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Dry reforming of methane over nickel supported on Nd–ceria: enhancement of the catalytic properties and coke resistance

Nickel (5 wt%) supported on Nd-doped ceria was studied as catalysts in the DRM reaction at stoichiometric conditions in the range of 600–800 °C. Ce(1−x)Nd(x)O(2−δ) supports with different Nd contents (x = 0, 0.05, 0.1 and 0.2) were successfully synthesized. The role of oxygen vacancies by the incorp...

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Autores principales: Lara-García, Hugo A., Araiza, Daniel G., Méndez-Galván, Melissa, Tehuacanero-Cuapa, Samuel, Gómez-Cortés, Antonio, Díaz, Gabriela
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9056702/
https://www.ncbi.nlm.nih.gov/pubmed/35515038
http://dx.doi.org/10.1039/d0ra05761d
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author Lara-García, Hugo A.
Araiza, Daniel G.
Méndez-Galván, Melissa
Tehuacanero-Cuapa, Samuel
Gómez-Cortés, Antonio
Díaz, Gabriela
author_facet Lara-García, Hugo A.
Araiza, Daniel G.
Méndez-Galván, Melissa
Tehuacanero-Cuapa, Samuel
Gómez-Cortés, Antonio
Díaz, Gabriela
author_sort Lara-García, Hugo A.
collection PubMed
description Nickel (5 wt%) supported on Nd-doped ceria was studied as catalysts in the DRM reaction at stoichiometric conditions in the range of 600–800 °C. Ce(1−x)Nd(x)O(2−δ) supports with different Nd contents (x = 0, 0.05, 0.1 and 0.2) were successfully synthesized. The role of oxygen vacancies by the incorporation of Nd(3+) into the ceria lattice was investigated. These species were quantified by XRD and Raman spectroscopy, showing a linear dependence as a function of Nd content. Ni/Nd–ceria catalysts were prepared by wet impregnation. Although formation of oxygen vacancies, as well as microstructural features of the support (smaller crystallite sizes, higher surface area, and developed mesoporous structure) were improved as a function of the Nd content, no significant differences were observed in the catalytic properties of Ni/Nd–ceria in the DRM reaction. Despite this, compared to undoped ceria, all the Nd-doped CeO(2) catalysts present an enhanced activity and stability, and the best catalytic performance was observed in the Ni/Ce(0.95)Nd(0.05)O(2−δ) sample. Quantification of carbon residues in spent catalysts showed, as expected, lower amounts in the Ni/Nd–ceria samples; nevertheless, among them, the catalyst with the higher amount of oxygen vacancies, is the one with the higher carbon residues. Incorporation of Nd in ceria changes the acid/base properties, diminishing the gasification capacity of the carbonaceous species. These results emphasize that the activity and stability in the Ni/Nd–ceria catalysts for the DRM reaction depend on two key factors, the redox and the acid/base properties of the CeO(2) supports, offering insights about the necessary and adequate balance between these properties.
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spelling pubmed-90567022022-05-04 Dry reforming of methane over nickel supported on Nd–ceria: enhancement of the catalytic properties and coke resistance Lara-García, Hugo A. Araiza, Daniel G. Méndez-Galván, Melissa Tehuacanero-Cuapa, Samuel Gómez-Cortés, Antonio Díaz, Gabriela RSC Adv Chemistry Nickel (5 wt%) supported on Nd-doped ceria was studied as catalysts in the DRM reaction at stoichiometric conditions in the range of 600–800 °C. Ce(1−x)Nd(x)O(2−δ) supports with different Nd contents (x = 0, 0.05, 0.1 and 0.2) were successfully synthesized. The role of oxygen vacancies by the incorporation of Nd(3+) into the ceria lattice was investigated. These species were quantified by XRD and Raman spectroscopy, showing a linear dependence as a function of Nd content. Ni/Nd–ceria catalysts were prepared by wet impregnation. Although formation of oxygen vacancies, as well as microstructural features of the support (smaller crystallite sizes, higher surface area, and developed mesoporous structure) were improved as a function of the Nd content, no significant differences were observed in the catalytic properties of Ni/Nd–ceria in the DRM reaction. Despite this, compared to undoped ceria, all the Nd-doped CeO(2) catalysts present an enhanced activity and stability, and the best catalytic performance was observed in the Ni/Ce(0.95)Nd(0.05)O(2−δ) sample. Quantification of carbon residues in spent catalysts showed, as expected, lower amounts in the Ni/Nd–ceria samples; nevertheless, among them, the catalyst with the higher amount of oxygen vacancies, is the one with the higher carbon residues. Incorporation of Nd in ceria changes the acid/base properties, diminishing the gasification capacity of the carbonaceous species. These results emphasize that the activity and stability in the Ni/Nd–ceria catalysts for the DRM reaction depend on two key factors, the redox and the acid/base properties of the CeO(2) supports, offering insights about the necessary and adequate balance between these properties. The Royal Society of Chemistry 2020-09-07 /pmc/articles/PMC9056702/ /pubmed/35515038 http://dx.doi.org/10.1039/d0ra05761d Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Lara-García, Hugo A.
Araiza, Daniel G.
Méndez-Galván, Melissa
Tehuacanero-Cuapa, Samuel
Gómez-Cortés, Antonio
Díaz, Gabriela
Dry reforming of methane over nickel supported on Nd–ceria: enhancement of the catalytic properties and coke resistance
title Dry reforming of methane over nickel supported on Nd–ceria: enhancement of the catalytic properties and coke resistance
title_full Dry reforming of methane over nickel supported on Nd–ceria: enhancement of the catalytic properties and coke resistance
title_fullStr Dry reforming of methane over nickel supported on Nd–ceria: enhancement of the catalytic properties and coke resistance
title_full_unstemmed Dry reforming of methane over nickel supported on Nd–ceria: enhancement of the catalytic properties and coke resistance
title_short Dry reforming of methane over nickel supported on Nd–ceria: enhancement of the catalytic properties and coke resistance
title_sort dry reforming of methane over nickel supported on nd–ceria: enhancement of the catalytic properties and coke resistance
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9056702/
https://www.ncbi.nlm.nih.gov/pubmed/35515038
http://dx.doi.org/10.1039/d0ra05761d
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