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대한화학회 제124회 학술발표회 및 총회 Insight into the role of a host-dopant in co-doping systems for efficient water splitting devices

등록일
2019년 8월 22일 14시 56분 25초
접수번호
1169
발표코드
ELEC.P-420 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 17일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
Electrochemistry
저자 및
공동저자
Ki-Yong Yoon, Ji-Hyun Jang1,*
Chemical Engineering, Ulsan National Institute of Science and Technology, Korea
1Eco-Friendly Energy Engineering, Ulsan National Institute of Science and Technology, Korea
Doping engineering is of key importance for controlling the electrical, optical and structural properties of the semiconductor. Doping a naturally abundant hematite photocatalyst with heteroatoms is especially essential to boost its poor electrical properties for enhanced photocatalytic water splitting. For some impurities that create an unfavorable thermodynamic equilibrium, doped hematite with a reasonable photoelectrochemical performance needs to be synthesized under elaborate experimental conditions, which severely restricts the realization of hydrogen economy. To properly exploit cost competitive hematite as a photocatalyst for water splitting, it is crucial to seek an innovative doping strategy with thermodynamic equilibrium control. Here we show that the high formation energy of a Si-doped hematite can be decreased with the introduction of a host Ti-dopant via a thermodynamically favorable equilibrium process, making very easy and cost-efficient solution-based Si-doping possible.

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