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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제121회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Highly Selective and Durable Photochemical CO2 to HCOOH Conversion via TiO2 Immobilization of Molecular Mn(I) Catalyst

2018년 2월 7일 13시 39분 02초
INOR.P-149 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (목요일) 11:00~12:30
Inorganic Chemistry
저자 및
Pil Soo Kim, Hayeon Cheong, So-Yoen Kim, Sunghan Choi, Chul Hoon Kim, Sang Ook Kang, Ho-Jin Son*
Department of Advanced Materials Chemistry, Korea University, Korea
The photochemical activity of hybrid catalyst (OrgD-|TiO2|-MnP) prepared by co-anchoring of Mn(4,4′-Y2-bpy)Br(CO)3 (MnP; Y = CH2PO(OH)2) and (E)-3-[5-(4-(diphenylamino)phenyl)-2,2′-bithiophen-2′-yl]-2-cyanoacrylic acid (OrgD) on TiO2 particles is reported. The Mn complexes immobilized on the OrgD-|TiO2 particle revealed an enhanced photocatalytic CO2 reduction activity with its high HCOOH selectivity (>99%) compared to the homogeneous Mn complex-based system, showing that the chemical CO2 process in present ternary Mn hybrid is mainly proceeded via a single mechanistic pathway. Under visible light irradiation, suspensions of OrgD-|TiO2|-MnP hybrid catalyst showed the most efficient CO2-to-HCOOH conversion activity in the presence of 0.0001 M LiClO2, reaching to a TONHCOOH of ~300 for >40 h. To our knowledge, it is the highest reported for visible-light driven CO2 reduction system particularly utilizing Mn catalyst as CO2 reduction catalyst. A detailed mechanistic investigation by in-situ FTIR analysis confirms that the catalytic CO2 conversion process via MnP mainly proceeded through the so-called monomeric mechanism (involving the formation of a Mn-hydride complex) as a result of the immobilization of molecular Mn catalyst on the TiO2 surface.