Metal nano-particles coagulate with
one another. Electrode catalyst activity decreases. This necessitates use of a large amount of rare metal (e.g.,
platinum). Reduction of platinum used is
a crying need in this field.
One solution has successfully been
presented. It is a metal nano-particle
solubilizing technology.
The new technology succeeded in
increasing the catalytic activity at the catalyst carried electrodes of the fuel
cell by 15 times when compared with the conventional technology.
Reducing the use amount of platinum to 1/100 will be
within the capability of the technology.
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