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제123회 대한화학회 학술발표회, 총회 및 기기전시회 안내 An Investigation on Photocatalytic CO2-to-CO Conversion Activities of Heteroleptic [Ir(C^N)2(N^N)]+-type Complexes-Sensitized TiO2 Ternary Hybrids (IrPS/TiO2/Re(I))

등록일
2019년 2월 14일 14시 20분 03초
접수번호
4427
발표코드
INOR.P-110 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 18일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
Inorganic Chemistry
저자 및
공동저자
Sunghan Choi, Ju Hyoung Jo, Daehan Lee, Chul Hoon Kim, Sang Ook Kang, Ho-Jin Son*
Department of Advanced Materials Chemistry, Korea University, Korea
Herein, we report a detailed investigation of efficient hybrid photocatalysts system for carbon dioxide reduction. The system is based on a co-assembly of Ir(III) photosensitizer (Ir-PS) and molecular Re(I) reduction catalyst on TiO2 semiconductor. The hybrid system consists of cationic iridium(III) complexes [Ir(C^N)2(N^N)]+ (dfppyIrP, C^N = 2-(2,4-difluorophenyl)pyridine (dfppy); ppyIrP, 2-phenylpyridine (ppy); btpIrP, 2-(benzo[b]thiophen-2-yl)pyridine (btp); piqIrP, 1-phenylisoquinoline (piq); N^N = 4,4′-X2-bipyridine (X = CH2PO(OH)2)) as a visible-light photosensitizer and fac-[Re(4,4′-bis(methylphosphonic acid)-2,2′-bipyridine)(CO)3Cl] as a CO2 reduction catalyst (ReP), both of which have been fixed onto TiO2 semiconductors (Hombikat-TiO2). Overall the present Ir(III) complex-based hybrid series showed the most durable, efficient catalytic activities compared to typical homogeneous (Ir-PS + ReP) and our previous binary system (Ir-PS + TiO2/ReP). Among four XIrP-sensitized TiO2 hybrids, btpIrP/TiO2/ReP hybrid exhibited the best conversion activity with its relatively higher visible light absorption coverage.

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