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Issue 47, 2016
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Rational design of MnO2@MnO2 hierarchical nanomaterials and their catalytic activities

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Abstract

Hierarchically structured materials have special properties and possess potential in applications in the catalytic and electrochemical fields. Herein, two kinds of hierarchical core–shell nanostructures, lavender-like α-MnO2@α-MnO2 and balsam pear-like α-MnO2@γ-MnO2, were prepared by a facile room-temperature method using α-MnO2 nanowires as a backbone under acidic and alkaline conditions, respectively. When being used as a catalyst for dimethyl ether combustion, α-MnO2@γ-MnO2 exhibited a better performance than α-MnO2@α-MnO2 (T10 = 171 vs. 196 °C; T90 = 220 vs. 258 °C, SV = 30, 000 mL g−1 h−1). It is concluded that the larger surface area, higher reducibility/oxygen mobility, richer surface oxygen species, and the relatively smaller apparent activation energy are responsible for the superior performance of α-MnO2@γ-MnO2.

Graphical abstract: Rational design of MnO2@MnO2 hierarchical nanomaterials and their catalytic activities

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Publication details

The article was received on 09 Sep 2016, accepted on 12 Oct 2016 and first published on 13 Oct 2016


Article type: Paper
DOI: 10.1039/C6DT03523J
Citation: Dalton Trans., 2016,45, 18851-18858
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    Rational design of MnO2@MnO2 hierarchical nanomaterials and their catalytic activities

    B. Zhang, G. Cheng, W. Ye, X. Zheng, H. Liu, M. Sun, L. Yu, Y. Zheng and X. Cheng, Dalton Trans., 2016, 45, 18851
    DOI: 10.1039/C6DT03523J

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