A Co3O4-CeO2 functionalized SBA-15 monolith with a three-dimensional framework improves NOx-assisted soot combustion

Qiongqiong Yang; Fangna Gu; Yufang Tang; Hui Zhang; Qing Liu; Ziyi Zhong; Fabing Su

doi:10.1039/c4ra16832a

A Co₃O₄-CeO₂ functionalized SBA-15 monolith with a three-dimensional framework improves NO_x-assisted soot combustion

Qiongqiong Yang, Fangna Gu^*, Yufang Tang, Hui Zhang, Qing Liu, Ziyi Zhong, Fabing Su

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

Abstract

In this work, a cobalt and cerium composite oxide functionalized SBA-15 monolith (SM) with an inner three-dimensional (3D) network structure (CoCe/SM) was prepared by isovolumetric impregnation. Its catalytic activities towards NO_x-assisted soot combustion were evaluated and the loading and Co/Ce ratio were optimized. X-ray diffraction, scanning electron microscopy, energy dispersed spectroscopy, transmission electron microscopy, N₂ adsorption, X-ray photoelectron spectroscopy, H₂ temperature-programmed reduction and O₂ temperature-programmed desorption were employed to characterize the samples. It was revealed that, compared with unsupported Co₃O₄-CeO₂ particles, the CoCe/SM catalysts with optimized Co₃O₄-CeO₂ loading showed much higher catalytic ability, achieving a complete oxidation of the soot to CO₂ below 400 °C in the presence of NO_x, which is attributed to the high dispersion of Co₃O₄-CeO₂ on SM and the cross-linked macroporous structure of SM that can house the soot particulates, thus providing closer contact between the soot and catalytically active sites.

Original language	English
Pages (from-to)	26815-26822
Number of pages	8
Journal	RSC Advances
Volume	5
Issue number	34
DOIs	https://doi.org/10.1039/c4ra16832a
State	Published - 2015
Externally published	Yes

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title = "A Co3O4-CeO2 functionalized SBA-15 monolith with a three-dimensional framework improves NOx-assisted soot combustion",

abstract = "In this work, a cobalt and cerium composite oxide functionalized SBA-15 monolith (SM) with an inner three-dimensional (3D) network structure (CoCe/SM) was prepared by isovolumetric impregnation. Its catalytic activities towards NOx-assisted soot combustion were evaluated and the loading and Co/Ce ratio were optimized. X-ray diffraction, scanning electron microscopy, energy dispersed spectroscopy, transmission electron microscopy, N2 adsorption, X-ray photoelectron spectroscopy, H2 temperature-programmed reduction and O2 temperature-programmed desorption were employed to characterize the samples. It was revealed that, compared with unsupported Co3O4-CeO2 particles, the CoCe/SM catalysts with optimized Co3O4-CeO2 loading showed much higher catalytic ability, achieving a complete oxidation of the soot to CO2 below 400 °C in the presence of NOx, which is attributed to the high dispersion of Co3O4-CeO2 on SM and the cross-linked macroporous structure of SM that can house the soot particulates, thus providing closer contact between the soot and catalytically active sites.",

author = "Qiongqiong Yang and Fangna Gu and Yufang Tang and Hui Zhang and Qing Liu and Ziyi Zhong and Fabing Su",

note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2015.",

year = "2015",

doi = "10.1039/c4ra16832a",

language = "英语",

volume = "5",

pages = "26815--26822",

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T1 - A Co3O4-CeO2 functionalized SBA-15 monolith with a three-dimensional framework improves NOx-assisted soot combustion

AU - Yang, Qiongqiong

AU - Gu, Fangna

AU - Tang, Yufang

AU - Zhang, Hui

AU - Liu, Qing

AU - Zhong, Ziyi

AU - Su, Fabing

PY - 2015

Y1 - 2015

N2 - In this work, a cobalt and cerium composite oxide functionalized SBA-15 monolith (SM) with an inner three-dimensional (3D) network structure (CoCe/SM) was prepared by isovolumetric impregnation. Its catalytic activities towards NOx-assisted soot combustion were evaluated and the loading and Co/Ce ratio were optimized. X-ray diffraction, scanning electron microscopy, energy dispersed spectroscopy, transmission electron microscopy, N2 adsorption, X-ray photoelectron spectroscopy, H2 temperature-programmed reduction and O2 temperature-programmed desorption were employed to characterize the samples. It was revealed that, compared with unsupported Co3O4-CeO2 particles, the CoCe/SM catalysts with optimized Co3O4-CeO2 loading showed much higher catalytic ability, achieving a complete oxidation of the soot to CO2 below 400 °C in the presence of NOx, which is attributed to the high dispersion of Co3O4-CeO2 on SM and the cross-linked macroporous structure of SM that can house the soot particulates, thus providing closer contact between the soot and catalytically active sites.

AB - In this work, a cobalt and cerium composite oxide functionalized SBA-15 monolith (SM) with an inner three-dimensional (3D) network structure (CoCe/SM) was prepared by isovolumetric impregnation. Its catalytic activities towards NOx-assisted soot combustion were evaluated and the loading and Co/Ce ratio were optimized. X-ray diffraction, scanning electron microscopy, energy dispersed spectroscopy, transmission electron microscopy, N2 adsorption, X-ray photoelectron spectroscopy, H2 temperature-programmed reduction and O2 temperature-programmed desorption were employed to characterize the samples. It was revealed that, compared with unsupported Co3O4-CeO2 particles, the CoCe/SM catalysts with optimized Co3O4-CeO2 loading showed much higher catalytic ability, achieving a complete oxidation of the soot to CO2 below 400 °C in the presence of NOx, which is attributed to the high dispersion of Co3O4-CeO2 on SM and the cross-linked macroporous structure of SM that can house the soot particulates, thus providing closer contact between the soot and catalytically active sites.

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U2 - 10.1039/c4ra16832a

DO - 10.1039/c4ra16832a

M3 - 文章

AN - SCOPUS:84925252681

SN - 2046-2069

VL - 5

SP - 26815

EP - 26822

JO - RSC Advances

JF - RSC Advances

IS - 34

ER -

A Co₃O₄-CeO₂ functionalized SBA-15 monolith with a three-dimensional framework improves NO_x-assisted soot combustion

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