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Article

Effect of Metal Content on Ethanol Decomposition over Ni-Co Catalysts Supported on La-Ce Oxides

1
Grupo de Catálisis (GC-UPTC), Universidad Pedagógica y Tecnológica de Colombia UPTC, Avenida Central del Norte, Vía Paipa, Tunja 150001, Colombia
2
Grupo de Investigación en Gestión Administrativa y Empresarial Sostenible (GIGAS), Universidad Pedagógica y Tecnológica de Colombia UPTC, Avenida Central del Norte, Vía Paipa, Tunja 150001, Colombia
3
Laboratório de Reatores, Cinética e Catalise (RECAT), Departamento de Engenharia Química e de Petróleo, Universidade Federal Fluminense, Niterói 24210-240, Brazil
4
Graduate Program in Science and Technology for Amazon Resources (PPGCTRA)-Institute of Exact Sciences and Technology (ICET/UFAM), ItcRua: Nossa Senhora do Rosario, 3863, Tiradentes, Itacoatiara-Amazonas 69103-208, Brazil
5
Grupo de Investigación en Fotocatálisis y Estado Sólido (GIFES), Escuela de Química, Universidad Tecnológica de Pereira, 660003 Pereira, Colombia
6
Laboratory of Thermal and Catalytic Processes (LPTC), Department of Chemical Engineering, University of Bío-Bío, Concepción 4081112, Chile
*
Author to whom correspondence should be addressed.
Materials 2020, 13(3), 759; https://doi.org/10.3390/ma13030759
Received: 16 December 2019 / Revised: 23 January 2020 / Accepted: 3 February 2020 / Published: 7 February 2020
(This article belongs to the Special Issue Catalysts: Preparation, Catalytic Performance and Catalytic Reaction)
The search for catalysts with features that can improve coke resistance and decrease byproduct formation is a current goal in H2 production from renewable sources. In this work, the effect of the presence of Ni nanoparticles over Co/La-Ce oxides on the ethanol decomposition reaction was studied. Catalysts were synthetized using as precursor a La0.8Ce0.2NixCo1-xO3 perovskite-type material to ensure a low segregation of phases and a high dispersion of metals. After reduction at 873 K, the perovskite structure was destroyed, and metal Co-Ni particles were supported over a lanthanum-cerium oxide. The materials were characterized by different techniques before and after reaction. Solids exhibited metal particle sizes between 5 and 15 nm demonstrating the advantages of the preparation method to obtain Ni-Co alloys. Although the results of adsorption of ethanol followed by diffuse reflectance infrared fourier transformed spectroscopy (DRIFTS) showed acetate species strongly adsorbed on the catalyst’s surface, the material (Ni0.7Co0.3/La0.8Ce0.2) with the lowest particle size was the most stable system leading to the lowest amount of carbon deposits during ethanol decomposition. This catalyst showed the better performance, with a higher ethanol conversion (98.4%) and hydrogen selectivity (75%). All catalysts exhibited carbonaceous deposits, which were an ordered and disordered carbon phase mixture. View Full-Text
Keywords: bimetallic catalysts; Ni-Co; ethanol decomposition; perovskite precursor; supports of La-Ce oxides bimetallic catalysts; Ni-Co; ethanol decomposition; perovskite precursor; supports of La-Ce oxides
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MDPI and ACS Style

Vergara, H.R.; Brijaldo, M.H.; Martinez, J.J.; Rojas, H.A.; Pedraza, J.; Passos, F.B.; Pereira da Costa, L.; Gonzalez-Vera, D.; Osorio-Vargas, P. Effect of Metal Content on Ethanol Decomposition over Ni-Co Catalysts Supported on La-Ce Oxides. Materials 2020, 13, 759. https://doi.org/10.3390/ma13030759

AMA Style

Vergara HR, Brijaldo MH, Martinez JJ, Rojas HA, Pedraza J, Passos FB, Pereira da Costa L, Gonzalez-Vera D, Osorio-Vargas P. Effect of Metal Content on Ethanol Decomposition over Ni-Co Catalysts Supported on La-Ce Oxides. Materials. 2020; 13(3):759. https://doi.org/10.3390/ma13030759

Chicago/Turabian Style

Vergara, Harold R., Maria H. Brijaldo, José J. Martinez, Hugo A. Rojas, José Pedraza, Fabio B. Passos, Luiz Pereira da Costa, Daniela Gonzalez-Vera, and Paula Osorio-Vargas. 2020. "Effect of Metal Content on Ethanol Decomposition over Ni-Co Catalysts Supported on La-Ce Oxides" Materials 13, no. 3: 759. https://doi.org/10.3390/ma13030759

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