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Power generation performance and long‐term durability of ammonia‐fueled solid oxide fuel cell (SOFC) systems are investigated with SOFC stacks consisting of 30 planar anode‐supported cells. SOFC systems with three different operation modes are employed: direct ammonia, external decomposition and autothermal decomposition. A novel BaO/Ni/Sm2O3/MgO catalyst is newly developed for the external ammonia...
Several solid oxide fuel cell (SOFC) systems can be considered for the NH3 utilization. In this study, the catalytic activity and long‐term stability of the NH3 decomposition reactor with the Ni/Y2O3‐based catalysts and the autothermal NH3 cracker with the Co–Ce–Zr composite oxide catalyst were investigated. Moreover, the NH3 decomposition reactor and the autothermal NH3 cracker were combined with...
We report the results of high‐resolution transmission electron‐micrograph (TEM) observation, electron diffraction, and neutron diffraction (ND) measurements, which are sensitive to oxygen‐vacancies, for Ta‐oxide‐based oxygen‐reduction electrocatalysts used for polymer electrolyte fuel cells (PEFCs). Both TEM and ND results indicate that highly active tantalum oxide (Ta2O5) phase have an incommensurate...
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