CeO2 nanoclusters stabilized in aerogel matrix as catalysts for Cl2 production from HCl oxidation

Xihua Xu; Zhaoyang Fei; Xian Chen; Jihai Tang; Mifen Cui; Xu Qiao

doi:10.11949/j.issn.0438-1157.20150902

CeO₂ nanoclusters stabilized in aerogel matrix as catalysts for Cl₂ production from HCl oxidation

Xihua Xu, Zhaoyang Fei, Xian Chen, Jihai Tang, Mifen Cui, Xu Qiao

化工学院

Nanjing Tech University

科研成果: 期刊稿件 › 文章 › 同行评审

3 引用（Scopus）

摘要

CeO₂ nanoclusters inserted into aerogel matrix (CeO₂@M_xO_y, M_xO_y= SiO₂, ZrO₂, Al₂O₃) prepared by a single-step sol-gel method were used as catalysts for recycling Cl₂ from HCl oxidation. Due to their remarkable quantum-size effects, the properties of CeO₂ nanoclusters were significantly different from crystal phase CeO₂. The CeO₂ nanoclusters could be completely reduced at the temperature range for reduction of the surface oxygen species of crystal phase CeO₂. The unique properties of CeO₂ nanoclusters resulted in the high activity of CeO₂@M_xO_y in the process of HCl oxidation reaction. 40CeO₂@SiO₂ exhibited the highest activity and the STY (space time yield of Cl₂) reached to 2.10 g·(g cat)^-1·h^-1 at 430℃ with V_O2/V_HCl of 1 and contact time of 0.1598 h. Kinetic studies showed that both O₂ and HCl competed for the active sites rendering desorption of surface Cl as the rate-determining step.

源语言	英语
页（从-至）	3421-3427
页数	7
期刊	Huagong Xuebao/CIESC Journal
卷	66
期	9
DOI	https://doi.org/10.11949/j.issn.0438-1157.20150902
出版状态	已出版 - 1 9月 2015

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10.11949/j.issn.0438-1157.20150902

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@article{0d0028e101704f1fba5426ecc6e43e76,

title = "CeO2 nanoclusters stabilized in aerogel matrix as catalysts for Cl2 production from HCl oxidation",

abstract = "CeO2 nanoclusters inserted into aerogel matrix (CeO2@MxOy, MxOy= SiO2, ZrO2, Al2O3) prepared by a single-step sol-gel method were used as catalysts for recycling Cl2 from HCl oxidation. Due to their remarkable quantum-size effects, the properties of CeO2 nanoclusters were significantly different from crystal phase CeO2. The CeO2 nanoclusters could be completely reduced at the temperature range for reduction of the surface oxygen species of crystal phase CeO2. The unique properties of CeO2 nanoclusters resulted in the high activity of CeO2@MxOy in the process of HCl oxidation reaction. 40CeO2@SiO2 exhibited the highest activity and the STY (space time yield of Cl2) reached to 2.10 g·(g cat)-1·h-1 at 430℃ with VO2/VHCl of 1 and contact time of 0.1598 h. Kinetic studies showed that both O2 and HCl competed for the active sites rendering desorption of surface Cl as the rate-determining step.",

keywords = "Aerogel, Catalytic oxidation, CeO, Chlorine recycle, Kinetics, Nanoclusters",

author = "Xihua Xu and Zhaoyang Fei and Xian Chen and Jihai Tang and Mifen Cui and Xu Qiao",

year = "2015",

month = sep,

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doi = "10.11949/j.issn.0438-1157.20150902",

language = "英语",

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TY - JOUR

T1 - CeO2 nanoclusters stabilized in aerogel matrix as catalysts for Cl2 production from HCl oxidation

AU - Xu, Xihua

AU - Fei, Zhaoyang

AU - Chen, Xian

AU - Tang, Jihai

AU - Cui, Mifen

AU - Qiao, Xu

PY - 2015/9/1

Y1 - 2015/9/1

N2 - CeO2 nanoclusters inserted into aerogel matrix (CeO2@MxOy, MxOy= SiO2, ZrO2, Al2O3) prepared by a single-step sol-gel method were used as catalysts for recycling Cl2 from HCl oxidation. Due to their remarkable quantum-size effects, the properties of CeO2 nanoclusters were significantly different from crystal phase CeO2. The CeO2 nanoclusters could be completely reduced at the temperature range for reduction of the surface oxygen species of crystal phase CeO2. The unique properties of CeO2 nanoclusters resulted in the high activity of CeO2@MxOy in the process of HCl oxidation reaction. 40CeO2@SiO2 exhibited the highest activity and the STY (space time yield of Cl2) reached to 2.10 g·(g cat)-1·h-1 at 430℃ with VO2/VHCl of 1 and contact time of 0.1598 h. Kinetic studies showed that both O2 and HCl competed for the active sites rendering desorption of surface Cl as the rate-determining step.

AB - CeO2 nanoclusters inserted into aerogel matrix (CeO2@MxOy, MxOy= SiO2, ZrO2, Al2O3) prepared by a single-step sol-gel method were used as catalysts for recycling Cl2 from HCl oxidation. Due to their remarkable quantum-size effects, the properties of CeO2 nanoclusters were significantly different from crystal phase CeO2. The CeO2 nanoclusters could be completely reduced at the temperature range for reduction of the surface oxygen species of crystal phase CeO2. The unique properties of CeO2 nanoclusters resulted in the high activity of CeO2@MxOy in the process of HCl oxidation reaction. 40CeO2@SiO2 exhibited the highest activity and the STY (space time yield of Cl2) reached to 2.10 g·(g cat)-1·h-1 at 430℃ with VO2/VHCl of 1 and contact time of 0.1598 h. Kinetic studies showed that both O2 and HCl competed for the active sites rendering desorption of surface Cl as the rate-determining step.

KW - Aerogel

KW - Catalytic oxidation

KW - CeO

KW - Chlorine recycle

KW - Kinetics

KW - Nanoclusters

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U2 - 10.11949/j.issn.0438-1157.20150902

DO - 10.11949/j.issn.0438-1157.20150902

M3 - 文章

AN - SCOPUS:85050576937

SN - 0438-1157

VL - 66

SP - 3421

EP - 3427

JO - Huagong Xuebao/CIESC Journal

JF - Huagong Xuebao/CIESC Journal

IS - 9

ER -

CeO2 nanoclusters stabilized in aerogel matrix as catalysts for Cl2 production from HCl oxidation

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CeO₂ nanoclusters stabilized in aerogel matrix as catalysts for Cl₂ production from HCl oxidation