2021 Fiscal Year Annual Research Report
Opto-Electrical Analysis of the Oxygen Reduction Reaction at Solid-Gas Interfaces
| Project/Area Number |
18K13993
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| Research Institution | Kyushu University |
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Principal Investigator |
Klotz Dino 九州大学, カーボンニュートラル・エネルギー国際研究所, 助教 (00814849)
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| Project Period (FY) |
2018-04-01 – 2022-03-31
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| Keywords | oxygen evolution / thin films / ionic conductivity / impedance measurements |
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| Outline of Annual Research Achievements |
In this project, the interaction of light with solid-gas interfaces was analyzed. Various experiments with thin films of 3%Gd-dopedCeO2 (GDC, one of the most prominent materials for use in SOFC as electrolyte and part of composite electrodes). It was found out that the electronic structure, especially at the grain boundaries, is fundamentally affected by light above the bandgap. Also, the ionic conductivity is increased by the light, which is an important parameter for mixed ionic electronic conducting electrodes (MIEC). Collaboration with MIT was conducted. Due to the pandemic, only remote meetings were held.
The results found for the increase in ionic conductivity were so outstanding, that further focus was laid on this opto-ionic effect.
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| Remarks |
The first paper in the paper list created a lot of attention. It was featured on the Nature Materials cover (1), and it was reported in more than 20 news outlets.
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