Hierarchically Interconnected Porous Mn Co3-O4 Spinels for Low-temperature Catalytic Reduction of NO by CO

Shaomian Liu; Yongjun Ji; Wenqing Xu; Jianling Zhang; Ruihuan Jiang; Liang Li; Lihua Jia; Ziyi Zhong; Guangwen Xu; Tingyu Zhu; Fabing Su

doi:10.1016/j.jcat.2021.12.023

Hierarchically Interconnected Porous Mn Co3-O4 Spinels for Low-temperature Catalytic Reduction of NO by CO

Shaomian Liu, Yongjun Ji^*, Wenqing Xu^*, Jianling Zhang, Ruihuan Jiang, Liang Li, Lihua Jia, Ziyi Zhong^*, Guangwen Xu, Tingyu Zhu, Fabing Su^*

^*Corresponding author for this work

Chemical Engineering

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

19 Scopus citations

Abstract

Developing efficient catalysts for low reaction-temperature catalytic reduction of NO by CO (CO–DeNOx) is desirable but very challenging. Here, we report that hierarchically interconnected porous (HIP) MnxCo3-xO4 spinels, synthesized by a facile citric acid-assisted sol-gel method, can act as highly efficient catalysts for CO–DeNOx. The obtained Mn0.3Co2.7O4 displayed a much-enhanced catalytic performance with 87% NO removal at 100 °C and a wide active-temperature window (100–400 °C). Its superior activity stems from the following reasons: (i) the high-valence of Mn3+, Mn4+, and Co3+ species in the Co–O–Mn structure enables the high catalytic activity and the effective redox-cycling of the Co3+ and Co2+ adsorption sites; (ii) the HIP structure can significantly enhance gas diffusion. This work offers an avenue to design metal oxide catalysts for CO–DeNOx by effectively controlling the doping metal concentration and oxidation states of the active components.

Original language	English
Journal	Journal of Catalysis
DOIs	https://doi.org/10.1016/j.jcat.2021.12.023
State	E-pub ahead of print - 5 Jan 2022

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@article{d59bb34c23dc49b8960352985da66b78,

title = "Hierarchically Interconnected Porous Mn Co3-O4 Spinels for Low-temperature Catalytic Reduction of NO by CO",

abstract = "Developing efficient catalysts for low reaction-temperature catalytic reduction of NO by CO (CO–DeNOx) is desirable but very challenging. Here, we report that hierarchically interconnected porous (HIP) MnxCo3-xO4 spinels, synthesized by a facile citric acid-assisted sol-gel method, can act as highly efficient catalysts for CO–DeNOx. The obtained Mn0.3Co2.7O4 displayed a much-enhanced catalytic performance with 87% NO removal at 100 °C and a wide active-temperature window (100–400 °C). Its superior activity stems from the following reasons: (i) the high-valence of Mn3+, Mn4+, and Co3+ species in the Co–O–Mn structure enables the high catalytic activity and the effective redox-cycling of the Co3+ and Co2+ adsorption sites; (ii) the HIP structure can significantly enhance gas diffusion. This work offers an avenue to design metal oxide catalysts for CO–DeNOx by effectively controlling the doping metal concentration and oxidation states of the active components.",

author = "Shaomian Liu and Yongjun Ji and Wenqing Xu and Jianling Zhang and Ruihuan Jiang and Liang Li and Lihua Jia and Ziyi Zhong and Guangwen Xu and Tingyu Zhu and Fabing Su",

year = "2022",

month = jan,

day = "5",

doi = "10.1016/j.jcat.2021.12.023",

language = "英语",

journal = "Journal of Catalysis",

issn = "0021-9517",

publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - Hierarchically Interconnected Porous Mn Co3-O4 Spinels for Low-temperature Catalytic Reduction of NO by CO

AU - Liu, Shaomian

AU - Ji, Yongjun

AU - Xu, Wenqing

AU - Zhang, Jianling

AU - Jiang, Ruihuan

AU - Li, Liang

AU - Jia, Lihua

AU - Zhong, Ziyi

AU - Xu, Guangwen

AU - Zhu, Tingyu

AU - Su, Fabing

PY - 2022/1/5

Y1 - 2022/1/5

N2 - Developing efficient catalysts for low reaction-temperature catalytic reduction of NO by CO (CO–DeNOx) is desirable but very challenging. Here, we report that hierarchically interconnected porous (HIP) MnxCo3-xO4 spinels, synthesized by a facile citric acid-assisted sol-gel method, can act as highly efficient catalysts for CO–DeNOx. The obtained Mn0.3Co2.7O4 displayed a much-enhanced catalytic performance with 87% NO removal at 100 °C and a wide active-temperature window (100–400 °C). Its superior activity stems from the following reasons: (i) the high-valence of Mn3+, Mn4+, and Co3+ species in the Co–O–Mn structure enables the high catalytic activity and the effective redox-cycling of the Co3+ and Co2+ adsorption sites; (ii) the HIP structure can significantly enhance gas diffusion. This work offers an avenue to design metal oxide catalysts for CO–DeNOx by effectively controlling the doping metal concentration and oxidation states of the active components.

AB - Developing efficient catalysts for low reaction-temperature catalytic reduction of NO by CO (CO–DeNOx) is desirable but very challenging. Here, we report that hierarchically interconnected porous (HIP) MnxCo3-xO4 spinels, synthesized by a facile citric acid-assisted sol-gel method, can act as highly efficient catalysts for CO–DeNOx. The obtained Mn0.3Co2.7O4 displayed a much-enhanced catalytic performance with 87% NO removal at 100 °C and a wide active-temperature window (100–400 °C). Its superior activity stems from the following reasons: (i) the high-valence of Mn3+, Mn4+, and Co3+ species in the Co–O–Mn structure enables the high catalytic activity and the effective redox-cycling of the Co3+ and Co2+ adsorption sites; (ii) the HIP structure can significantly enhance gas diffusion. This work offers an avenue to design metal oxide catalysts for CO–DeNOx by effectively controlling the doping metal concentration and oxidation states of the active components.

U2 - 10.1016/j.jcat.2021.12.023

DO - 10.1016/j.jcat.2021.12.023

M3 - 文章

SN - 0021-9517

JO - Journal of Catalysis

JF - Journal of Catalysis

ER -

Hierarchically Interconnected Porous Mn Co3-O4 Spinels for Low-temperature Catalytic Reduction of NO by CO

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