1. Glycerol dehydrogenation steps on Au/C surface in alkaline medium: An in-situ ATR-FTIR approach
- Author
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Carlos Eduardo Domingues Ramos, E.H. Fontes, Cristiane Angélica Ottoni, Ermete Antolini, R. F. B. de Souza, Almir Oliveira Neto, IPEN/CNEN-SP, Universidade Estadual Paulista (Unesp), and Scuola di Scienza dei Materiali
- Subjects
animal structures ,integumentary system ,060102 archaeology ,Renewable Energy, Sustainability and the Environment ,Integral equation formalism for polarizable continuum model ,020209 energy ,Dihydroxyacetone ,Infrared spectroscopy ,Glycerol oxidation reaction ,06 humanities and the arts ,02 engineering and technology ,Borohydride ,Electrocatalyst ,Glyceraldehyde ,chemistry.chemical_compound ,chemistry ,Attenuated total reflection ,embryonic structures ,0202 electrical engineering, electronic engineering, information engineering ,0601 history and archaeology ,Cyclic voltammetry ,Fourier transform infrared spectroscopy ,Nuclear chemistry - Abstract
Made available in DSpace on 2021-06-25T10:17:59Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-04-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) 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. Instituto de Pesquisas Energéticas e Nucleares IPEN/CNEN-SP, Av. Prof. Lineu Prestes, 2242 Cidade Universitária Biosciences Institute São Paulo State University - UNESP Coastal Campus Scuola di Scienza dei Materiali, Via 25 aprile 22, Cogoleto Biosciences Institute São Paulo State University - UNESP Coastal Campus FAPESP: 2014/09087-4 FAPESP: 2014/50279-4 FAPESP: 2017/11937-4 CNPq: 300816/2016-2 CAPES: 88882.315566/2019
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- 2021