Fe-doped NiCo2O4 hollow hierarchical sphere as an efficient electrocatalyst for oxygen evolution rea

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We prepared porous Fe-doped nickel cobaltate(Fe-NiCo2O4)hollow hierarchical nanospheres through a facile self-templated synthetic strategy.Due to the porous hollow structure and composition,the Fe-NiCo2O4 presented vastly superior electrocatalytic activity for the oxygen evolution reaction(OER),compared with NiCo2O4 and the majority of other OER catalysts.With an aim of stimulating a current density of 10 mA·cm-2,the Fe-NiCo2O4 catalyst needs an overpotential of 210 mV,which is on a par with the general properties of commercial IrO2.In addition,the Fe-NiCo2O4 catalyst performed stably in long-term testing.The excellent activity and long-term stability showed that such catalysts have great promise for widespread application in the field of water splitting.
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