Effects of Fe dopants and residual carbonates on the catalytic activities of the perovskite-type La0.7Sr0.3Co1-xFexO3 NOx storage catalyst

Ai Jing Ma; Shao Zeng Wang; Cheng Liu; Hui Xian; Quan Ding; Li Guo; Ming Meng; Yi Sheng Tan; Noritatsu Tsubaki; Jing Zhang; Li Rong Zheng; Xin Gang Li

doi:10.1016/j.apcatb.2013.06.005

Effects of Fe dopants and residual carbonates on the catalytic activities of the perovskite-type La_0.7Sr_0.3Co_1-xFe_xO₃ NO_x storage catalyst

Ai Jing Ma, Shao Zeng Wang, Cheng Liu, Hui Xian, Quan Ding, Li Guo, Ming Meng, Yi Sheng Tan, Noritatsu Tsubaki, Jing Zhang, Li Rong Zheng, Xin Gang Li^*

^*Corresponding author for this work

Applied Chemistry

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

66 Scopus citations

Abstract

Herein, we reported the NO_x storage capacity, NO oxidation ability and sulfur resistance of the La_0.7Sr_0.3CoO₃-based perovskite-type catalysts. NO could be readily oxidized to NO₂ with around 83% of NO-to-NO₂ conversion at 300°C over the perovskite. After sulfation, the NSC of the La_0.7Sr_0.3CoO₃ catalyst calcined in static air decreased 58.0%. Nevertheless, a significant improvement of the sulfur tolerance could be achieved through partial substitution of Co with Fe cations, as well as calcination in flowing air. The NSC of the pre-sulfated La_0.7Sr_0.3Co_0.8Fe_0.2O₃ catalyst maintained 360.7μmol/g and dropped only 6.4% as compared with the fresh one. The XPS results confirmed the presence of Fe₂(SO₄)₃ in the sulfated La_0.7Sr_0.3Co_0.8Fe_0.2O₃ catalyst. The EXAFS results further revealed that the formation of Fe₂(SO₄)₃ in the perovskite inhibited the sulfation of neighboring strontium from the viewpoint of the local atomic level. These findings strongly suggest that the La_0.7Sr_0.3Co_0.8Fe_0.2O₃ perovskite is a possible NO_x absorber used for aftertreatment systems upon lean-burn engines with the advantages of the excellent NO oxidation ability, NO_x storage capacity and the high sulfur tolerance.

Original language	English
Pages (from-to)	24-34
Number of pages	11
Journal	Applied Catalysis B: Environmental
Volume	146
DOIs	https://doi.org/10.1016/j.apcatb.2013.06.005
State	Published - 2014/03

Keywords

Carbonates
Fe dopant
NO storage
Perovskite
Sulfur tolerance

ASJC Scopus subject areas

Catalysis
General Environmental Science
Process Chemistry and Technology

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10.1016/j.apcatb.2013.06.005

Cite this

Ma, A. J., Wang, S. Z., Liu, C., Xian, H., Ding, Q., Guo, L., Meng, M., Tan, Y. S., Tsubaki, N., Zhang, J., Zheng, L. R., & Li, X. G. (2014). Effects of Fe dopants and residual carbonates on the catalytic activities of the perovskite-type La_0.7Sr_0.3Co_1-xFe_xO₃ NO_x storage catalyst. Applied Catalysis B: Environmental, 146, 24-34. https://doi.org/10.1016/j.apcatb.2013.06.005

@article{b492fcc502044457970d03958d18176a,

title = "Effects of Fe dopants and residual carbonates on the catalytic activities of the perovskite-type La0.7Sr0.3Co1-xFexO3 NOx storage catalyst",

abstract = "Herein, we reported the NOx storage capacity, NO oxidation ability and sulfur resistance of the La0.7Sr0.3CoO3-based perovskite-type catalysts. NO could be readily oxidized to NO2 with around 83% of NO-to-NO2 conversion at 300°C over the perovskite. After sulfation, the NSC of the La0.7Sr0.3CoO3 catalyst calcined in static air decreased 58.0%. Nevertheless, a significant improvement of the sulfur tolerance could be achieved through partial substitution of Co with Fe cations, as well as calcination in flowing air. The NSC of the pre-sulfated La0.7Sr0.3Co0.8Fe0.2O3 catalyst maintained 360.7μmol/g and dropped only 6.4% as compared with the fresh one. The XPS results confirmed the presence of Fe2(SO4)3 in the sulfated La0.7Sr0.3Co0.8Fe0.2O3 catalyst. The EXAFS results further revealed that the formation of Fe2(SO4)3 in the perovskite inhibited the sulfation of neighboring strontium from the viewpoint of the local atomic level. These findings strongly suggest that the La0.7Sr0.3Co0.8Fe0.2O3 perovskite is a possible NOx absorber used for aftertreatment systems upon lean-burn engines with the advantages of the excellent NO oxidation ability, NOx storage capacity and the high sulfur tolerance.",

keywords = "Carbonates, Fe dopant, NO storage, Perovskite, Sulfur tolerance",

author = "Ma, {Ai Jing} and Wang, {Shao Zeng} and Cheng Liu and Hui Xian and Quan Ding and Li Guo and Ming Meng and Tan, {Yi Sheng} and Noritatsu Tsubaki and Jing Zhang and Zheng, {Li Rong} and Li, {Xin Gang}",

note = "Funding Information: This work was financially supported by the National Natural Science Foundation of China ( U1162103 , U1232118 ), the “863 Program” of the Ministry of Science & Technology of China ( 2008AA06Z323 ), the Natural Science Foundation of Tianjin ( 11JCYBJC03700 ), the Program for New Century Excellent Talents in University of China ( NCET-10-0615 ), the Program for Introducing Talents of Discipline to Universities of China (No. B06006 ), the State Key Laboratory of Coal Conversion (No. J12-13-902 ) and the Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University . ",

year = "2014",

month = mar,

doi = "10.1016/j.apcatb.2013.06.005",

language = "英語",

volume = "146",

pages = "24--34",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Effects of Fe dopants and residual carbonates on the catalytic activities of the perovskite-type La0.7Sr0.3Co1-xFexO3 NOx storage catalyst

AU - Ma, Ai Jing

AU - Wang, Shao Zeng

AU - Liu, Cheng

AU - Xian, Hui

AU - Ding, Quan

AU - Guo, Li

AU - Meng, Ming

AU - Tan, Yi Sheng

AU - Tsubaki, Noritatsu

AU - Zhang, Jing

AU - Zheng, Li Rong

AU - Li, Xin Gang

N1 - Funding Information: This work was financially supported by the National Natural Science Foundation of China ( U1162103 , U1232118 ), the “863 Program” of the Ministry of Science & Technology of China ( 2008AA06Z323 ), the Natural Science Foundation of Tianjin ( 11JCYBJC03700 ), the Program for New Century Excellent Talents in University of China ( NCET-10-0615 ), the Program for Introducing Talents of Discipline to Universities of China (No. B06006 ), the State Key Laboratory of Coal Conversion (No. J12-13-902 ) and the Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University .

PY - 2014/3

Y1 - 2014/3

N2 - Herein, we reported the NOx storage capacity, NO oxidation ability and sulfur resistance of the La0.7Sr0.3CoO3-based perovskite-type catalysts. NO could be readily oxidized to NO2 with around 83% of NO-to-NO2 conversion at 300°C over the perovskite. After sulfation, the NSC of the La0.7Sr0.3CoO3 catalyst calcined in static air decreased 58.0%. Nevertheless, a significant improvement of the sulfur tolerance could be achieved through partial substitution of Co with Fe cations, as well as calcination in flowing air. The NSC of the pre-sulfated La0.7Sr0.3Co0.8Fe0.2O3 catalyst maintained 360.7μmol/g and dropped only 6.4% as compared with the fresh one. The XPS results confirmed the presence of Fe2(SO4)3 in the sulfated La0.7Sr0.3Co0.8Fe0.2O3 catalyst. The EXAFS results further revealed that the formation of Fe2(SO4)3 in the perovskite inhibited the sulfation of neighboring strontium from the viewpoint of the local atomic level. These findings strongly suggest that the La0.7Sr0.3Co0.8Fe0.2O3 perovskite is a possible NOx absorber used for aftertreatment systems upon lean-burn engines with the advantages of the excellent NO oxidation ability, NOx storage capacity and the high sulfur tolerance.

AB - Herein, we reported the NOx storage capacity, NO oxidation ability and sulfur resistance of the La0.7Sr0.3CoO3-based perovskite-type catalysts. NO could be readily oxidized to NO2 with around 83% of NO-to-NO2 conversion at 300°C over the perovskite. After sulfation, the NSC of the La0.7Sr0.3CoO3 catalyst calcined in static air decreased 58.0%. Nevertheless, a significant improvement of the sulfur tolerance could be achieved through partial substitution of Co with Fe cations, as well as calcination in flowing air. The NSC of the pre-sulfated La0.7Sr0.3Co0.8Fe0.2O3 catalyst maintained 360.7μmol/g and dropped only 6.4% as compared with the fresh one. The XPS results confirmed the presence of Fe2(SO4)3 in the sulfated La0.7Sr0.3Co0.8Fe0.2O3 catalyst. The EXAFS results further revealed that the formation of Fe2(SO4)3 in the perovskite inhibited the sulfation of neighboring strontium from the viewpoint of the local atomic level. These findings strongly suggest that the La0.7Sr0.3Co0.8Fe0.2O3 perovskite is a possible NOx absorber used for aftertreatment systems upon lean-burn engines with the advantages of the excellent NO oxidation ability, NOx storage capacity and the high sulfur tolerance.

KW - Carbonates

KW - Fe dopant

KW - NO storage

KW - Perovskite

KW - Sulfur tolerance

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U2 - 10.1016/j.apcatb.2013.06.005

DO - 10.1016/j.apcatb.2013.06.005

M3 - 学術論文

AN - SCOPUS:84885482834

SN - 0926-3373

VL - 146

SP - 24

EP - 34

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

ER -