Abstract: CoP and CoCuP electrodes are prepared through potentiodynamic deposition method with copper foil as substrates.CoCuP electrode exhibits an excellent activity toward oxidation of water in 1 M KOH with an overpotential of only 238 mV at a current density of 10 mA·cm-2,which is significantly better than CoP electrode.Systematic research shows that Cu doping into Co-P can adjust the surface morphology of the electrode.CoCuP forms a unique nano-sheet stacking structure with a higher electrochemically active surface area compared with CoP.In addition,CoCuP exhibits pH-dependent OER activity relative to RHE,indicating that the lattice oxygens participate in the OER reaction as active sites,which enhances the OER activity of the catalyst.
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