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, Chak Tong AU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

75 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)2618-2623
Number of pages6
JournalEnvironmental Science & Technology
Volume44
Issue number7
DOIs
Publication statusPublished - 1 Apr 2010

Scopus Subject Areas

  • Chemistry(all)
  • Environmental Chemistry

Fingerprint

Dive into the research topics of 'Hydrothermal Fabrication and Catalytic Properties of la <sub>1-x</sub>Sr<sub>x</sub>M<sub>1-y</sub>Fe<sub>y</sub>O<sub>3</sub> (M = Mn, Co) That Are Highly Active for the Removal of Toluene'. Together they form a unique fingerprint.

Cite this