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Foam-like Electroplated Ni-W/graphene Oxide Composite Coating with High Porous Surface: An Efficient Electrocatalyst for the Hydrogen Evolution Reaction
Mohammad Derakhshani , Saeed Rastegari , Ali Ghaffarinejad
Abstract:   (143 Views)
In this research, the morphology of the Ni-W coating was modified by adding graphene oxide (GO) nanosheets in such a way that a foam-like structure with high porosity and holes in the form of intertwined tunnels was obtained. Different amounts of GO nanosheets were added to the plating bath and the resulting coating was examined. In order to estimate the electrochemically active surface area, the cyclic voltammetry (CV) test was used. Moreover, the linear polarization test (LSV) and chronoamperometry in 1 M NaOH were conducted to investigate the electrocatalytic activity for the hydrogen evolution reaction (HER). It was found that by adding 0.4 g/L GO to the electroplating bath, the electrocatalytic properties are doubled and the active surface of the electrode is significantly increased.
 
Keywords: Alkaline water splitting, Composite coating, Hydrogen Evolution Reaction, Electrochemically active surface area, Renewable energy
Full-Text [DOCX 2249 kb]   (29 Downloads)    
Type of Study: Research Paper | Subject: Influence of processing and post-processing on microstructure and mechanical properties
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