Titre:	Electrochemistry for biofuels waste valorization: vinasse as a reducing agent for Pt/C and its application to the electrolysis of glycerin and vinasse
Auteur(s):	Crisafulli, Rudy Amorim, Fernando M. de Lino Marcionilio, Suzana Maria Loures de Oliveira Cunha, William Mendes Araújo, Brenda Roberta Silveira de Dias, José Alves Linares León, José Joaquín
Assunto::	Valorização de resíduos Vinhaça Glicerina Eletroquímica Hidrogênio Catalisadores
Date de publication:	mai-2019
Editeur:	Elsevier
Référence bibliographique:	CRISAFULLI, Rudy et al. Electrochemistry for biofuels waste valorization: vinasse as a reducing agent for Pt/C and its application to the electrolysis of glycerin and vinasse. Electrochemistry Communications, v. 102, maio 2019. p. 25-30. DOI: https://doi.org/10.1016/j.elecom.2019.03.012. Disponível em: https://www.sciencedirect.com/science/article/pii/S1388248119300761?via%3Dihub. Acesso em: 22 abr. 2020.
Abstract:	Waste vinasse has been used, for the first time, as a reducing agent to prepare a 20 wt% Pt/C electrocatalyst. After alkalization and subsequent filtration, abundant cations such as Ca, Mg and Fe were effectively removed, precipitating as hydroxides and insoluble phosphates. Pt chemical reduction was carried out under reflux in the presence of Vulcan XC-72R carbon by the action of reductive species such as sugars and phenols present. Reduction was confirmed by thermal analysis and X-ray diffractograms displaying the typical Pt fcc structure formed by nanocrystals. In the transmission images, an irregular dispersion of the Pt nanoparticles was observed on the carbon support, with the presence of large agglomerations with a cotton-like structure. This structure was found to be very active for glycerol electrolysis in an alkaline membrane electrolysis cell, comparable to commercial materials. Finally, results for electrolysis of the vinasse were also presented, demonstrating the possibility of valorizing this residue by the production of hydrogen.
metadata.dc.description.unidade:	Instituto de Química (IQ)
Licença::	© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/).
DOI:	https://doi.org/10.1016/j.elecom.2019.03.012
Collection(s) :	Artigos publicados em periódicos e afins

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