Cu₃P-Ni₂P Hybrid Hexagonal Nanosheet Arrays for Efficient Hydrogen Evolution Reaction in Alkaline Solution

The development of efficient and low-cost hydrogen evolution reaction electrocatalysts has been regarded as a promising approach to produce sustainable and clean fuels to solve the energy crisis and environmental problems. Herein, 3D hybrid Cu₃P-Ni₂P hexagonal nanosheet arrays are successfully prepared on nickel foam (Cu₃P-Ni₂P/NF). Benefiting from synergistic effects and strong chemical coupling existing at the interface, the Cu₃P-Ni₂P/NF electrode exhibits a low overpotential of 103 mV at a current density of 10 mA cm^-2, which is 47 and 100 mV less than that for Ni₂P/NF and Cu₃P/NF, respectively. It also shows excellent electrochemical durability for long-term reaction in alkaline medium. The excellent electrocatalytic activity makes the Cu₃P-Ni₂P/NF as a promising cathode toward efficient hydrogen evolution via electrochemical water splitting.