Strontium-doped lanthanum cobaltite and manganite: Highly active catalysts for toluene complete oxidation

Jiguang Deng; Lei Zhang; Hongxing Dai; Hong He; Chak Tong AU

doi:10.1021/ie800585x

Strontium-doped lanthanum cobaltite and manganite: Highly active catalysts for toluene complete oxidation

Jiguang Deng, Lei Zhang, Hongxing Dai^*, Hong He, Chak Tong AU

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

120 Citations (Scopus)

Abstract

La_1-xSr_xMO_3-δ (M = Co, Mn; x = 0,0.4) catalysts have been fabricated via a strategy of citric acid complexing and hydrothermal treatment. The oxidation of toluene was used as a probe reaction for the evaluation of catalytic performance. The materials were characterized by a number of techniques. We observed that the catalytic activity (evaluated by the temperature required for 80% conversion of tolucne, T _80%) increased in the sequence of LaMnO_3.10 (T _80% = 295°C) < LaCoO_2.89 (T_80% = 246°C) < La_0.6Sr_0.4MnO_3.03 (T _80% = 233°C) < La_0.6Sr_0.4CoO _2.76 (T_80% = 219°C) at toluene/O₂ molar ratio = 1/400 and space velocity = 20 000 h^-1. Moreover, CO ₂ and H₂O were the only products for toluene oxidation over the catalysts. It is concluded that factors such as enriched structural defects (oxygen vacancies) and good Mn⁴⁺/Mn³⁺ or Co ³⁺/Co²⁺ redox ability are responsible for the excellent catalytic performance of the La_1-xSr_xMO _3-δ nanomaterials.

Original language	English
Pages (from-to)	8175-8183
Number of pages	9
Journal	Industrial and Engineering Chemistry Research
Volume	47
Issue number	21
DOIs	https://doi.org/10.1021/ie800585x
Publication status	Published - 5 Nov 2008

Scopus Subject Areas

General Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

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@article{35006d46d94c4bc9b1944bbe691a7103,

title = "Strontium-doped lanthanum cobaltite and manganite: Highly active catalysts for toluene complete oxidation",

abstract = "La1-xSrxMO3-δ (M = Co, Mn; x = 0,0.4) catalysts have been fabricated via a strategy of citric acid complexing and hydrothermal treatment. The oxidation of toluene was used as a probe reaction for the evaluation of catalytic performance. The materials were characterized by a number of techniques. We observed that the catalytic activity (evaluated by the temperature required for 80% conversion of tolucne, T 80%) increased in the sequence of LaMnO3.10 (T 80% = 295°C) < LaCoO2.89 (T80% = 246°C) < La0.6Sr0.4MnO3.03 (T 80% = 233°C) < La0.6Sr0.4CoO 2.76 (T80% = 219°C) at toluene/O2 molar ratio = 1/400 and space velocity = 20 000 h-1. Moreover, CO 2 and H2O were the only products for toluene oxidation over the catalysts. It is concluded that factors such as enriched structural defects (oxygen vacancies) and good Mn4+/Mn3+ or Co 3+/Co2+ redox ability are responsible for the excellent catalytic performance of the La1-xSrxMO 3-δ nanomaterials.",

author = "Jiguang Deng and Lei Zhang and Hongxing Dai and Hong He and AU, {Chak Tong}",

note = "The work described above was supported by the Beijing Municipal Education Commission (Key Project of Science & Technology Development Plan) and the Natural Science Foundation of Beijing Municipality (Key Class B project of grant number KZ200610005004), and the PHR (IHLB) of Beijing Municipality. C.T.A. thanks the RGC, Hong Kong Special Administration Region (Grant HKBU 2001/06P), for ﬁnancial support.",

year = "2008",

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T1 - Strontium-doped lanthanum cobaltite and manganite

T2 - Highly active catalysts for toluene complete oxidation

AU - Deng, Jiguang

AU - Zhang, Lei

AU - Dai, Hongxing

AU - He, Hong

AU - AU, Chak Tong

N1 - The work described above was supported by the Beijing Municipal Education Commission (Key Project of Science & Technology Development Plan) and the Natural Science Foundation of Beijing Municipality (Key Class B project of grant number KZ200610005004), and the PHR (IHLB) of Beijing Municipality. C.T.A. thanks the RGC, Hong Kong Special Administration Region (Grant HKBU 2001/06P), for ﬁnancial support.

PY - 2008/11/5

Y1 - 2008/11/5

N2 - La1-xSrxMO3-δ (M = Co, Mn; x = 0,0.4) catalysts have been fabricated via a strategy of citric acid complexing and hydrothermal treatment. The oxidation of toluene was used as a probe reaction for the evaluation of catalytic performance. The materials were characterized by a number of techniques. We observed that the catalytic activity (evaluated by the temperature required for 80% conversion of tolucne, T 80%) increased in the sequence of LaMnO3.10 (T 80% = 295°C) < LaCoO2.89 (T80% = 246°C) < La0.6Sr0.4MnO3.03 (T 80% = 233°C) < La0.6Sr0.4CoO 2.76 (T80% = 219°C) at toluene/O2 molar ratio = 1/400 and space velocity = 20 000 h-1. Moreover, CO 2 and H2O were the only products for toluene oxidation over the catalysts. It is concluded that factors such as enriched structural defects (oxygen vacancies) and good Mn4+/Mn3+ or Co 3+/Co2+ redox ability are responsible for the excellent catalytic performance of the La1-xSrxMO 3-δ nanomaterials.

AB - La1-xSrxMO3-δ (M = Co, Mn; x = 0,0.4) catalysts have been fabricated via a strategy of citric acid complexing and hydrothermal treatment. The oxidation of toluene was used as a probe reaction for the evaluation of catalytic performance. The materials were characterized by a number of techniques. We observed that the catalytic activity (evaluated by the temperature required for 80% conversion of tolucne, T 80%) increased in the sequence of LaMnO3.10 (T 80% = 295°C) < LaCoO2.89 (T80% = 246°C) < La0.6Sr0.4MnO3.03 (T 80% = 233°C) < La0.6Sr0.4CoO 2.76 (T80% = 219°C) at toluene/O2 molar ratio = 1/400 and space velocity = 20 000 h-1. Moreover, CO 2 and H2O were the only products for toluene oxidation over the catalysts. It is concluded that factors such as enriched structural defects (oxygen vacancies) and good Mn4+/Mn3+ or Co 3+/Co2+ redox ability are responsible for the excellent catalytic performance of the La1-xSrxMO 3-δ nanomaterials.

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JO - Industrial and Engineering Chemistry Research

JF - Industrial and Engineering Chemistry Research

IS - 21

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Strontium-doped lanthanum cobaltite and manganite: Highly active catalysts for toluene complete oxidation

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