Synthesis and performance of palladium-based electrocatalysis in alkaline direct ethanol fuel cell
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International Journal of Hydrogen Energy
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The present study reports the performance enhancement of alkaline direct ethanol fuel
cell (ADEFC) by using non-functionalized (Vulcan) and functionalized (Vulcan-F) carbon
supported Pd, PdSn, PdNi and PdNiSn anodic electrocatalysts produced by impregnationreduction method. The electrocatalysts are studied by thermogravimetric analysis (TGA),
X-ray diffraction (XRD), transmission electron microscopy (TEM), cyclic voltammetry (CV),
and ADEFC stability tests. TGA measurements of Vulcan evidence the characteristic weight
losses attributed to the presence of surface functional groups due to the acid treatment.
XRD shows that a higher degree of alloying is reached between Pd and Sn, whereas the Ni
in PdNi and PdNiSn exists mostly segregated in the oxide form. TEM analysis indicates an
agglomeration of Pd and PdSn particles, whereas a more uniform particle distribution is
observed for PdNi and PdNiSn samples. CV curves show that the onset potential is shifted
towards negative values for binary and ternary samples supported on functionalized
Vulcan (Vulcan-F) indicating that the ethanol oxidation is facilitated on the functionalized
surface. ADEFC fuel cell tests reveal that the highest open circuit voltage and maximum
power density are achieved for the PdNiSn supported on Vulcan-F in which the characterizations evidenced improved textural properties.
Como referenciar
MORAES, L.P.R.; MATOS, B.R.; RADTKE, C.; SANTIAGO, E.I.; FONSECA, F.C.; AMICO, S.C.; MALFATTI, C.F. Synthesis and performance of palladium-based electrocatalysis in alkaline direct ethanol fuel cell. International Journal of Hydrogen Energy, v. 41, n. 15, p. 6457-6468, 2016. DOI: 10.1016/j.ijhydene.2016.02.150. Disponível em: http://repositorio.ipen.br/handle/123456789/26502. Acesso em: 20 Mar 2026.
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