銅,インジウム,ニッケルおよびモリブデン酸化物粉末の電気化学的手法による水素還元

概要

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A closed system was constructed utilizing the chamber with oxide powders, a circulation pump, and the electrochemical oxygen pump: Pt, air/ZrO2(+Y2O3)/Ar+H2+H2O gas mixture, Pt. The oxygen chemical potential in the circulating Ar +H2 gas mixture was kept to a sufficiently low value through a potentiostatic operation, and the powders of Cu2O, In2O3, NiO and MoO3 were deoxidized by increasing the temperature at a constant rate. The performance of the apparatus was found to be excellent; the electric current corresponding to the deoxidation rate, plotted against time, exhibits characteristic curves for the respective powders; the lower detection limit is 10-810-9 g of O, and the ionic charge analyzed is in good agreement with the theoretical value. This type of apparatus appears to be useful as a research device in a laboratory and also for deoxidation of metal and oxide powders on an industrial scale.
社団法人粉体粉末冶金協会の論文