Mo,Cu-doped CeO2 as anode material of solid oxide fuel cells (SOFCs) using syngas as fuel
Author
dc.contributor.author
Díaz Aburto, Isaac
Author
dc.contributor.author
Hidalgo, Jacqueline
Author
dc.contributor.author
Fuentes Mendoza, Eliana
Author
dc.contributor.author
González Poggini, Sergio
Author
dc.contributor.author
Estay, Humberto
Author
dc.contributor.author
Colet Lagrille, Melanie
Admission date
dc.date.accessioned
2021-09-10T18:42:30Z
Available date
dc.date.available
2021-09-10T18:42:30Z
Publication date
dc.date.issued
2021
Cita de ítem
dc.identifier.citation
J. Electrochem. Sci. Technol., 2021, 12(2), 246-256
es_ES
Identifier
dc.identifier.other
10.33961/jecst.2020.01571
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/181962
Abstract
dc.description.abstract
Mo,Cu-doped CeO2 (CMCuO) nanopowders were synthesized by the nitrate-fuel combustion method aiming to improve
the electrical and electrochemical properties of its Mo-doped CeO2 (CMO) parent by the addition of copper. An electrical
conductivity of ca. 1.22·10-2 S cm-1 was measured in air at 800oC for CMCuO, which is nearly 10 times higher than that
reported for CMO. This increase was associated with the inclusion of copper into the crystal lattice of ceria and the presence
of Cu and Cu2O as secondary phases in the CMCuO structure, which also could explain the increase in the charge transfer
activities of the CMCuO based anode for the hydrogen and carbon monoxide electro-oxidation processes compared to the
CMO based anode. A maximum power density of ca. 120 mW cm-2 was measured using a CMCuO based anode in a solid
oxide fuel cell (SOFC) with YSZ electrolyte and LSM-YSZ cathode operating at 800°C with humidified syngas as fuel,
which is comparable to the power output reported for other SOFCs with anodes containing copper. An increase in the area
specific resistance of the SOFC was observed after ca. 10 hours of operation under cycling open circuit voltage and polarization
conditions, which was attributed to the anode delamination caused by the reduction of the Cu2O secondary phase
contained in its microstructure. Therefore, the addition of a more electroactive phase for hydrogen oxidation is suggested
to confer long-term stability to the CMCuO based anode.
es_ES
Patrocinador
dc.description.sponsorship
Project Anillo en Ciencias y Tecnologia Topicos Mineria ACM170003
CONICYT-PIA Project AFB180004