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.
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