A unique nanoarray with NiFe LDH as core and W-Ni2P as shell is formed by in-situ growth of W-doped Ni2P nanosheets supported by NiFe LDH micron-scale pellets as skeleton.Morphology,structure and electrochemical properties of W-Ni2P@NiFe LDH/NF are analyzed by means of SEM,XRD and electrochemical catalytic performance test.The results show that the unique three-dimensional spherical nanostructures of W-Ni2P@NiFe LDH/NF accelerate the charge transfer rate,provide abundant active sites,and generate synergistic effects between W-Ni2P and NiFe LDH,thus improving the electrocatalytic performance and durability in oxygen evolution reaction(OER).Compared with Ni2 P or NiFe LDH alone,spheroidal W-Ni2P@NiFe LDH/NF exhibits excellent OER properties,delivering an overpotential of 251 mV at a current density of 40 mA·cm-2.Its Tafel slope is only 52 mV·dec-1,and its electrochemical impedance is the minimum.Its Cdl value is 3.51 mF·cm-2,and can maintain the current density at 23 mA·cm-2 for more than 10 hours without obvious downward trend.
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