Artigo de peri??dico
Glycerol dehydrogenation steps on Au/C surface in alkaline medium
Registro en:
0960-1481
167
10.1016/j.renene.2020.12.026
0000-0001-8745-3421
75.34
90.00
Autor
FONTES, E.H.
RAMOS, C.E.D.
OTTONI, C.A.
SOUZA, R.F.B. de
ANTOLINI, E.
NETO, A.O.
Resumen
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. Coordena????o de Aperfei??oamento de Pessoal de N??vel Superior (CAPES) Conselho Nacional de Desenvolvimento Cient??fico e Tecnol??gico (CNPq) Funda????o de Amparo ?? Pesquisa do Estado de S??o Paulo (FAPESP) CAPES: 88882.315566/2019 CNPq: 300816/2016-2 FAPESP: 14/09087-4; 14/50279-4; 17/11937-4