Abstract
Co 3O 4–RuO 2 composite nanofibers (NFs) were synthesized by an electrospinning method and were calcinated at 400°C for 1 hr in air. Scanning electron microscopy and high-resolution transmission electron microscopy (HRTEM) examinations show that all the synthesized NFs have uniform surface morphology and their diameters are in the range of ~ 30–~70 nm. X-ray diffraction (XRD) results show that crystalline Co 3O 4 phase and RuO 2 phase coexist in the composite NF matrix which is confirmed by X-ray photoemission spectroscopy. In addition, the HRTEM energy-dispersive X-ray spectroscopy mapping results show that the Co 3O 4 and RuO 2 phases are uniformly distributed across the NF matrix.
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