To solve the existing energy crisis and achieve continuous seawater electrolysis,it is necessary to design efficient electrocatalysts to deal with the problems of slow anodic oxygen evolution and chloride ion(Cl-)corrosion.In this study,a unique nanostructural modified Ce-FeHPi/NF electrode was prepared by a one-step hydrothermal method on a nickel foam(NF)skeleton.The experimental results show that Ce doping regulates the surface morphology of FeHPi/NF,forming amorphous nanospheres,which not only enables the catalytic layer to grow into a compact nanostructure,but also greatly increases the active surface area of the electrode,significantly improving the electrocatalytic activity.In addition,the presence of phosphoric acid group can effectively repel Cl-on surface of the electrode,which enhances its corrosion resistance,and stabilizes it in seawater for a long time.The 10％Ce-FeHPi/NF electrode in alkaline simulated seawater(1 mol·L-1 KOH+0.5 mol·L-1 NaCl)electrolyte requires only a low overpotential of 296 mV to reach a current density of 100 mA·cm2.In 1 mol·L-1 KOH+1 molL-1 NaCl,the 10％Ce-FeHPi/NF electrode runs stably for more than 130 h at a constant potential of 1.774 V(vs.RHE).Therefore,the modified nanostructured material prepared in this study can effectively improve the oxygen evolution activity of electrodes,and provide a new way for the development of seawater electrolytic anode catalytic materials.
维普
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