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A core-shell and spherical structured Fe3O4@MnO2 nanostructure is designed and developed via a facile and low-cost two-step method. Core-shell structured Fe3O4@MnO2 with uniform morphology can be obtained after layered structured δ-MnO2 is grown on the surface of Fe3O4 nanospheres. The crystal structures and morphology of as-prepared Fe3O4@MnO2 are characterized by scanning electron microscopy, X-ray...
In the oxygen reduction reaction (ORR), the oxygen transport rate plays an important role in the ORR on the cathode. An approach by applying magnetic fields on the cathode can effectively improve the oxygen transport. However, no work reports the effect of the magnetism of ferromagnetic catalysts on ORR under an external magnetic field. Herein, the catalytic performances of the ferromagnetic catalysts...
MnO@C composites with three-dimensional cross-linked structure were designed and fabricated through hydrothermal treatment. Cation exchange resin was used as the precursor to create a three-dimensional cross-linked porous carbon structure, which was evenly decorated by nanosized MnO particles. When compared with pristine MnO, those MnO@C composites showed much better stability during charge-discharge...
C/CuO nanocomposites were prepared by hydrothermal treatment of copper nitrate with starch, followed by H2O2 oxidation and calcination. Structure characterizations show that high crystalline CuO nanoparticles with average size of ca. 40 nm are monodispersed on carbon microspheres. When used as electrode material for supercapacitors, the C/CuO nanocomposite exhibits high specific capacitance of 205 F g...
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