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… Click to show full 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.
               
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