Título:	Nanoparticulated WO3/NiWO4 using cellulose as a template and Its application as an auxiliary co-catalyst to Pt for ethanol and glycerol electro-oxidation
Autor(es):	Guimarães, Munique Gonçalves Macedo, Julio Lemos de Linares León, José Joaquín Ghesti, Grace Ferreira
ORCID:	https://orcid.org/0000-0002-5761-4754 https://orcid.org/0000-0001-9109-6180 https://orcid.org/0000-0003-1043-5748
Afiliação do autor:	University of Brasilia, Institute of Chemistry, Laboratory of Bioprocesses Brewing Technology and Catalysis in Renewable Energy University of Brasilia, Institute of Chemistry, Laboratory of Bioprocesses Brewing Technology and Catalysis in Renewable Energy University of Brasilia, Institute of Chemistry, Laboratory of Chemical Processes Development University of Brasilia, Institute of Chemistry, Laboratory of Bioprocesses Brewing Technology and Catalysis in Renewable Energy
Assunto:	Celulose nanocristalina Celulose microcristalina Óxido de níquel Trióxido de tungstênio Eletrocatálise Etanol Glicerol
Data de publicação:	2024
Editora:	MDPI
Referência:	GUIMARÃES, Munique G. et al. Nanoparticulated WO3/NiWO4 using cellulose as a template and Its application as an auxiliary co-catalyst to Pt for ethanol and glycerol electro-oxidation. International Journal of Molecular Sciences, [S. l.], v. 25, n. 2, 685, 2024. DOI: https://doi.org/10.3390/ijms25020685. Disponível em: https://www.mdpi.com/1422-0067/25/2/685. Acesso em: 12 nov. 2026.
Abstract:	This work reports the use of cellulose as a template to prepare nanosized WO3 or NiWO4 and its application as a co-catalyst in the electro-oxidation of ethanol and glycerol. Microcrystalline cellulose was hydrolyzed with phosphotungstic acid (H3PW12O40) to prepare the nanocrystalline cellulose template. The latter was air-calcinated to remove the template and obtain nanometric WO3. Tungsten oxide was impregnated with Ni(NO3)2, which was subsequently air-calcinated to obtain the nanometric NiWO4. Elemental analysis confirmed the coexistence of nickel and tungsten, whereas thermal analysis evidenced a high thermal stability for these materials. The X-ray diffractograms displayed crystal facets of WO3 and, when Ni(II) was added, NiWO4. The transmission electron micrographs corroborated the formation of nanosized particles with average particle sizes in the range of 30 to 50 nm. Finally, to apply this material, Pt/WO3-C and Pt/WO3-NiWO4-C were prepared and used in ethanol and glycerol electro-oxidation in an alkaline medium, observing a promotional effect of the oxide and tungstate by reducing the onset potential and increasing the current density. These materials show great potential to produce clean electricity or green hydrogen, contributing to energetic transition.
Unidade Acadêmica:	Instituto de Química (IQ)
Programa de pós-graduação:	Programa de Pós-Graduação em Tecnologias Química e Biológica
Licença:	This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
DOI:	https://doi.org/10.3390/ijms25020685
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