Abstract
Abstract Zinc Oxide (ZnO) nanorods were prepared by facile and inexpensive chemical route at low temperature. X-ray diffraction study confirms the formation of hexagonal wurtzite crystal structure with high orientation along the c-axis. FE-SEM images show a vertical alignment of ZnO nanorods to the substrate surface, whose average diameter and length is 1.33 and 15 μm, respectively. Electrochemical performance and photo-electrochemical water splitting of ZnO nanorods are investigated in 1 M Na 2 SO 4 electrolyte using the different electrochemical techniques. Electrochemical study of ZnO nanorods exhibits the maximum areal capacitance of 29.36 mFcm −2 in the negative potential window, which is higher than the areal capacitance of 10.84 mFcm −2 in the positive potential window at the scan rate of 5 mVs −1 . ZnO nanorods show the excellent stability of 97% over the 3000 cycles in both potential windows. Photo-electrochemical water splitting demonstrates the fast photo-response with 0.098% photo-conversion efficiency.
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