Abstract
Recently, nickel-cobalt/graphene-based hybrid electrocatalysts have gained significant attention for their use in hydrogen evolution reactions (HER). In this study, we report a facile electrochemical synthesis route for cobalt (Co) and nickel (Ni) doped/anchored graphene-like carbon fiber electrocatalysts, achieved in a single step using Yucel's method. The spectroscopic, morphological, and crystallographic structures of the Ni-Co alloys were analyzed in solutions containing various molar ratios of Ni:Co. The Ni-Co doped/anchored graphene-like carbon fiber electrocatalysts exhibited significantly enhanced electrocatalytic activity for HER compared to single metallic doped Ni and Co electrocatalysts. Notably, the Ni-Co@GrF2 electrocatalyst demonstrated the smallest Tafel slope 42 mV dec-1, which is comparable to the electrocatalytic activity of platinum..