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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...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2018
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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. |
format | Online Article Text |
id | pubmed-9085620 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
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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