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A relationship between the V(4+)/V(5+) ratio and the surface dispersion, surface acidity, and redox performance of V(2)O(5)–WO(3)/TiO(2) SCR catalysts

A series of V(2)O(5)–WO(3)/TiO(2) catalysts with different vanadium loading amounts were prepared by an impregnation method and were characterized by XRD, Raman spectroscopy, XPS, DRIFTS, Py-DRIFTS, NH(3)-TPD, H(2)-TPR, etc. The results show that the catalytic activity is related to the ratio of V(4...

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Detalles Bibliográficos
Autores principales: Zhao, Xuteng, Yan, Yongyi, Mao, Lei, Fu, Maochen, Zhao, Hairui, Sun, Lvsheng, Xiao, Youhong, Dong, Guojun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9085620/
https://www.ncbi.nlm.nih.gov/pubmed/35548748
http://dx.doi.org/10.1039/c8ra02857e
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author Zhao, Xuteng
Yan, Yongyi
Mao, Lei
Fu, Maochen
Zhao, Hairui
Sun, Lvsheng
Xiao, Youhong
Dong, Guojun
author_facet Zhao, Xuteng
Yan, Yongyi
Mao, Lei
Fu, Maochen
Zhao, Hairui
Sun, Lvsheng
Xiao, Youhong
Dong, Guojun
author_sort Zhao, Xuteng
collection PubMed
description A series of V(2)O(5)–WO(3)/TiO(2) catalysts with different vanadium loading amounts were prepared by an impregnation method and were characterized by XRD, Raman spectroscopy, XPS, DRIFTS, Py-DRIFTS, NH(3)-TPD, H(2)-TPR, etc. The results show that the catalytic activity is related to the ratio of V(4+)/V(5+). The variation of the V(4+)/V(5+) ratio caused by the different dispersion states of vanadia oxide leads to changes in the surface acidity and redox properties of the catalysts. As the V(4+)/V(5+) ratio reaches the maximum value, the apparent activation energy (E(a)) required to form the transition state on the Brønsted acid sites is the lowest. Artificial regulation of vanadium loading to properly increase V(4+)/V(5+) content may affect the interactions between V, W, O and Ti atoms, which enhances NH(3)-SCR reaction performance.
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spelling pubmed-90856202022-05-10 A relationship between the V(4+)/V(5+) ratio and the surface dispersion, surface acidity, and redox performance of V(2)O(5)–WO(3)/TiO(2) SCR catalysts Zhao, Xuteng Yan, Yongyi Mao, Lei Fu, Maochen Zhao, Hairui Sun, Lvsheng Xiao, Youhong Dong, Guojun RSC Adv Chemistry A series of V(2)O(5)–WO(3)/TiO(2) catalysts with different vanadium loading amounts were prepared by an impregnation method and were characterized by XRD, Raman spectroscopy, XPS, DRIFTS, Py-DRIFTS, NH(3)-TPD, H(2)-TPR, etc. The results show that the catalytic activity is related to the ratio of V(4+)/V(5+). The variation of the V(4+)/V(5+) ratio caused by the different dispersion states of vanadia oxide leads to changes in the surface acidity and redox properties of the catalysts. As the V(4+)/V(5+) ratio reaches the maximum value, the apparent activation energy (E(a)) required to form the transition state on the Brønsted acid sites is the lowest. Artificial regulation of vanadium loading to properly increase V(4+)/V(5+) content may affect the interactions between V, W, O and Ti atoms, which enhances NH(3)-SCR reaction performance. The Royal Society of Chemistry 2018-09-04 /pmc/articles/PMC9085620/ /pubmed/35548748 http://dx.doi.org/10.1039/c8ra02857e Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Zhao, Xuteng
Yan, Yongyi
Mao, Lei
Fu, Maochen
Zhao, Hairui
Sun, Lvsheng
Xiao, Youhong
Dong, Guojun
A relationship between the V(4+)/V(5+) ratio and the surface dispersion, surface acidity, and redox performance of V(2)O(5)–WO(3)/TiO(2) SCR catalysts
title A relationship between the V(4+)/V(5+) ratio and the surface dispersion, surface acidity, and redox performance of V(2)O(5)–WO(3)/TiO(2) SCR catalysts
title_full A relationship between the V(4+)/V(5+) ratio and the surface dispersion, surface acidity, and redox performance of V(2)O(5)–WO(3)/TiO(2) SCR catalysts
title_fullStr A relationship between the V(4+)/V(5+) ratio and the surface dispersion, surface acidity, and redox performance of V(2)O(5)–WO(3)/TiO(2) SCR catalysts
title_full_unstemmed A relationship between the V(4+)/V(5+) ratio and the surface dispersion, surface acidity, and redox performance of V(2)O(5)–WO(3)/TiO(2) SCR catalysts
title_short A relationship between the V(4+)/V(5+) ratio and the surface dispersion, surface acidity, and redox performance of V(2)O(5)–WO(3)/TiO(2) SCR catalysts
title_sort relationship between the v(4+)/v(5+) ratio and the surface dispersion, surface acidity, and redox performance of v(2)o(5)–wo(3)/tio(2) scr catalysts
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9085620/
https://www.ncbi.nlm.nih.gov/pubmed/35548748
http://dx.doi.org/10.1039/c8ra02857e
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