Electrochemical and Catalytic Properties of Ni/BaCe0.75Y0.25O3-delta Anode for Direct Ammonia-Fueled Solid Oxide Fuel Cells

摘要

In this study, Ni/BaCe0.75Y0.25O3-delta (Ni/BCY25) was investigated as an anode for direct ammonia-fueled solid oxide fuel cells, The catalytic activity of Ni/BCY25 for ammonia decomposition was found to be remarkably higher than Ni/8 mol % Y2O3-ZrO2 and Ni/Ce0.90Gd0.10O1.95. The poisoning effect of water and hydrogen on ammonia decomposition reaction over Ni/BCY25 was evaluated. In addition, an electrolyte supported SOFC employing BaCe0.90Y1.10O3-delta (BCY10) electrolyte and Ni/BCY25 anode was fabricated, and its electrochemical performance was investigated at 550-650 degrees C with supply of ammonia and hydrogen fuel gases. The effect of Water content in anode gas on the cell performance was also studied. Based on these results, it was concluded that Ni/BCY25 was a promising anode for direct ammonia-fueled SOFCs An anode supported single cell denoted as Ni/BCY25 vertical bar BCY10 vertical bar Sm0.5Sr0.5CoO3-delta, Was also fabricated, and Maximum powder density Of 216 and 165 mW cm(-2) was achieved at 650 and 600 degrees C, for ammonia fuel respectively.