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Yttria stabilized zirconia (YSZ) and calcia stabilized zirconia (CaSZ) electrolyte materials were tested in an intermediate temperature fuel cell using ammonia as a fuel. Silver, platinum and a nickel cermet were used as anode materials in an annular and a pellet design. At 800°C, the nickel cermet achieved ammonia conversions of more than 90%, significantly higher than those obtained with silver...