A novel strategy to adjust the oxygen vacancy of CuO/MnO2 catalysts toward the catalytic oxidation of toluene

Wei Liu; Wenjie Xiang; Xi Chen; Zhongxian Song; Chunxiang Gao; Noritatsu Tsubaki; Xuejun Zhang

doi:10.1016/j.fuel.2021.122975

A novel strategy to adjust the oxygen vacancy of CuO/MnO₂ catalysts toward the catalytic oxidation of toluene

Wei Liu, Wenjie Xiang, Xi Chen, Zhongxian Song, Chunxiang Gao, Noritatsu Tsubaki^*, Xuejun Zhang

^*Corresponding author for this work

Applied Chemistry

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

64 Scopus citations

Abstract

A facile and efficient solid-state redox strategy with low consumption was applied to modify the surface defect concentration of α-MnO₂. The surficial reduction of α-MnO₂ by Cu₂O tremendously increased the concentration of oxygen vacancy of the as-synthesized CuO/MnO₂-R catalyst, which significantly enhanced its catalytic performance for the combustion of toluene. The T₉₀ of CuO/MnO₂-R-10 catalyst obtained by strengthening surface defects was 36 °C and 32 °C lower than α-MnO₂ and CuO/MnO₂-10 catalyst, respectively, which could be contributed to the increase of structural defects. In addition, the reaction mechanism of toluene over the surface of CuO/MnO₂-R-10 was also revealed by in-situ DRIFTS. Meanwhile, the CuO/MnO₂-R-10 also exhibited excellent stability and resistance to water vapor and showed great potential in practical application.

Original language	English
Article number	122975
Journal	Fuel
Volume	312
DOIs	https://doi.org/10.1016/j.fuel.2021.122975
State	Published - 2022/03/15

Keywords

Catalytic oxidation of toluene
CuO/MnO catalysts
Oxygen defects
Solid-state redox

ASJC Scopus subject areas

General Chemical Engineering
Fuel Technology
Energy Engineering and Power Technology
Organic Chemistry

Access to Document

10.1016/j.fuel.2021.122975

Cite this

@article{54829534804c43e0ac434b989cdeb862,

title = "A novel strategy to adjust the oxygen vacancy of CuO/MnO2 catalysts toward the catalytic oxidation of toluene",

abstract = "A facile and efficient solid-state redox strategy with low consumption was applied to modify the surface defect concentration of α-MnO2. The surficial reduction of α-MnO2 by Cu2O tremendously increased the concentration of oxygen vacancy of the as-synthesized CuO/MnO2-R catalyst, which significantly enhanced its catalytic performance for the combustion of toluene. The T90 of CuO/MnO2-R-10 catalyst obtained by strengthening surface defects was 36 °C and 32 °C lower than α-MnO2 and CuO/MnO2-10 catalyst, respectively, which could be contributed to the increase of structural defects. In addition, the reaction mechanism of toluene over the surface of CuO/MnO2-R-10 was also revealed by in-situ DRIFTS. Meanwhile, the CuO/MnO2-R-10 also exhibited excellent stability and resistance to water vapor and showed great potential in practical application.",

keywords = "Catalytic oxidation of toluene, CuO/MnO catalysts, Oxygen defects, Solid-state redox",

author = "Wei Liu and Wenjie Xiang and Xi Chen and Zhongxian Song and Chunxiang Gao and Noritatsu Tsubaki and Xuejun Zhang",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

year = "2022",

month = mar,

day = "15",

doi = "10.1016/j.fuel.2021.122975",

language = "英語",

volume = "312",

journal = "Fuel",

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TY - JOUR

T1 - A novel strategy to adjust the oxygen vacancy of CuO/MnO2 catalysts toward the catalytic oxidation of toluene

AU - Liu, Wei

AU - Xiang, Wenjie

AU - Chen, Xi

AU - Song, Zhongxian

AU - Gao, Chunxiang

AU - Tsubaki, Noritatsu

AU - Zhang, Xuejun

PY - 2022/3/15

Y1 - 2022/3/15

N2 - A facile and efficient solid-state redox strategy with low consumption was applied to modify the surface defect concentration of α-MnO2. The surficial reduction of α-MnO2 by Cu2O tremendously increased the concentration of oxygen vacancy of the as-synthesized CuO/MnO2-R catalyst, which significantly enhanced its catalytic performance for the combustion of toluene. The T90 of CuO/MnO2-R-10 catalyst obtained by strengthening surface defects was 36 °C and 32 °C lower than α-MnO2 and CuO/MnO2-10 catalyst, respectively, which could be contributed to the increase of structural defects. In addition, the reaction mechanism of toluene over the surface of CuO/MnO2-R-10 was also revealed by in-situ DRIFTS. Meanwhile, the CuO/MnO2-R-10 also exhibited excellent stability and resistance to water vapor and showed great potential in practical application.

AB - A facile and efficient solid-state redox strategy with low consumption was applied to modify the surface defect concentration of α-MnO2. The surficial reduction of α-MnO2 by Cu2O tremendously increased the concentration of oxygen vacancy of the as-synthesized CuO/MnO2-R catalyst, which significantly enhanced its catalytic performance for the combustion of toluene. The T90 of CuO/MnO2-R-10 catalyst obtained by strengthening surface defects was 36 °C and 32 °C lower than α-MnO2 and CuO/MnO2-10 catalyst, respectively, which could be contributed to the increase of structural defects. In addition, the reaction mechanism of toluene over the surface of CuO/MnO2-R-10 was also revealed by in-situ DRIFTS. Meanwhile, the CuO/MnO2-R-10 also exhibited excellent stability and resistance to water vapor and showed great potential in practical application.

KW - Catalytic oxidation of toluene

KW - CuO/MnO catalysts

KW - Oxygen defects

KW - Solid-state redox

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DO - 10.1016/j.fuel.2021.122975

M3 - 学術論文

AN - SCOPUS:85121459290

SN - 0016-2361

VL - 312

JO - Fuel

JF - Fuel

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