Glycerol dehydrogenation steps on Au/C surface in alkaline medium
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2021
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Renewable Energy
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The glycerol oxidation reaction (GLYOR) was evaluated using an Au/C electrocatalyst under alkaline
conditions and varying glycerol (GLY) concentration. This electrocatalyst was synthesized by the borohydride
reduction method. Au/C was characterized by X-ray diffraction (XRD), transmission electron
microscopy (TEM), and electrochemical techniques associated with in situ attenuated total reflectance
Fourier transformed infrared spectroscopy (ATR-FTIR). XRD diffractograms showed the presence of Au
(fcc). Cyclic voltammetry assisted by ATR-FTIR in situ measurements revealed that GLY oxidation on gold
leads to the formation of a high amount of glyceraldehyde (GLYAD) for low GLY concentrations, while a
lower amount of GLYAD was observed and the formation of dihydroxyacetone (DHA) was prevalent for
high GLY concentrations. For high GLY concentrations DHA is almost stable, whereas for low GLY concentration
DHA is fast oxidized to hydroxypyruvate. The excellent GLYOR activity of the Au/C catalyst in
low GLY concentrations leads to the formation of deeper oxidized C1 species.
Como referenciar
FONTES, E.H.; RAMOS, C.E.D.; OTTONI, C.A.; SOUZA, R.F.B. de; ANTOLINI, E.; NETO, A.O. Glycerol dehydrogenation steps on Au/C surface in alkaline medium: an in-situ ATR-FTIR approach. Renewable Energy, v. 167, p. 954-959, 2021. DOI: 10.1016/j.renene.2020.12.026. Disponível em: http://repositorio.ipen.br/handle/123456789/31970. Acesso em: 19 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.