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Improving the Performance of BaMnO(3) Perovskite as Soot Oxidation Catalyst Using Carbon Black during Sol-Gel Synthesis

A series of BaMnO(3) solids (BM-CX) were prepared by a modified sol-gel method in which a carbon black (VULCAN XC-72R), and different calcination temperatures (600–850 °C) were used. The fresh and used catalysts were characterized by ICP-OES, XRD, XPS, FESEM, TEM, O(2-)TPD and H(2-) TPR-. The charac...

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Autores principales: Torregrosa-Rivero, Verónica, Sánchez-Adsuar, María-Salvadora, Illán-Gómez, María-José
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8781672/
https://www.ncbi.nlm.nih.gov/pubmed/35055237
http://dx.doi.org/10.3390/nano12020219
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author Torregrosa-Rivero, Verónica
Sánchez-Adsuar, María-Salvadora
Illán-Gómez, María-José
author_facet Torregrosa-Rivero, Verónica
Sánchez-Adsuar, María-Salvadora
Illán-Gómez, María-José
author_sort Torregrosa-Rivero, Verónica
collection PubMed
description A series of BaMnO(3) solids (BM-CX) were prepared by a modified sol-gel method in which a carbon black (VULCAN XC-72R), and different calcination temperatures (600–850 °C) were used. The fresh and used catalysts were characterized by ICP-OES, XRD, XPS, FESEM, TEM, O(2-)TPD and H(2-) TPR-. The characterization results indicate that the use of low calcination temperatures in the presence of carbon black allows decreasing the sintering effects and achieving some improvements regarding BM reference catalyst: (i) smaller average crystal and particles size, (ii) a slight increase in the BET surface area, (iii) a decrease in the macropores diameter range and, (iv) a lower temperature for the reduction of manganese. The hydrogen consumption confirms Mn(III) and Mn(IV) are presented in the samples, Mn(III) being the main oxidation state. The BM-CX catalysts series shows an improved catalytic performance regarding BM reference catalyst for oxidation processes (NO to NO(2) and NO(2)-assisted soot oxidation), promoting higher stability and higher CO(2) selectivity. BM-C700 shows the best catalytic performance, i.e., the highest thermal stability and a high initial soot oxidation rate, which decreases the accumulation of soot during the soot oxidation and, consequently, minimizes the catalyst deactivation.
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spelling pubmed-87816722022-01-22 Improving the Performance of BaMnO(3) Perovskite as Soot Oxidation Catalyst Using Carbon Black during Sol-Gel Synthesis Torregrosa-Rivero, Verónica Sánchez-Adsuar, María-Salvadora Illán-Gómez, María-José Nanomaterials (Basel) Article A series of BaMnO(3) solids (BM-CX) were prepared by a modified sol-gel method in which a carbon black (VULCAN XC-72R), and different calcination temperatures (600–850 °C) were used. The fresh and used catalysts were characterized by ICP-OES, XRD, XPS, FESEM, TEM, O(2-)TPD and H(2-) TPR-. The characterization results indicate that the use of low calcination temperatures in the presence of carbon black allows decreasing the sintering effects and achieving some improvements regarding BM reference catalyst: (i) smaller average crystal and particles size, (ii) a slight increase in the BET surface area, (iii) a decrease in the macropores diameter range and, (iv) a lower temperature for the reduction of manganese. The hydrogen consumption confirms Mn(III) and Mn(IV) are presented in the samples, Mn(III) being the main oxidation state. The BM-CX catalysts series shows an improved catalytic performance regarding BM reference catalyst for oxidation processes (NO to NO(2) and NO(2)-assisted soot oxidation), promoting higher stability and higher CO(2) selectivity. BM-C700 shows the best catalytic performance, i.e., the highest thermal stability and a high initial soot oxidation rate, which decreases the accumulation of soot during the soot oxidation and, consequently, minimizes the catalyst deactivation. MDPI 2022-01-10 /pmc/articles/PMC8781672/ /pubmed/35055237 http://dx.doi.org/10.3390/nano12020219 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. 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/).
spellingShingle Article
Torregrosa-Rivero, Verónica
Sánchez-Adsuar, María-Salvadora
Illán-Gómez, María-José
Improving the Performance of BaMnO(3) Perovskite as Soot Oxidation Catalyst Using Carbon Black during Sol-Gel Synthesis
title Improving the Performance of BaMnO(3) Perovskite as Soot Oxidation Catalyst Using Carbon Black during Sol-Gel Synthesis
title_full Improving the Performance of BaMnO(3) Perovskite as Soot Oxidation Catalyst Using Carbon Black during Sol-Gel Synthesis
title_fullStr Improving the Performance of BaMnO(3) Perovskite as Soot Oxidation Catalyst Using Carbon Black during Sol-Gel Synthesis
title_full_unstemmed Improving the Performance of BaMnO(3) Perovskite as Soot Oxidation Catalyst Using Carbon Black during Sol-Gel Synthesis
title_short Improving the Performance of BaMnO(3) Perovskite as Soot Oxidation Catalyst Using Carbon Black during Sol-Gel Synthesis
title_sort improving the performance of bamno(3) perovskite as soot oxidation catalyst using carbon black during sol-gel synthesis
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8781672/
https://www.ncbi.nlm.nih.gov/pubmed/35055237
http://dx.doi.org/10.3390/nano12020219
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