(3月5日)CO production from CO2 over Ag-Zn/Ga2O3 photocatalyst in aqueous solution using water as an electron donor
新闻类型:学术活动  阅读次数:  发布时间:2018-01-29

报告题目:CO production from CO2 over Ag-Zn/Ga2O3 photocatalyst in aqueous solution using water as an electron donor

人:Prof. Tsunehiro Tanaka (田中庸裕,日本京都大学 

报告时间:201835(星期一) 上午10:30-12:00

报告地点:福州大学阳光科技大厦北911

 

 

 

报告摘要

 

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. 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.

 

 

Catalyst: Ag(1.0wt%)/ZnGa2O4(3mol%)/Ga2O3, 1.0 g, Solution: H2O, 1.0 L, Concentration of NaHCO3: 0.1 M, Flow rate of CO2: 30 ml/min, Reaction temp. : R.T., Light source : 400 W Hg lamp, Photo irradiation time: 7 h.

Although we could find highly active photocatalyst, still there remain some issues to be solved:

1) Enhancement of CO evolution; 2) Simultaneous formation of oxidized products, O2; 3) Utilization of visible light.

In the lecture, I will show our trials toward the solutions of 1) and 2).Unfortunately, the trial solving the issue 3) will be left in the future.

References:1. K. Teramura, Z. Wang, S. Hosokawa, Y. Sakata, T. Tanaka, Chem. A Europ. J., 2014, 20, 9906.2. Z. Wang, K. Teramura, S. Hosokawa, T. Tanaka, J. Mater. Chem. A, 2015, 3, 11313.3. Z. Wang, K. Teramura, Z. Huang, S. Hosokawa, Y. Sakata, T. Tanaka , Catal. Sci. Technol., 2016, 6, 1025.4. H. Zeai, K. Teramura, S. Hosokawa, T. Tanaka, Appl. Catal. B., 2016, 199, 272.5. K. Teramura, K. Hori, Y. Terao, Z. Huan, S. Iguchi, Z. Wang, H. Asakura, S. Hosokawa, T. Tanaka, J. Phys. Chem. C, 2017, 121, 8711.6. R. Pang, K. Teramura, H. Asakura, S. Hosokawa, T. Tanaka, Appl. Catal. B, 2017, 218, 770.7. Z. Huang, K. Teramura, H. Asakura, S. Hosokawa, T. Tanaka, Chem. Sci., 2017, 8, 5797

报告人简介

 

 

Tsunehiro TaNaKa教授,现任日本京都大学工程学院分子工程系教授,1987年于日本京都大学化学专业获得博士学位,1987-1990年在美国北海道大学化学系(Department of Chemistry, Faculty of Science, Hokkaido University)做助理教授,1990年进入日本京都大学工程学院工作。1996年在中国兰州物理化学研究所担任客座教授。1996年在意大利都灵大学物理无机材料化学系担任客座学者。目前担任日本京都大学催化剂与电池元素战略计划主任,英国皇家学会《Catalysis Science & Technology》副主编。曾获得“日本催化协会青年科学家奖”。目前主要从事多相光催化研究;机动车催化剂元素战略研发;催化反应表征研究等。

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