IHEP OpenIR
Effects of Fe dopants and residual carbonates on the catalytic activities of the perovskite-type La0.7Sr0.3Co1-xFexO3 NOx storage catalyst
Ma, AJ; Wang, SZ; Liu, C; Xian, H; Ding, Q; Guo, L; Meng, M; Tan, YS; Tsubaki, N; Zhang, J; Zheng, LR; Li, XG;张静; Zheng LR(郑黎荣)
2014
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
EISSN1873-3883
Volume146Pages:24-34
AbstractHerein, 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 degrees 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 360.7 mu mol/g and dropped only 6.4% as compared with the fresh one. The XPS results confirmed the presence of Fe-2(SO4)(3) in the sulfated La0.7Sr0.3Co0.8Fe0.2O3 catalyst. The EXAFS results further revealed that the formation of Fe-2(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 aftertreament systems upon lean-burn engines with the advantages of the excellent NO oxidation ability, NOx storage capacity and the high sulfur tolerance. (C) 2013 Elsevier B.V. All rights reserved.
KeywordPerovskite Fe dopant Carbonates NOx storage Sulfur tolerance
Subject AreaChemistry; Engineering
DOI10.1016/j.apcatb.2013.06.005
Indexed BySCI
Language英语
WOS IDWOS:000327904000004
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/224818
Collection中国科学院高能物理研究所
Recommended Citation
GB/T 7714
Ma, AJ,Wang, SZ,Liu, C,et al. Effects of Fe dopants and residual carbonates on the catalytic activities of the perovskite-type La0.7Sr0.3Co1-xFexO3 NOx storage catalyst[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2014,146:24-34.
APA Ma, AJ.,Wang, SZ.,Liu, C.,Xian, H.,Ding, Q.,...&郑黎荣.(2014).Effects of Fe dopants and residual carbonates on the catalytic activities of the perovskite-type La0.7Sr0.3Co1-xFexO3 NOx storage catalyst.APPLIED CATALYSIS B-ENVIRONMENTAL,146,24-34.
MLA Ma, AJ,et al."Effects of Fe dopants and residual carbonates on the catalytic activities of the perovskite-type La0.7Sr0.3Co1-xFexO3 NOx storage catalyst".APPLIED CATALYSIS B-ENVIRONMENTAL 146(2014):24-34.
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