Enhanced catalytic activity of toluene oxidation over in-situ prepared Mn3O4-Fe2O3 with acid-etching treatment

Juexiu Li; Ruiqin Zhang; Yue Liu; Tonghua Sun; Jinping Jia; Mingming Guo

Catalysis Communications (Jan 2023)

Enhanced catalytic activity of toluene oxidation over in-situ prepared Mn3O4-Fe2O3 with acid-etching treatment

Juexiu Li,
Ruiqin Zhang,
Yue Liu,
Tonghua Sun,
Jinping Jia,
Mingming Guo

Affiliations

Juexiu Li: School of Energy and Environment, Zhongyuan University of Technology, 41 Zhongyuan Rd. (M), Zhengzhou, 450007, PR China; College of Chemistry, Zhengzhou University, No.100 Science Avenue, Zhengzhou 450001, China; Corresponding author at: School of Energy and Environment, Zhongyuan University of Technology, 41 Zhongyuan Rd. (M), Zhengzhou, 450007, PR China.
Ruiqin Zhang: College of Chemistry, Zhengzhou University, No.100 Science Avenue, Zhengzhou 450001, China; School of Ecology & Environment, Zhengzhou University, No.100 Science Avenue, Zhengzhou 450001, China
Yue Liu: School of Energy and Environment, Zhongyuan University of Technology, 41 Zhongyuan Rd. (M), Zhengzhou, 450007, PR China
Tonghua Sun: School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai 200240, PR China
Jinping Jia: School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai 200240, PR China
Mingming Guo: School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai 200240, PR China; Chongqing Research Institute of Shanghai Jiao Tong University, Chongqing 401120, PR China; Corresponding author.

Journal volume & issue: Vol. 174
p. 106581

Abstract

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Mn3O4-Fe2O3 composite catalysts are in-situ synthesized via advanced oxidation followed by modifying with hydrochloric acid to improve the catalytic toluene oxidation performance. Mn3O4-Fe2O3 modified with 1.0 M HCl (A-1.0) exhibited best activity of toluene oxidation. The temperature of 50% toluene conversion is 245 °C and the temperature of 90% conversion is 279 °C. There are much more abundant surface lattice oxygen species and higher amount of high valence manganese and iron ions on A-1.0 catalyst, which are beneficial for improving catalytic activity. In-situ DRIFTs indicated that benzaldehyde and benzoic acid are main intermediate products on A-1.0 catalyst during toluene oxidation.

Published in Catalysis Communications

ISSN: 1566-7367 (Print); 1873-3905 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Chemistry
Website: https://www.journals.elsevier.com/catalysis-communications

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