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In this work, Ni-graphene (Ni-G) composites were prepared on the surface of 304 stainless steel (304 SS) by using a simple, economical and effective electrodeposition technique in a Ni based bath with deposition time from 1 min to 30 min. The effect of graphene for hydrogen evolution reaction (HER) was researched. Graphene content in the Ni-G composite coatings with deposition time of 1 min, 5 min...