Electrocatalytic performance of urea regulated nanoporous alloy NiFeCoMgCN
The preparation of efficient and stable oxygen evolution reaction(OER)electrocatalysts is the key to industrial hydrogen production.Using urea as a pore forming agent and active C/N source,a nanoporous alloy NiFeCoMgCN was prepared through high-temperature sintering based on the nanoscale Kokendall effect,and its electrocatalytic performance as a electrode was analyzed.The results show that in 1 M KOH solution,the NiFeCoMgCN electrode has an overpotential of 199 mV and a Tafel slope of 41.7 mV·dec-1 at 10 mA·cm-2,which is superior to the IrO2/Ni foam electrode(with an overpotential of 215 mV and a Tafel slope of 76.3 mV·dec-1 at 10 mA·cm-2),and can operate continuously for at least 100 h at a high current density of 1 A·cm-2.The excellent catalytic activity of the NiFeCoMgCN electrode is attributed to its continuous nanoporous structure and improved intrinsic activity.
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