PtAu electrocatalyst for glycerol oxidation reaction using a ATR-FTIR/Single direct alkaline glycerol/Air cell in situ study
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Electrocatalysis
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Different ratios of PtAu/C electrocatalysts were
synthesized and assessed for their capability by glycerol
electrooxidation. Electrocatalysts were characterized by Xray diffraction (XRD), transmission electron microscopy
(TEM), cyclic voltammetry (CV), chronoamperometry, and
direct glycerol/air fuel cell coupled with a ATR-FTIR setup.
XRD of PtAu/C electrocatalysts showed the presence of Pt
(fcc), Au (fcc), and PtAu (fcc) phases, and TEM images for
PtAu/C electrocatalysts showed particle size between 5.4
and 5.8 nm. PtAu/C (50:50) presented the best result for
glycerol electrooxidation by cyclic voltammetry and
chronoamperommetry measurements in comparison with
other electrocatalysts prepared. All PtAu/C showed better
performance in comparison with Pt/C and Au/C. Moreover,
the addition of gold to platinum favored glycerol by electronic effect and bifunctional mechanism. Through ATRFTIR/direct alkaline glycerol/air cell in-situ study, it was
possible to identify glycerate and tartronate as main products
formed during the electrochemical glycerol oxidation.
Como referenciar
OTTONI, CRISTIANE A.; SILVA, SIRLANE G. da; SOUZA, RODRIGO F.B. de; OLIVEIRA NETO, ALMIR. PtAu electrocatalyst for glycerol oxidation reaction using a ATR-FTIR/Single direct alkaline glycerol/Air cell in situ study. Electrocatalysis, v. 7, p. 22-32, 2016. DOI: 10.1007/s12678-015-0277-7. Disponível em: http://repositorio.ipen.br/handle/123456789/25810. Acesso em: 30 Dec 2025.
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