Mn/Co Redox Cycle Promoted Catalytic Performance of Mesoporous SiO2-Confined Highly Dispersed LaMnxCo1-xO3 Perovskite Oxides in n-Butylamine Combustion

Wei Cui; Huawei Chen; Qing Liu; Mifen Cui; Xian Chen; Zhaoyang Fei; Jincan Huang; Zuliang Tao; Minghong Wang; Xu Qiao

doi:10.1002/slct.202002076

Mn/Co Redox Cycle Promoted Catalytic Performance of Mesoporous SiO₂-Confined Highly Dispersed LaMn_xCo_1-xO₃ Perovskite Oxides in n-Butylamine Combustion

Wei Cui, Huawei Chen, Qing Liu, Mifen Cui, Xian Chen, Zhaoyang Fei, Jincan Huang, Zuliang Tao, Minghong Wang, Xu Qiao

COLLEGE OF CHEMICAL ENGINEERING

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

4 Scopus citations

Abstract

In this study, highly-dispersed perovskite-type oxides LaMn_xCo_1-xO₃ supported on mesoporous SiO₂ (LM_xC_1-xO/SiO₂) were synthesized by a citric acid-assisted deposition method. For LM_xC_1-xO/SiO₂ catalysts, the double B-site transition metal ions can not only significantly arise the surface defects, but also lead to the formation of (Mn³⁺+Co³⁺)/(Co²⁺+Mn⁴⁺) redox cycle, both of which were able to improve the catalytic performance of LM_xC_1-xO/SiO₂ in n-butylamine combustion. Strikingly, LM_0.2C_0.8O/SiO₂ catalyst showed the optimum catalytic performance (T_90%=210 °C at a space velocity of 15,000 mL g_cat⁻¹ h⁻¹) and the lowest NO_x yield among the LM_xC_1-xO/SiO₂ samples, which could be greatly assigned to the accelerated activation and circulation of the oxygen species initiated by the surface defects and redox cycle.

Original language	English
Pages (from-to)	8504-8511
Number of pages	8
Journal	ChemistrySelect
Volume	5
Issue number	28
DOIs	https://doi.org/10.1002/slct.202002076
State	Published - 31 Jul 2020

Keywords

B-site substitution
LMCO/SiO catalyst
Mn/Co redox couple
N-butylamine combustion

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title = "Mn/Co Redox Cycle Promoted Catalytic Performance of Mesoporous SiO2-Confined Highly Dispersed LaMnxCo1-xO3 Perovskite Oxides in n-Butylamine Combustion",

abstract = "In this study, highly-dispersed perovskite-type oxides LaMnxCo1-xO3 supported on mesoporous SiO2 (LMxC1-xO/SiO2) were synthesized by a citric acid-assisted deposition method. For LMxC1-xO/SiO2 catalysts, the double B-site transition metal ions can not only significantly arise the surface defects, but also lead to the formation of (Mn3++Co3+)/(Co2++Mn4+) redox cycle, both of which were able to improve the catalytic performance of LMxC1-xO/SiO2 in n-butylamine combustion. Strikingly, LM0.2C0.8O/SiO2 catalyst showed the optimum catalytic performance (T90%=210 °C at a space velocity of 15,000 mL gcat−1 h−1) and the lowest NOx yield among the LMxC1-xO/SiO2 samples, which could be greatly assigned to the accelerated activation and circulation of the oxygen species initiated by the surface defects and redox cycle.",

keywords = "B-site substitution, LMCO/SiO catalyst, Mn/Co redox couple, N-butylamine combustion",

author = "Wei Cui and Huawei Chen and Qing Liu and Mifen Cui and Xian Chen and Zhaoyang Fei and Jincan Huang and Zuliang Tao and Minghong Wang and Xu Qiao",

note = "Publisher Copyright: {\textcopyright} 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",

year = "2020",

month = jul,

day = "31",

doi = "10.1002/slct.202002076",

language = "英语",

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T1 - Mn/Co Redox Cycle Promoted Catalytic Performance of Mesoporous SiO2-Confined Highly Dispersed LaMnxCo1-xO3 Perovskite Oxides in n-Butylamine Combustion

AU - Cui, Wei

AU - Chen, Huawei

AU - Liu, Qing

AU - Cui, Mifen

AU - Chen, Xian

AU - Fei, Zhaoyang

AU - Huang, Jincan

AU - Tao, Zuliang

AU - Wang, Minghong

AU - Qiao, Xu

PY - 2020/7/31

Y1 - 2020/7/31

N2 - In this study, highly-dispersed perovskite-type oxides LaMnxCo1-xO3 supported on mesoporous SiO2 (LMxC1-xO/SiO2) were synthesized by a citric acid-assisted deposition method. For LMxC1-xO/SiO2 catalysts, the double B-site transition metal ions can not only significantly arise the surface defects, but also lead to the formation of (Mn3++Co3+)/(Co2++Mn4+) redox cycle, both of which were able to improve the catalytic performance of LMxC1-xO/SiO2 in n-butylamine combustion. Strikingly, LM0.2C0.8O/SiO2 catalyst showed the optimum catalytic performance (T90%=210 °C at a space velocity of 15,000 mL gcat−1 h−1) and the lowest NOx yield among the LMxC1-xO/SiO2 samples, which could be greatly assigned to the accelerated activation and circulation of the oxygen species initiated by the surface defects and redox cycle.

AB - In this study, highly-dispersed perovskite-type oxides LaMnxCo1-xO3 supported on mesoporous SiO2 (LMxC1-xO/SiO2) were synthesized by a citric acid-assisted deposition method. For LMxC1-xO/SiO2 catalysts, the double B-site transition metal ions can not only significantly arise the surface defects, but also lead to the formation of (Mn3++Co3+)/(Co2++Mn4+) redox cycle, both of which were able to improve the catalytic performance of LMxC1-xO/SiO2 in n-butylamine combustion. Strikingly, LM0.2C0.8O/SiO2 catalyst showed the optimum catalytic performance (T90%=210 °C at a space velocity of 15,000 mL gcat−1 h−1) and the lowest NOx yield among the LMxC1-xO/SiO2 samples, which could be greatly assigned to the accelerated activation and circulation of the oxygen species initiated by the surface defects and redox cycle.

KW - B-site substitution

KW - LMCO/SiO catalyst

KW - Mn/Co redox couple

KW - N-butylamine combustion

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U2 - 10.1002/slct.202002076

DO - 10.1002/slct.202002076

M3 - 文章

AN - SCOPUS:85088843372

SN - 2365-6549

VL - 5

SP - 8504

EP - 8511

JO - ChemistrySelect

JF - ChemistrySelect

IS - 28

ER -

Mn/Co Redox Cycle Promoted Catalytic Performance of Mesoporous SiO₂-Confined Highly Dispersed LaMn_xCo_1-xO₃ Perovskite Oxides in n-Butylamine Combustion

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