2018 Fiscal Year Research-status Report
Environmental Degradation of Perovskite Electrode Surfaces in Solid Oxide Fuel Cells
| Project/Area Number |
18K05299
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| Research Institution | Kyushu University |
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Principal Investigator |
ステイコフ アレクサンダー 九州大学, カーボンニュートラル・エネルギー国際研究所, 准教授 (80613231)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Keywords | DFT / perovskite electrodes / degradation / SrTiO3 |
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| Outline of Annual Research Achievements |
We have studied the formation of a surface SrCO3 layer and various possible products of H2O interaction with the SrO surface, such as, surface chemisorbed water and the formation of a surface hydroxide layer. The co-adsorption of CO2 and H2O was explained both theoretically and experimentally showing that its products follow a complex temperature dependence and as a result, the surface composition may vary between carbonate and surface chemisorbed water. Our theoretical simulations have shown that the presence of water molecules in the gas phase might assist the molecular oxygen/lattice oxygen exchange reaction by stabilization of the surface oxo species in the transition state with a hydrogen bond mechanism.
J. Mater. Chem. A, 2018,6, 22662-22672
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
One paper has been published and a second paper will be submitted soon. I received invited talk on the SSI conference. The research is going as planned.
J. Mater. Chem. A, 2018,6, 22662-22672
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| Strategy for Future Research Activity |
Non-equilibrium Greens function calculations for electron exchange degradation as a result of formation secondary surface phases on SrTiO3 and La2NiO4 surfaces
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| Causes of Carryover |
Some of the budget was not spent because it is for software license annual support which is due in the next fiscal year
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