| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
In order to develop an energy-saving insoluble anode for Zn electrowinning, Pb-based anodes in which catalyst powders of low oxygen evolution overpotential were spread over the Pb substrate were prepared by powder-rolling method and the effect of the catalyst powder on lowering of the anode potential was investigated. It was clearly shown by galvanostatic electrolysis and anode polarization measurement that the RuO2 powder dispersed to the Pb substrate was effective in reduction of oxygen evolution overpotential. The anode potential of Pb-RuO2 anode fell remarkably around RuO2 content of 0.60 mass%, and the anode potential of the Pb-based anodes containing 0.70-1.50 mass%RuO2 was 300-350 mV lower than that of the pure Pb anode.
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