Ulsan National Institute of Science and Technology · Energy
Ji-Wook Jang 교수의 연구실은 태양광을 이용한 수소 및 암모니아 생산을 핵심으로 하는 지속 가능한 에너지 기술 개발에 주력하고 있습니다. 특히 광분해를 통한 수소 생산을 위한 고효율 광전극 재료, 특히 희토류 산화물 및 유기 반도체 기반의 광안료 개발에 중점을 두고 있으며, 안정성과 비용 효율성을 동시에 확보하는 데 기여하고 있습니다. 또한, 이산화탄소 환원 및 질산염을 암모니아로 전환하는 전기화학적 반응 촉매 기술을 통해 탄소 순환 기반의 친환경 에너지 시스템을 구축하고자 합니다.
Figures are computed from collected data and may differ slightly.
Solar water splitting is a promising approach to transform sunlight into renewable, sustainable and green hydrogen energy. There are three representative ways of transforming solar radiation into molecular hydrogen, which are the photocatalytic (PC), photoelectrochemical (PEC), and photovoltaic-electrolysis (PV-EC) routes. Having the future perspective of green hydrogen economy in mind, this review article discusses devices and systems for solar-to-hydrogen production including comparison of the
Abstract The last few decades’ extensive research on the photoelectrochemical (PEC) water splitting has projected it as a promising approach to meet the steadily growing demand for cleaner and renewable energy in a sustainable and economically viable fashion. Among many potential photocatalysts, hematite (α‐Fe 2 O 3 ) emerges as a highly promising photoanode material with favorable characteristics including visible light absorption (a suitable band gap energy), earth abundance, chemical stabilit
Considering their superior charge-transfer characteristics, easy tenability of energy levels, and low production cost, organic semiconductors are ideal for photoelectrochemical (PEC) hydrogen production. However, organic-semiconductor-based photoelectrodes have not been extensively explored for PEC water-splitting because of their low stability in water. Herein, we report high-performance and stable organic-semiconductors photoanodes consisting of p-type polymers and n-type non-fullerene materia
Abstract Widespread application of solar water splitting for energy conversion is largely dependent on the progress in developing not only efficient but also cheap and scalable photoelectrodes. Metal oxides, which can be deposited with scalable techniques and are relatively cheap, are particularly interesting, but high efficiency is still hindered by the poor carrier transport properties (i.e., carrier mobility and lifetime). Here, a mild hydrogen treatment is introduced to bismuth vanadate (BiV
As a photocathode for CO2 reduction, zinc-blende zinc telluride (ZnTe) was directly formed on a Zn/ZnO nanowire substrate by a simple dissolution-recrystallization mechanism without any surfactant. With the most negative conduction-band edge among p-type semiconductors, this new photocatalyst showed efficient and stable CO formation in photoelectrochemical CO2 reduction at -0.2--0.7 V versus RHE without a sacrificial reagent.
Electrocatalytic nitrate reduction reaction (NO<sub>3</sub>RR) presents an innovative approach for sustainable NH<sub>3</sub> production. However, selective NH<sub>3</sub> production is hindered by the multiple intermediates involved in the NO<sub>3</sub>RR process and the competitive hydrogen evolution reaction. Hence, the development of highly efficient NO<sub>3</sub>RR catalysts is paramount. Herein, we report highly efficient bimetallic catalysts derived from hydroxy double salt (HDS). Under
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