2 is formed on the surface during synthesis. The prepared bimodal Pt-Ni(OH)2 electrocatalysts exhibit catalytic surface specificity to improve HER activity, thus exceeding the performance of commercial Pt/C catalysts. |
