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Controllable synthesis 3D hierarchical structured MnO2@NiCo2O4 and its morphology-dependent activity

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Abstract

The hierarchical structures with controlled size, shape, and interface are extremely attractive for their collective properties and synergetic effect. Herein, we report the α-MnO2@NiCo2O4 heterostructures with the nanowire and nanosheet morphology prepared via hydrothermal reaction and a post-calcination treatment. The ultralong α-MnO2 was used as a seed for the Ni–Co precipitant growth and self-assembly. The morphology of the Ni–Co precipitant was tailored using a solvent (water/methanol). After calcination, the shape of the precursor was maintained by α-MnO2@NiCo2O4. α-MnO2@NiCo2O4 demonstrates a morphology-dependent performance towards the catalytic combustion of dimethyl ether and the nanosheet-like α-MnO2@NiCo2O4 exhibits a better performance than that of the nanowire-like counterpart. The catalytic activity is related to the reducibility, surface oxygen species, and the apparent activation energy.

Graphical abstract: Controllable synthesis 3D hierarchical structured MnO2@NiCo2O4 and its morphology-dependent activity

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Publication details

The article was received on 15 Oct 2017, accepted on 23 Nov 2017 and first published on 27 Nov 2017


Article type: Research Article
DOI: 10.1039/C7QI00637C
Citation: Inorg. Chem. Front., 2018, Advance Article
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    Controllable synthesis 3D hierarchical structured MnO2@NiCo2O4 and its morphology-dependent activity

    M. Sun, B. Zhang, G. Cheng, H. Yu, F. Ye, J. Zhou, L. Yu and W. Song, Inorg. Chem. Front., 2018, Advance Article , DOI: 10.1039/C7QI00637C

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