121st General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code MAT.P-420
Subject Transition Dichalcogenide Nanocrystals for Photoelectrochemical Hydrogen Production
Authors SuYoung Lee, jeunghee park1,*, eunhee cha2,*, SooA LIM2,*
Deapartment Green Energy Engineering, Hoseo University, Korea
1Department of Materials Chemistry, Korea University, Korea
2Department of Pharmaceutics, Hoseo University, Korea
Abstract Photocatalysts for hydrogen evolution reactions (HER) are central to key renewable energy technologies of water splitting. Despite tremendous effort, the development of low-cost electrode catalysts with high activity remains a great challenge. In this study, we report the transition metal dichalcogenide (TMD) layered two-dimensional (2D) materials as excellent photocatalysts for water-splitting reactions. We fabricated a Si-based photocathode by depositing the TMDs nanocrystals onto an p-type Si nanowire array, showing efficient photoelectrochemical (PEC) hydrogen evolution under visible light irradiation. Band alignment suggested that the efficiency of the PEC cell is ascribed to the buildup of the space charge region in the heterojunction, as well as the band bending of n-Si at the electrolyte interface.
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