화학공학소재연구정보센터
학회 한국공업화학회
학술대회 2018년 가을 (10/31 ~ 11/02, 제주국제컨벤션센터(ICC JEJU))
권호 22권 2호
발표분야 (특별세션) 전기촉매/광촉매 기반 화학연료 생산
제목 Catalytic Surface Specificity of Pt and Pt-Ni(OH)2 Based Electrocatalysts for Hydrogen Evolution Reaction in Alkaline Electrolytes
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.
저자 최상일
소속 경북대
키워드 Platinum; nickel; electrolysis; hydrogen evolution; alkaline
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