Synthesis and characterization of a doubleperovskite anode for solid oxide fuel cells
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2016
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BRAZILIAN MRS MEETING, 15th
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Resumo
Solid oxide fuel cells are one of the most efficient devices for the direct
conversion of the chemical energy of a fuel into electricity. Nonetheless, standard
solid oxide fuel cells (SOFC) with Ni/yttria-stabilized zirconia cermet anode have a
serious decrease of their lifetime when fed with carbon-containing fuels due to
coke formation. Ceramics with perovskite structure have been pointed out as
good candidates to anodes. In this study, the Pr0.5Ba0.5MnO3 was used as the
precursor phase of the double perovskite PrBaMn2O5+δ (PBMO), present at
reducing conditions. The transport and catalytic properties were studied in the
pristine compound and in Ru-doped samples Pr0.5Ba0.5Mn1-xRuxO3 (Ru-PBMO). Ru
substitution at the B-site is expected to enhance the catalytic properties of the
ceramic toward ethanol for SOFC’s running on such fuel. Simultaneous
thermogravimetric and differential thermal analysis (TG/DTA) were used to
monitor the thermal evolution of polymeric resins up to 1400 °C. Ceramic
powders were characterized by X-ray diffraction (XRD), scanning electron
microscopy (SEM) and transmission electron microscopy (TEM) analyses. The
electrical properties of sintered samples were evaluated by dc 4-probe technique,
in the 25 - 800 °C temperature range. The TG/DTA and XRD data show mass loss
stabilization and crystalline phase formation occurring at ~800°C. The evolution
of the XRD pattern upon calcining temperature indicated the formation of single
phase of Ru-PBMO samples at ~1100°C. The initial results suggest that PBMO
and PBMO-Ru compounds are promising SOFC anodes for carbon containing
fuels.
Como referenciar
MONTEIRO, NATALIA K.; SILVA, GABRIEL A.C. da; FONSECA, FABIO C. Synthesis and characterization of a doubleperovskite anode for solid oxide fuel cells. In: BRAZILIAN MRS MEETING, 15th, September 25-29, 2016, Campinas, SP. Abstract... p. 648-648. Disponível em: http://repositorio.ipen.br/handle/123456789/27427. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.