Effect of H2S and HCl contaminants on nickel and ceria pattern anode solid oxide fuel cells

In this study, with the motivation of elucidating effect H2S and HCl on solid oxide fuel cell anodes, nickel ceria pattern anodes are prepared yttrium-stabilized zirconia electrolyte, their performance is tested using electrochemical impedance spectroscopy. However, it has been found that while adversely impacts both ceria, poisoning caused reversible for only partially ceria. Poisoning kinetics similar fast materials, recovery slower than nickel. High sulfur coverage rate-limiting factor inferred from elementary kinetic modeling. Unlike H2S, presence appeared to be favorable oxidation as polarization resistance electrode cells decreased upon feeding contaminated hydrogen gas. Similar behavior not reported previously, conclusion regarding underlying mechanisms requires further investigation.