2022 Fiscal Year Final Research Report
Low Pt electrode catalysts with conductive metal oxide supports
| Project/Area Number |
20K15088
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 27030:Catalyst and resource chemical process-related
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| Research Institution | Kindai University (2022)
Kyoto University (2020-2021) |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 固体高分子型燃料電池 / 酸素還元反応 / 金属窒化物 / 金属酸化物 |
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| Outline of Final Research Achievements |
To solve the problem of corrosion of carbon supports in Pt catalysts for polymer electrolyte fuel cells (PEFC), we have developed highly active and durable supports for the oxygen reduction reaction electrode. Using indium oxide as a support, we found higher specific surface area activity and durability than those of conventional carbon-supported catalysts. Furthermore, we attempted to improve the electrical conductivity and other properties of In2O3 by doping it with different elements, but the improvement in activity was limited. We found that the use of indium nitride (Pt/InN), obtained by nitridation of indium oxide, as a support (Pt/InN) resulted in a high specific surface area activity, and that the addition of carbon nanotubes resulted in a mass activity that exceeded that of Pt/C.
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| Free Research Field |
触媒化学
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| Academic Significance and Societal Importance of the Research Achievements |
水素燃料自動車には炭素に希少元素である白金を混合させた触媒が大量に利用されている．本研究では白金が少量でも高い性能を発揮することを目標に，導電性金属酸化物である酸化インジウムおよび関連して窒化インジウムを利用することで従来の炭素を利用した者よりも高い活性を示すことを見出した．現時点では耐久性に問題があるため，さらなる改良が望まれる．また，大型放射光施設SPring-8における分析で，窒化インジウムを用いることで確かに白金が高い性能を示す状態に変化させることができたことを明らかにした．
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