Pore structure control of support-free catalyst utilizing neither platinum nor carbon and the performance enhancement of the catalyst layer for fuel cells
Project/Area Number |
17K06180
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Thermal engineering
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Research Institution | Hirosaki University |
Principal Investigator |
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Project Period (FY) |
2017-04-01 – 2020-03-31
|
Project Status |
Completed (Fiscal Year 2019)
|
Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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Keywords | 酸素還元 / 酸化チタン / 窒化チタン / カソード / 酸素還元反応 / 非白金 / 非貴金属 / 固体高分子形燃料電池 / 酸窒化物 |
Outline of Final Research Achievements |
Oxide catalysts have been developed in polymer electrolyte fuel cell cathodes to replace platinum-group-metal catalysts, while both the oxygen reduction reaction activity and the surface area remained moderate. In this study, the pore structure of titanium oxide catalysts was controlled by two methods; the one is the use of silica templates and the other is codoping of phosphor and nitrogen atoms. The latter significantly enhanced the activity and increased the surface area. A recently reported facile combustion method was modified by simply adding H3PO4 to the precursor dispersion. Pentavalent phosphor atoms were doped into both the bulk and surface to form new active sites without alternating the number of oxygen vacancy on the surface rutile TiO2, which was formed by nitrogen-doping. The catalyst loading was reduced to less than half of the previous phosphor-free catalysts while the activity was successfully enhanced by the phosphor-doping.
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Academic Significance and Societal Importance of the Research Achievements |
固体高分子形燃料電池正極に用いられている白金系触媒の希少性と、炭素担体の低い耐久性は、燃料電池車の本格普及に対する大きな障壁と考えられてきた。白金系触媒と炭素担体のいずれも用いない酸化物系材料は、燃料電池正極で安定であるものの、性能と比表面積が低いことが課題だった。新たにリン原子を酸化チタン相へ置換導入することにより、その性能と比表面積のどちらも向上することを初めて見出した点が、本研究の学術的意義である。上述した本格普及に対する二つの課題を解決し得る材料を、安価で簡易な手法で合成した点が社会的な意義である。
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Report
(4 results)
Research Products
(21 results)
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[Book] Electrocatalysts for Low Temperature Fuel Cells: Fundamentals and Recent Trends2017
Author(s)
Claude Lamy, N. Rajalakshmi, R. Imran Jafri, K.S. Dhathathreyan, Ayan Mukherjee, Suddhasatwa Basu, Thandavarayan Maiyalagan, Subbiah Maheswari, Viswanathan S. Saji, Mitsuharu Chisaka, Chilan Ngo, Michael J. Dzara, Sarah Shulda, Radoslav R. Adzic et al.
Total Pages
588
Publisher
Wiley-VCH
ISBN
9783527341320
Related Report
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