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NTIS 바로가기전기화학회지 = Journal of the Korean Electrochemical Society, v.23 no.2, 2020년, pp.25 - 38
유지선 (고려대학교 신소재화학과) , 차은희 (고려대학교 신소재화학과) , 박정희 (고려대학교 신소재화학과) , 임수아 (호서대학교 제약공학과)
Photoelectrochemical water splitting has been considered as the most promising technology for generating hydrogen energy. Transition metal dichalcogenide (TMD) compounds have currently attracted tremendous attention due to their outstanding ability towards the catalytic water-splitting hydrogen evol...
핵심어 | 질문 | 논문에서 추출한 답변 |
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광전기화학적 물분해의 구동력과 그 원리는? | 광전기화학적(photoelectrochemical, PEC) 물분해는 반도체 광전극, 기준 전극, 상대 전극, 전해질로 구성 된 전지 내에서 빛으로 광촉매 전극을 여기시키고 생성된 전자-정 쌍으로 물을 분해하는 방법이다. 띠 구부러짐 현상에 의해 전극 표면에 전위차가 생성되고, 이 전위차가 전자-정공의 재결합을 억제해 광효율이 증가한다. 또 각기 다른 전극에서 산화-환원 반응이 일어나므로 생성물을 분리하지 않아도 되고, 시스템이 단순하다. PEC 물분해는 1972년에 최초로 이산화 타이타늄(TiO2) 전극에 UV를 조사하여 성공하였고, 이로 인해 광전기화학적 물분해에 많은 관심이 쏠렸다. | |
대체 에너지의 특징은 무엇인가? | 따라서 차세대 대체 에너지원을 찾아야 하며, 이는 현시대의 인류가 반드시 해결해야 할 가장 큰 과제이다. 대체 에너지는 지속적이고, 재생 가능하며, 환경 오염을 일으키지 않고 산유국이 아닌 어느 나라에서나 생산되어야 한다. 그 중에서 수소 에너지는 국내에서도 주목받고 있으며 공기 중에서 깨끗하게 연소하여 환경친화적이다. | |
화석 연료의 사용량이 급증하며 발생한 문제는 무엇인가? | 화석 연료의 사용량이 급격히 증가함에 따라 자원 고갈, 지구 온난화, 대기 오염 및 심각한 환경 파괴 등 다양한 문제가 발생한다. 따라서 차세대 대체 에너지원을 찾아야 하며, 이는 현시대의 인류가 반드시 해결해야 할 가장 큰 과제이다. |
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