The development of cheaper non-noble metal electrocatalysts for hydrogen evolution reaction (HER) that can withstand in acidic environment is one attractive route for renewable energy applications. The 3D graphene oxide on nickel skeleton has been recently developed as electrocatalyst in acid solution since it is less expensive than existing noble metal-based catalysts and yet exhibits promising potential for efficient reaction between molecules such as H₂O, H₂, NH₃, O₂ etc. In this work, the 3D graphene oxide was synthesized as a thin film coated on Ni foam substrate by the CVD method using methanol and water as a carbon precursor and a weak oxidizing agent, respectively. The influence of oxidation level of 3D graphene oxide to the overpotential, Tafel slope, and band gap energy was investigated in 0.5 M H₂SO₄ solution. It was found that 3D graphene oxide can improve electrocatalytic property of Ni by the oxygen-functional groups, which can act as an alternative path for H₂ production by the recombination of the spilled H_ads from Ni. This novel 3D graphene oxide/ nickel foam may be a good electrocatalyst for practically producing H₂ fuel.