Abstract
Nickel/Yttrium-stabilized zirconia (Ni/YSZ) composite is the standard anode material with high stability and catalytic activity in both oxidation of H2 and reforming hydrocarbons. However, carbon is deposited on the surface of Ni catalyst in hydrocarbon atmosphere which is called coking. It leads to decrease in percolation, power density, and eventually crack. In this paper, 5 mol% of titanium Oxide (TiO2) and manganese oxide (MnO) are added to NiO/YSZ powder. Prepared mixed anode powder is applied on Ni/YSZ support button cell as functional anode. Hydrogen oxidation catalytic activities of sample anodes were measured by IV curve, and polarization resistances were measured by impedance spectroscopy analysis at 800 ˚C in dry H2 atmosphere. Ni/YSZ, 5 mol% MnO Ni/YSZ and 5mol% TiO2 Ni/YSZ cells showed power density of 628mW/cm2, 458mW/cm2 and 382mW/cm2 at 0.6V respectively. Cells survived in dry CH4 atmosphere for 16, 27 and 32 minutes without performance drop.
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