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The study introduces novel Co/Cr-decorated carbon nanofibers to be used as an effective counter electrode in the dye-sensitized solar cells. The decorated carbon nanofibers were prepared by a simple technique; electrospinning. Typically, calcination of electrospun nanofibers composed of cobalt acetate, chromium acetate and poly vinyl alcohol in argon atmosphere results in producing carbon nanofibers decorated by CoCr nanoparticles. The crystallinity, purity and morphology of the introduced nanofibers were inspected by scanning electron microscope (SEM), field emission scanning electron microscope (FESEM), transmission electron microscope (TEM), X-ray diffractometer (XRD), TEM mapping and line TEM EDX. These characterization techniques affirmed the formation of good morphology carbon nanofibers decorated by Co/Cr nanoparticles. Cyclic voltammetry technique indicated that the modified carbon …