2020 Fiscal Year Final Research Report
Direct decomposition of nitrous oxide using open space and oxygen in the lattice
Project/Area Number |
19K15290
|
Research Category |
Grant-in-Aid for Early-Career Scientists
|
Allocation Type | Multi-year Fund |
Review Section |
Basic Section 26020:Inorganic materials and properties-related
|
Research Institution | Osaka University |
Principal Investigator |
|
Project Period (FY) |
2019-04-01 – 2021-03-31
|
Keywords | 環境触媒 / 亜酸化窒素 / 直接分解 / 希土類 |
Outline of Final Research Achievements |
In order to effectively remove nitrous oxide (N2O) which causes the global warming and the ozone layer depletion, I developed the novel catalysts for the direct N2O decomposition. I focused on Yb2O3 with the cubic C-type rare earth sesquioxide structure, which has the large open spaces in the lattice. In addition, Co2+/3+ or Cu+/2+ was introduced into the lattice to accelerate the decomposition reaction by supplying the lattice oxygen. As results, (Yb0.85Cu0.15)2O3-δshowed the highest activity, and decomposed N2O at the temperature as low as 400℃. Furthermore, I also demonstrated that the open space in the C-type structure worked as the N2O adsorption sites and the catalytic active sites.
|
Free Research Field |
環境触媒
|
Academic Significance and Societal Importance of the Research Achievements |
本研究では、温室効果に加え、オゾン層破壊効果もある亜酸化窒素を分解するため、触媒の格子内間隙および格子内酸素に着目し、これらを活用した新規な貴金属フリー触媒の創成を行った。その結果、亜酸化窒素を効率的に無害な窒素と酸素まで直接分解でき、かつ他ガス(酸素や水蒸気)共存化においても高い活性を維持できることを明らかにした。
|