Síntese do anodo cerâmico La1-xSr xCr0,5Mn0,5O3 pela técnica dos precursores poliméricos

Ramos, Marlon; Florio, Daniel Z. de; Fonseca, Fábio C.

doi:10.1590/s1517-70762007000100011

Cited by 1 publication

(3 citation statements)

References 12 publications

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“…The addition of ruthenium did not alter the transport mechanism of the LSCM, as indicated by calculated values of activation energy (Ea ~0,23 eV). Values of Ea ~0,23 eV are in agreement with the ones previously obtained for LSCM and are practically unchanged upon Ru addition (1,10). for the LSC10M-Ru, i.e., x = 0.10 Ru replacing Cr.…”

Section: Resultssupporting

confidence: 89%

“…6. The LSCM-Ru compounds exhibited thermally activated behavior and electrical conductivity values close to previously reported data (10,11). The electrical conductivity follows the mechanism of adiabatic polaron hopping in a wide temperature range (10).…”

Section: Resultssupporting

confidence: 85%

“…The LSCM-Ru compounds exhibited thermally activated behavior and electrical conductivity values close to previously reported data (10,11). The electrical conductivity follows the mechanism of adiabatic polaron hopping in a wide temperature range (10). The addition of ruthenium did not alter the transport mechanism of the LSCM, as indicated by calculated values of activation energy (Ea ~0,23 eV).…”

Section: Resultssupporting

confidence: 85%

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Ceramic Oxide Anode with Precipitated Catalytic Nanoparticles for Ethanol Fueled SOFC

Monteiro¹,

Nóbrega²,

Fonseca³

2011

ECS Trans.

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Carbon resistant and redox stable anodes have been intensively studied aiming at effective fuel-flex solid oxide fuel cells. Previous studies have demonstrated that La 0.75 Sr 0.25 Cr 0.50 Mn 0.50 O 3 (LSCM) perovskite has comparable performance in both hydrogen and methane fueled SOFCs. In the present study, LSCM compounds with partial substitutions of either Mn or Cr by Ru (LSCM-Ru) were synthesized and characterized. Thermal analysis and X-ray diffraction were used to study the thermal evolution of precursor resins and phase formation. The electrical properties were investigated by 4-probe measurements in the 25-800°C temperature range. X-ray diffraction data evidenced that single phase compounds were obtained at 1200°C, without significant structural distortions up to ~ 10 at.% Ru. The electrical resistivity data showed that the transport properties depend on the substituted cation. In addition, the formation of Ru nanoparticles on the surface of LSCM-Ru grains suggests that LSCM-Ru compounds have enhanced catalytic activity for carbon containing fuels.

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Section: Resultssupporting

confidence: 89%