Ternary transition sulfides as novel anode materials for a hydrogen sulfide solid oxide fuel cell
Vitaly Vorontsov, PhD student in Materials Engineering
A new series of Mo, V and Cr ternary sulfide based materials of the general type AB2S4 have been studied as anode catalysts for SOFC operating on H2S fuel. Anode polarization resistances and overall fuel cell performances were measured in two different electrolyte-supported configurations in 700-900°C temperature range. Vanadium based ternary sulfides showed superior performance and stability compared with previously investigated Mo-Ni-S state of the art anodes. Impedance spectroscopy was employed to study the effects of feed composition, temperature and electrode preparation procedure on materials polarization resistance. Several processes were identified to contribute to overall performance drop. An attempt to determine their nature and dependences has been made.
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