Large-scale synthesis of hierarchical MnO2 for benzene catalytic oxidation--颗粒学报PARTICUOLOGY

Li, D., Shen, G., Tang, W., Liu, H., & Chen, Y. (2014). Large-scale synthesis of hierarchical MnO2 for benzene catalytic oxidation. Particuology, 14, 71–75. https://doi.org/10.1016/j.partic.2013.06.010

Large-scale synthesis of hierarchical MnO₂ for benzene catalytic oxidation

Dongyan Li ^{a b}, Genli Shen ^{a b}, Wenxiang Tang ^{a b}, Haidi Liu ^a, Yunfa Chen ^a *

a State Key Laboratory of Multi-phase Complex System, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
b University of Chinese Academy of Sciences, Beijing 100049, China

10.1016/j.partic.2013.06.010

Volume 14, June 2014, Pages 71-75

Received 21 March 2013, Revised 27 May 2013, Accepted 15 June 2013, Available online 17 September 2013.

E-mail: yfchen@mail.ipe.ac.cn

Highlights

• Hierarchical urchin-shaped MnO₂ microspheres were obtained by a facile approach.

• The MnO₂ microspheres with high surface area could be obtained in large-scale.

• The MnO₂ microspheres exhibited good catalytic activity and stability.

Abstract

Hierarchical sea-urchin-shaped manganese oxide microspheres were synthesized via a facile method based on the reaction between KMnO₄ and MnSO₄ in HNO₃ solution at 50 °C. The average diameter of the microspheres is ∼850 nm. The microspheres consist of a core of diameter of ∼800 nm and nanorods of width ∼50 nm. The nanorods exist at the edge of the core. The Brunauer–Emmett–Teller surface area of the sea-urchin-shaped microspheres is 259.4 m²/g. A possible formation mechanism of the hierarchical sea-urchin-shaped microspheres is proposed. The temperature for 90% conversion of benzene (T_90%) on the hierarchical urchin-shaped MnO₂ microspheres is about 218 °C.

Graphical abstract

Keywords

Manganese oxide; Hierarchical; Catalyst; Benzene

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