121st General Meeting of the KCS

Type Poster Presentation
Area Inorganic Chemistry
Room No. Event Hall
Time 4월 19일 (목요일) 11:00~12:30
Code INOR.P-151
Subject Selective and Efficient Reduction of CO2 through Ternary Hybrid System (Ir(III)-PS/TiO2/RePH): Immobilization effect of a Ir(III) Photosensitizer on TiO2
Authors Hayeon Cheong, Pil Soo Kim, Chul Hoon Kim, Sang Ook Kang, Ho-Jin Son*
Department of Advanced Materials Chemistry, Korea University, Korea
Abstract 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 and molecular Re(I) reduction catalyst on TiO2 semiconductor. The hybrid system consists of ([Ir(X)2(bpyPH)]+ (X = dfppy, ppy, btp; dfppy = 2-(2,4-difluorophenyl)pyridine ; ppy = 2-phenylpyridine; btp = (2-pyridyl)benzo[b]thiophen-3-yl; bpyPH = (4,4′-bis(methylphosphonic acid)-2,2′-bipyridine) as a visible-light photosensitizer and fac-[Re(4,4′-bis(methylphosphonic acid)-2,2′-bipyridine)(CO)3Cl] as a CO2 reduction catalyst (RePH), both of which have been fixed onto TiO2 semiconductors (Hombikat-TiO2). Overall the present Ir(III) complex-based hybrid series showed more durable, efficient catalytic activities compared to our previous binary system, Ir-PS + TiO2/RePH. Among four Ir(III)-based ternary systems, Ir-btp+-based hybrid exhibited the best conversion activity with its relatively higher visible light absorption coverage.
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