Hydrothermal Fabrication and Catalytic Properties of la 1-xSrxM1-yFeyO3 (M = Mn, Co) That Are Highly Active for the Removal of Toluene

Jiguang Deng; Hongxing Dai; Haiyan Jiang; Lei Zhang; Guozhi Wang; Hong He; A. U. Chak Tong

doi:10.1021/es9031997

Hydrothermal Fabrication and Catalytic Properties of la _1-xSr_xM_1-yFe_yO₃ (M = Mn, Co) That Are Highly Active for the Removal of Toluene

Jiguang Deng, Hongxing Dai^*, Haiyan Jiang, Lei Zhang, Guozhi Wang, Hong He, A. U. Chak Tong

^*Corresponding author for this work

Department of Chemistry

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

103 Citations (Scopus)

Abstract

A series of La_1-xSr_xM_1-yFe _yO₃ (M = Mn, Co; X = 0,0.4; y = 0.1,1.0) perovskite-type oxide catalysts have been fabricated via a strategy of citric acid complexation coupled with hydrothermal treatment. The materials are characterized by a number of analytical techniques. The oxidation of toluene is used as a probe reaction for the evaluation of catalytic performance. It is found that both La _0.6Sr_0.4FeO₃ and LaFeO₃ exhibit high activities. The partial substitution of manganese and cobalt with iron can significantly improve the catalytic performance of La_0.6Sr _0.4MnO₃ and La_0.6Sr_0.4CoO ₃. At toluene/O₂ molar ratio = 1/200 and space velocity = 20 000 h^-1, the catalytic activity decreases in the sequence of La_0.6Sr_0.4Co_0.9Fe_0.1O₃ > La_0.6Sr_0.4FeO₃ > La _0.6Sr_0.4Mn_0.9Fe_0.1O₃ > LaFeO₃ > La_0.6Sr_0.4CoO₃ > La_0.6Sr_0.4MnO₃. Compared to the Fe-free counterparts, the La_0.6Sr_0.4Mn_0.9Fe _0.1O₃ and La_0.6Sr_0.4Co _0.9Fe_0.1O₃ catalysts are, respectively, 50 and 85 °C lower with regard to the temperature required for complete toluene oxidation. Toluene can be completely oxidized at 245 °C over La _0.6Sr_0.4Co_0.9Fe_0.1O₃. The excellent catalytic performance of La_0.6Sr_0.4Co _0.9Fe_0.1O₃ can be attributed to the presence of (i) Fe³⁺-O-Fe⁴⁺ couples, (ii) a transition of electronic structure, and (iii) a trace amount of Co₃O₄.

Original language	English
Pages (from-to)	2618-2623
Number of pages	6
Journal	Environmental Science and Technology
Volume	44
Issue number	7
DOIs	https://doi.org/10.1021/es9031997
Publication status	Published - 1 Apr 2010

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General Chemistry
Environmental Chemistry

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@article{c684766889f245769017f975ffcf5232,

title = "Hydrothermal Fabrication and Catalytic Properties of la 1-xSrxM1-yFeyO3 (M = Mn, Co) That Are Highly Active for the Removal of Toluene",

abstract = "A series of La1-xSrxM1-yFe yO3 (M = Mn, Co; X = 0,0.4; y = 0.1,1.0) perovskite-type oxide catalysts have been fabricated via a strategy of citric acid complexation coupled with hydrothermal treatment. The materials are characterized by a number of analytical techniques. The oxidation of toluene is used as a probe reaction for the evaluation of catalytic performance. It is found that both La 0.6Sr0.4FeO3 and LaFeO3 exhibit high activities. The partial substitution of manganese and cobalt with iron can significantly improve the catalytic performance of La0.6Sr 0.4MnO3 and La0.6Sr0.4CoO 3. At toluene/O2 molar ratio = 1/200 and space velocity = 20 000 h-1, the catalytic activity decreases in the sequence of La0.6Sr0.4Co0.9Fe0.1O3 > La0.6Sr0.4FeO3 > La 0.6Sr0.4Mn0.9Fe0.1O3 > LaFeO3 > La0.6Sr0.4CoO3 > La0.6Sr0.4MnO3. Compared to the Fe-free counterparts, the La0.6Sr0.4Mn0.9Fe 0.1O3 and La0.6Sr0.4Co 0.9Fe0.1O3 catalysts are, respectively, 50 and 85 °C lower with regard to the temperature required for complete toluene oxidation. Toluene can be completely oxidized at 245 °C over La 0.6Sr0.4Co0.9Fe0.1O3. The excellent catalytic performance of La0.6Sr0.4Co 0.9Fe0.1O3 can be attributed to the presence of (i) Fe3+-O-Fe4+ couples, (ii) a transition of electronic structure, and (iii) a trace amount of Co3O4.",

author = "Jiguang Deng and Hongxing Dai and Haiyan Jiang and Lei Zhang and Guozhi Wang and Hong He and {Chak Tong}, {A. U.}",

note = "The work described above was supported by the NSFC (20973017), PHR200907105, and KZ200610005004 projects. C.T.A. thanks the RGC, HKSAR for ﬁnancial support (HKBU200106). ",

year = "2010",

month = apr,

day = "1",

doi = "10.1021/es9031997",

language = "English",

volume = "44",

pages = "2618--2623",

journal = "Environmental Science and Technology",

issn = "0013-936X",

publisher = "American Chemical Society",

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T1 - Hydrothermal Fabrication and Catalytic Properties of la 1-xSrxM1-yFeyO3 (M = Mn, Co) That Are Highly Active for the Removal of Toluene

AU - Deng, Jiguang

AU - Dai, Hongxing

AU - Jiang, Haiyan

AU - Zhang, Lei

AU - Wang, Guozhi

AU - He, Hong

AU - Chak Tong, A. U.

N1 - The work described above was supported by the NSFC (20973017), PHR200907105, and KZ200610005004 projects. C.T.A. thanks the RGC, HKSAR for ﬁnancial support (HKBU200106).

PY - 2010/4/1

Y1 - 2010/4/1

N2 - A series of La1-xSrxM1-yFe yO3 (M = Mn, Co; X = 0,0.4; y = 0.1,1.0) perovskite-type oxide catalysts have been fabricated via a strategy of citric acid complexation coupled with hydrothermal treatment. The materials are characterized by a number of analytical techniques. The oxidation of toluene is used as a probe reaction for the evaluation of catalytic performance. It is found that both La 0.6Sr0.4FeO3 and LaFeO3 exhibit high activities. The partial substitution of manganese and cobalt with iron can significantly improve the catalytic performance of La0.6Sr 0.4MnO3 and La0.6Sr0.4CoO 3. At toluene/O2 molar ratio = 1/200 and space velocity = 20 000 h-1, the catalytic activity decreases in the sequence of La0.6Sr0.4Co0.9Fe0.1O3 > La0.6Sr0.4FeO3 > La 0.6Sr0.4Mn0.9Fe0.1O3 > LaFeO3 > La0.6Sr0.4CoO3 > La0.6Sr0.4MnO3. Compared to the Fe-free counterparts, the La0.6Sr0.4Mn0.9Fe 0.1O3 and La0.6Sr0.4Co 0.9Fe0.1O3 catalysts are, respectively, 50 and 85 °C lower with regard to the temperature required for complete toluene oxidation. Toluene can be completely oxidized at 245 °C over La 0.6Sr0.4Co0.9Fe0.1O3. The excellent catalytic performance of La0.6Sr0.4Co 0.9Fe0.1O3 can be attributed to the presence of (i) Fe3+-O-Fe4+ couples, (ii) a transition of electronic structure, and (iii) a trace amount of Co3O4.

AB - A series of La1-xSrxM1-yFe yO3 (M = Mn, Co; X = 0,0.4; y = 0.1,1.0) perovskite-type oxide catalysts have been fabricated via a strategy of citric acid complexation coupled with hydrothermal treatment. The materials are characterized by a number of analytical techniques. The oxidation of toluene is used as a probe reaction for the evaluation of catalytic performance. It is found that both La 0.6Sr0.4FeO3 and LaFeO3 exhibit high activities. The partial substitution of manganese and cobalt with iron can significantly improve the catalytic performance of La0.6Sr 0.4MnO3 and La0.6Sr0.4CoO 3. At toluene/O2 molar ratio = 1/200 and space velocity = 20 000 h-1, the catalytic activity decreases in the sequence of La0.6Sr0.4Co0.9Fe0.1O3 > La0.6Sr0.4FeO3 > La 0.6Sr0.4Mn0.9Fe0.1O3 > LaFeO3 > La0.6Sr0.4CoO3 > La0.6Sr0.4MnO3. Compared to the Fe-free counterparts, the La0.6Sr0.4Mn0.9Fe 0.1O3 and La0.6Sr0.4Co 0.9Fe0.1O3 catalysts are, respectively, 50 and 85 °C lower with regard to the temperature required for complete toluene oxidation. Toluene can be completely oxidized at 245 °C over La 0.6Sr0.4Co0.9Fe0.1O3. The excellent catalytic performance of La0.6Sr0.4Co 0.9Fe0.1O3 can be attributed to the presence of (i) Fe3+-O-Fe4+ couples, (ii) a transition of electronic structure, and (iii) a trace amount of Co3O4.

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U2 - 10.1021/es9031997

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SN - 0013-936X

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Hydrothermal Fabrication and Catalytic Properties of la _1-xSr_xM_1-yFe_yO₃ (M = Mn, Co) That Are Highly Active for the Removal of Toluene

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