In order to develop a cost effective route to fabricate solid oxide fuel cells (SOFC) with a proton conductive electrolyte, BaCe 0.9 Nd 0.1 O 3−δ (BCNO) powder was prepared by the modified Pechini method and a suspension of BCNO powder was then deposited as a thin layer by a spray process onto a NiO–BCNO anode. A bi-layer with very dense BCNO electrolyte was obtained by co-sintering at 1400°C for 5h. With La 0.5 Sr 0.5 CoO 3−δ (LSCO) as the cathode, single cells were assembled and tested with NH 3 and H 2 as fuels and static air as the oxidant. For a commercial liquid ammonia fuel at 700°C, the OCV and the peak power density of a cell with a 20μm thick BCNO electrolyte were 0.950V and 315mW/cm 2 , respectively. With H 2 fuel as a comparison, the values are correspondingly 0.951V and 335mW/cm 2 .