Preparation and oxygen evolution reaction properties of bead-chain FeNi3/Ni3-xS2/C nano-catalysts

In the process of hydrogen production from water splitting in alkaline environment， FeNi-based composites are one of the most promising catalysts to replace noble metals. Using Ni（CH3COO）2 and FeSO4 as raw materials of metal ions， the molar ratio of Ni2+∶Fe2+ was controlled at 3∶1 and the total concentration of metal ions （Fe2++Ni2+） was 0.6 mol/L. FeNi3/Ni3-xS2/C composite nanomaterials were successfully prepared by in situ reaction of the elements of Ni，Fe，S with electrospinning and atmosphere heat treatment at 1000 ℃. The results show that the diameter of the nanoscale bead-chain is about 200 nm， the surface of the bead-chain is fluffy， and the elements of Fe， Ni， S， C are uniformly distributed in the nanoscale bead-chain matrix. The electrochemical analysis shows that the catalyst prepared from the FeNi3/Ni3-xS2/C composite after heat treatment in 1000 ℃ atmosphere exhibites excellent oxygen evolution reaction （OER） properties in 1 mol/L KOH aqueous solution， and the overpotential is 278.59 mV.