| 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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| 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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