A Cerium oxide Film Prepared from Molten Nitrates

摘要

In this paper, cerium oxide film was formed on nickel electrode at 453K in LiNO_3-KNO_3 molten salts. The molten salts background and the cathode process of Leeds on nickel electrode were studied by using cyclic voltammetry. The cathodic reaction mechanism of molten salts background was:O_2~-+e <=> O_2~(2-); O_2 +2NO_3~- → NO_2~- + 2O_2~-.According to the results of SEM and XPS, cerium oxide film, which is composed of CeO_2, can be formed on nickel electrode at -1.850V vs Ag/AgNO_3(0.1mol/l) reference electrode.