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Relationship between the molecular structure of V 2 O 5 /TiO 2 catalysts and the reactivity of SO 2 oxidation

The relationship between the molecular structure of V 2 O 5 /TiO 2 catalysts and the reactivity of SO 2 oxidation was investigated. The dispersion state and surface properties of supported vanadia over V 2 O 5 /TiO 2 catalysts were studied with various experimental techniques. Isolated vanadia speci... Full description

Journal Title: Catalysis Science & Technology 2016, Vol.6(4), pp.1187-1194
Main Author: Ji, Peidong
Other Authors: Gao, Xiang , Du, Xuesen , Zheng, Chenghang , Luo, Zhongyang , Cen, Kefa
Format: Electronic Article Electronic Article
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ID: ISSN: 2044-4753 ; E-ISSN: 2044-4761 ; DOI: 10.1039/c5cy00867k
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title: Relationship between the molecular structure of V 2 O 5 /TiO 2 catalysts and the reactivity of SO 2 oxidation
format: Article
creator:
  • Ji, Peidong
  • Gao, Xiang
  • Du, Xuesen
  • Zheng, Chenghang
  • Luo, Zhongyang
  • Cen, Kefa
subjects:
  • Vanadium Pentoxide
  • Molecular Structure
  • Dispersions
  • Titanium Dioxide
  • Oxidation
  • Constants
  • Catalysts
  • Catalysis
  • Chemical and Electrochemical Properties (MD)
  • Chemical and Electrochemical Properties (Ep)
  • Chemical and Electrochemical Properties (Ed)
  • Chemical and Electrochemical Properties (EC)
ispartof: Catalysis Science & Technology, 2016, Vol.6(4), pp.1187-1194
description: The relationship between the molecular structure of V 2 O 5 /TiO 2 catalysts and the reactivity of SO 2 oxidation was investigated. The dispersion state and surface properties of supported vanadia over V 2 O 5 /TiO 2 catalysts were studied with various experimental techniques. Isolated vanadia species were dispersed on the TiO 2 surface as TiOV bonds at VO x coverage far below the monolayer. Polymeric vanadia species were then formed through the VOV bonds as the VO x coverage increased. SO 2 temperature-programmed desorption and in situ diffuse reflectance infrared Fourier transform spectroscopy were conducted to study the interaction between SO 2 and V 2 O 5 /TiO 2 . On the V 2 O 5 /TiO 2 catalysts, the turnover frequency of SO 2 oxidation was almost constant with increased VO x coverage under the condition of constant temperature. VO was demonstrated to play a critical role in the SO 2 adsorption and oxidation. A possible reaction mechanism was established in this study.
language:
source:
identifier: ISSN: 2044-4753 ; E-ISSN: 2044-4761 ; DOI: 10.1039/c5cy00867k
fulltext: fulltext
issn:
  • 2044-4753
  • 2044-4761
  • 20444761
  • 20444753
url: Link


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titleRelationship between the molecular structure of V 2 O 5 /TiO 2 catalysts and the reactivity of SO 2 oxidation
creatorJi, Peidong ; Gao, Xiang ; Du, Xuesen ; Zheng, Chenghang ; Luo, Zhongyang ; Cen, Kefa
ispartofCatalysis Science & Technology, 2016, Vol.6(4), pp.1187-1194
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descriptionThe relationship between the molecular structure of V 2 O 5 /TiO 2 catalysts and the reactivity of SO 2 oxidation was investigated. The dispersion state and surface properties of supported vanadia over V 2 O 5 /TiO 2 catalysts were studied with various experimental techniques. Isolated vanadia species were dispersed on the TiO 2 surface as TiOV bonds at VO x coverage far below the monolayer. Polymeric vanadia species were then formed through the VOV bonds as the VO x coverage increased. SO 2 temperature-programmed desorption and in situ diffuse reflectance infrared Fourier transform spectroscopy were conducted to study the interaction between SO 2 and V 2 O 5 /TiO 2 . On the V 2 O 5 /TiO 2 catalysts, the turnover frequency of SO 2 oxidation was almost constant with increased VO x coverage under the condition of constant temperature. VO was demonstrated to play a critical role in the SO 2 adsorption and oxidation. A possible reaction mechanism was established in this study.
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subjectVanadium Pentoxide ; Molecular Structure ; Dispersions ; Titanium Dioxide ; Oxidation ; Constants ; Catalysts ; Catalysis ; Chemical and Electrochemical Properties (MD) ; Chemical and Electrochemical Properties (Ep) ; Chemical and Electrochemical Properties (Ed) ; Chemical and Electrochemical Properties (EC);
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titleRelationship between the molecular structure of V 2 O 5 /TiO 2 catalysts and the reactivity of SO 2 oxidation
descriptionThe relationship between the molecular structure of V 2 O 5 /TiO 2 catalysts and the reactivity of SO 2 oxidation was investigated. The dispersion state and surface properties of supported vanadia over V 2 O 5 /TiO 2 catalysts were studied with various experimental techniques. Isolated vanadia species were dispersed on the TiO 2 surface as TiOV bonds at VO x coverage far below the monolayer. Polymeric vanadia species were then formed through the VOV bonds as the VO x coverage increased. SO 2 temperature-programmed desorption and in situ diffuse reflectance infrared Fourier transform spectroscopy were conducted to study the interaction between SO 2 and V 2 O 5 /TiO 2 . On the V 2 O 5 /TiO 2 catalysts, the turnover frequency of SO 2 oxidation was almost constant with increased VO x coverage under the condition of constant temperature. VO was demonstrated to play a critical role in the SO 2 adsorption and oxidation. A possible reaction mechanism was established in this study.
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titleRelationship between the molecular structure of V 2 O 5 /TiO 2 catalysts and the reactivity of SO 2 oxidation
authorJi, Peidong ; Gao, Xiang ; Du, Xuesen ; Zheng, Chenghang ; Luo, Zhongyang ; Cen, Kefa
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abstractThe relationship between the molecular structure of V 2 O 5 /TiO 2 catalysts and the reactivity of SO 2 oxidation was investigated. The dispersion state and surface properties of supported vanadia over V 2 O 5 /TiO 2 catalysts were studied with various experimental techniques. Isolated vanadia species were dispersed on the TiO 2 surface as TiOV bonds at VO x coverage far below the monolayer. Polymeric vanadia species were then formed through the VOV bonds as the VO x coverage increased. SO 2 temperature-programmed desorption and in situ diffuse reflectance infrared Fourier transform spectroscopy were conducted to study the interaction between SO 2 and V 2 O 5 /TiO 2 . On the V 2 O 5 /TiO 2 catalysts, the turnover frequency of SO 2 oxidation was almost constant with increased VO x coverage under the condition of constant temperature. VO was demonstrated to play a critical role in the SO 2 adsorption and oxidation. A possible reaction mechanism was established in this study.
doi10.1039/c5cy00867k
pages1187-1194