Comparison of various atomic compositions of Au@Pd/C, Pd/C, and AuPd/C electrocatalysts for direct ethanol fuel cells
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2020
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Energy Storage
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Pd/C, Au@Pd/C (core-shell), and AuPd/C (AR—consisting in Au microparticles)
were used as electrocatalysts for ethanol oxidation in alkaline medium.
A synergistic effect between Au and Pd atoms in Au@Pd/C makes the binding
between ethanol and Au@Pd/C stronger. This leads to product formation in
higher potentials and can be useful to select ethanol products. We also showed
that the atomic composition of the electrocatalysts to be used in fuel cells and in
powder form to be used in electrochemical experiments are very similar,
reaching high values of correlation. The depth profiling X-ray photoelectron
spectroscopy for the anode catalysts to be used in fuel cells can provide new
insights about ethanol oxidation in direct ethanol fuel cells (DEFCs), for
instance, metal oxide species can act in fuel cells environment. In terms of electric
generation, Au@Pd/C presented a better performance in electrochemical
experiments; the current density was about 1.6 times higher than the peak current
density obtained for Pd/C. In terms of electrochemical stability, Au@Pd/C
presented better final current density when compared to Pd/C and AuPd/C electrocatalysts.
However, in DEFC experiments, Pd/C showed better performance.
Como referenciar
FONTES, ERIC H.; NANDENHA, JULIO; PIASENTIN, RICARDO M.; SOUZA, RODRIGO F.B. de; NETO, ALMIR O. Comparison of various atomic compositions of Au@Pd/C, Pd/C, and AuPd/C electrocatalysts for direct ethanol fuel cells. Energy Storage, v. 2, n. 3, p. 1-15, 2020. DOI: 10.1002/est2.139. Disponível em: http://repositorio.ipen.br/handle/123456789/31471. Acesso em: 14 Mar 2025.
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