Enhanced Electrode Activity of Ni/(CeO2)1−x(TiO2)x Anode in Electrochemical Oxidation of Methane

The electrode activity of a newly developed Ni/(CeO2)1−x(TiO2)x cermet anode has been investigated at intermediate temperatures. (CeO2)1−x(TiO2)x mixed oxide powders were synthesized by the sol-gel method. A single cell, Ni/(CeO2)1−x(TiO2)x|Sm0.2Ce0.8O3|Sm0.5Sr0.5CoO3, was fabricated using a samarium-doped ceria disk. The effect of incorporating TiO2 into the CeO2 matrix was studied with the goal of improving the anode micro structure. The modified micro structure of the new Ni/(CeO2)0.8(TiO2)0.2 cermet anode, which consists of fine Ni particles distributed on (CeO2)0.8(TiO2)0.2 mixed oxide particles, enhances the electrode activity in methane oxidation.