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6月30日讲座:Photocatalytic Split of CO2 into CO from the Aqueous Solution over Photocatalyst

报告题目: Photocatalytic Split of CO2 into CO from the Aqueous Solution over Photocatalyst

Prof. Tsunehiro Tanaka, Kyoto University

开始时间: 2018-06-30 9:00

报告地点: 实验三楼102


报告人简介

DEGREES

Graduated in 1982 with Bachelor's degree from Kyoto University (Department of Hydrocarbon Chemistry, Faculty of Engineering)

1984 Master of Engineering, Kyoto University

1987 PhD in Chemistry, Kyoto University

PROFESSIONAL CARRIER

1987 Assistant Professor at Department of Chemistry, Faculty of Science, Hokkaido University1990 Assistant professor at Department of Hydrocarbon Chemistry, Faculty of Engineering Kyoto University

1993 Assistant professor at Department of Molecular Engineering, Graduate School ofEngineering, Kyoto University

1997 Associate professor at the same department

2004 Professor at the same department.

2012 Director at Elements Strategy Initiative for Catalysts & Batteries, Kyoto University

2013 Associate Editor, Royal Society of Chemistry, Catalysis Science & Technology

AWARD

1995 Catalysis Society of Japan Award for Young Researchers [XAFS study of the structural analysis of surface vanadate species over supported vanadium oxide]

2018 Catalysis Society of Japan Award (Academic field) [Development of efficient photocatalytic system on the basis of the reaction mechanism]

Abstract

Photocatalytic conversion of CO2 to reduction products, such as CO, HCOOH, HCHO, CH3OH, and CH4, is one of the most attractive propositions for producing green energy by artificial photosynthesis. Herein, we found that Ga2O3 photocatalysts exhibit high conversion of CO2. Doping of Zn species into Ga2O3 suppresses the H2 evolution derived from overall water splitting and, consequently, Zn-doped, Ag-modified Ga2O3 exhibits higher selectivity toward CO evolution than bare, Ag-modified Ga2O3. We observed stoichiometric amounts of evolved O2 and CO like CO2 splitting. Mass spectrometry clarified that the carbon source of the evolved CO is not the residual carbon species on the photocatalyst surface, but the CO2 introduced in the gas phase. Doping of the photocatalyst with Zn is expected to prevent H2 formation preserving the active site for CO synthesis.

  

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