The exploration and development of efficient and low-cost electrocatalysts for the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)are crucial but challenging for addressing the energy crisis and environmental pollution.In this paper,a self-supporting electrode composed of ultrathin ceria and cobalt phosphide nanosheets(CeO2-CoP/NF)was designed and fabricated on a three-dimensional nickel foam substrate.At 10 mA·cm-2,the hydrogen evolution overpotential of CeO2-CoP/NF is 124 mV and 142 mV at 1 mol/L KOH and 0.5 mol/L H2SO4,respectively.In addition,CeO2-CoP/NF can also demonstrate superior OER activity at 100 mA·cm-2,exhibiting an oxygen evolution overpotential of 328 mV in 1 mol/L KOH,and also has superior cycle stability.The experimental results show that the introduction of CeO2 can reduce the erosion of the electrolyte and significantly improve the electrochemical performance of the CoP material.This work provides new insights into the development of high-performance electrocatalysts for water splitting.
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