Abstract
Hydrogen which is a renewable and sustainable form of energy to replace fossil fuels has been has been attracted great interest because of clean emission and high conversion efficiencies. To make water electrolyzer more profitable and economical, the selection of electrodes having low overpotentials, low- cost and stable with well electrocatalytic activity is required. In this study, CuO nanostructures were fabricated by chemical techniques. The morphologies and structures of CuO nanostructures were studied in detail by FE-SEM, BET, and XRD. Three different morphologies of CuO (Nanorod, nanoflake and nano-flower nanostructures) were synthesized. The contact angle measurements were carried out to state the surface properties of the synthesized materials. The cathodic polarization, open circuit potential-time measurements, impedance measurements and Mott-Schottky analysis were carried out in 1M KOH solution to determine the electrocatalytic performance of electrodes in hydrogen formation reaction. Besides, energy consumption efficiencies of electrodes for alkaline electrolysis were investigated.
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