Abstract
The electrodes with different morphological NiOOH layer on Nickel Foam (NF) have been prepared through a facile method. Firstly, the nickel chloride salt-urea-solvent (H2O、glycerol/H2O and ethylene glycol/H2O) systems were applied to adjust the morphology of Ni(OH)2 on NF. The SEM results showed that the nanoplates and interspaces of deposited Ni(OH)2 were regulated by adding organic solvent to influence the self-assembly process of Ni(OH)2. Further upon anodizing Ni(OH)2/NF samples, NiOOH/NF electrodes were obtained accordingly and utilized for the oxygen evolution reaction (OER). Based on electrochemical active surface area (EASA), the best activity toward OER was obtained on the electrode NiOOH/NF-30glycerol-8 with the current density of 0.20 mA/cm2 @1.72 V vs. RHE. The evaluations of electrochemical active surface area for NiOOH/NF electrodes indicate that the increased active sites are attributed to the best OER efficiency on NiOOH/NF-30glycerol-8.
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