Electrooxidation of nitrite on a silica-cerium mixed oxide carbon paste electrode

► Highly dispersed silica-cerium mixed oxides are obtained by the sol-gel method. ► Cerium ions are present with oxidation states III and IV in the mixed oxide. ► The charge transfer resistance for the material was 32 Ω cm−2. ► Electrooxidation of nitrite without electron mediators was observed.