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학술발표회초록보기

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제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Triple-Deck 3D Photoanodes with Conformal Interfaces: Enhanced Photoelectrochemical Water Oxidation

등록일
2015년 9월 5일 19시 18분 49초
접수번호
1334
발표코드
MAT2-2 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 09시 : 35분
발표형식
심포지엄
발표분야
재료화학 - Recent Advances in Nanocatalysts
저자 및
공동저자
박종혁
연세대학교 화공생명공학과, Korea
The WO3/BiVO4 system is attractive for photoelectrochemical (PEC) water splitting processes because of the perfect synergistic effects in the heterojunction construction due to their well-matched band edge positions. However, the system suffers from poor charge collection and cannot be efficiently utilized because of non-ideal interfaces. Here, we report a triple-deck three-dimensional (3D) architecture that was designed through the ameliorative swelling-shrinking fabrication process by a polystyrene template, with a promising photocurrent density of 5.1 mA/cm2 at 1.23 V vs. RHE under AM 1.5G illumination. Using the uniformly distributed FeOOH/NiOOH oxygen evolution co-catalyst (OEC) layer as the outer most shell of the WO3/BiVO4/OEC triple-deck 3D structure, the water splitting efficiency was improved dramatically by facilitating the charge transfer process at the electrode/electrolyte interface. The highly open 3D macroporous nanostructure is helpful for the synthesis of the triple-deck 3D photoanodes with layer-by-layer distribution of WO3/BiVO4/FeOOH/NiOOH while promoting the water oxidation kinetics.

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