The University of Tokyo · Energy
카즈나리 도메ン 교수의 연구실은 태양광을 이용한 수소 에너지 생산을 핵심 목표로 하며, 반도체 광촉매를 활용한 전체 수분해 기반의 청정 에너지 변환 기술 개발에 집중하고 있습니다. 특히 가시광선 영역에서 높은 효율을 보이는 타니움 기반 산화질화물(예: TaON, Ta₃N₅) 및 페로브스카이트형 질화물(예: LaMgₓTa₁₋ₓO₁₊₃ₓN₂₋₃ₓ) 촉매의 설계와 합성에 주력하고 있으며, Z-스키마 및 단일 촉매 시스템을 통한 전자-정공 재결합 최소화 전략도 연구하고 있습니다. 나노정렬된 광전극 구조를 활용한 고효율 광전기화학적 수분해 기술의 개발도 핵심 과제입니다.
Figures are computed from collected data and may differ slightly.
Overall water splitting based on particulate photocatalysts is an easily constructed and cost-effective technology for the conversion of abundant solar energy into clean and renewable hydrogen energy on a large scale. This promising technology can be achieved in a one-step excitation system using a single photocatalyst or via a Z-scheme process based on a pair of photocatalysts. Ideally, such photocatalysis will proceed with charge separation and transport unaffected by recombination and trappin
Under visible light irradiation (lambda = 420-500 nm), a tantalum oxynitride, TaON, functions as a stable and very efficient photocatalyst for oxidation of water into O2 with a sacrificial electron acceptor (Ag+).
A novel ZnIn2S4 catalyst synthesized by hydrothermal method shows high and stable photocatalytic activity for water reduction under visible light illumination.
One of the simplest methods for splitting water into H2 and O2 with solar energy entails the use of a particulate-type semiconductor photocatalyst. To harness solar energy efficiently, a new water-splitting photocatalyst that is active over a wider range of the visible spectrum has been developed. In particular, a complex perovskite-type oxynitride, LaMg(x)Ta(1-x)O(1+3x)N(2-3x)(x≥1/3), can be employed for overall water splitting at wavelengths of up to 600 nm. Two effective strategies for overal
The photodecomposition of water vapour proceeds steadily for more than 100 h on NiO–SrTiO3 powder and stops immediately when the water vapour is removed.
A vertically aligned Ta(3)N(5) nanorod photoelectrode is fabricated by through-mask anodization and nitridation for water splitting. The Ta(3)N(5) nanorods, working as photoanodes of a photoelectrochemical cell, yield a high photocurrent density of 3.8 mA cm(-2) at 1.23 V versus a reversible hydrogen electrode under AM 1.5G simulated sunlight and an incident photon-to-current conversion efficiency of 41.3% at 440 nm, one of the highest activities reported for photoanodes so far.
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