Efficient Hydrogen Production by In Situ Growth of sp‐C–P‐Cu Heterointerface

Abstract Herein, the construction of sp‐C–P‐Cu bridged graphdiyne (GDY)‐copper phosphides (Cu x P) heterointerface structure is described by controlled growth of GDY on the surface of Cu x P for efficient hydrogen evolution reaction (HER). The experimental results demonstrate that the newly formed sp‐C─P bonds at the interfaces between GDY and Cu x P have the dual roles of promoting faster charge transfer and producing large numbers of new intrinsic active sites, which facilitates the activation and dissociation of H 2 O to produce H 2 and greatly enhanced the intrinsic electrocatalytic activity. As expected, the as‐synthesized electrocatalyst exhibits excellent activity for hydrogen evolution reaction (HER) with overpotentials of 44 mV at 10 mA cm −2 , which is smaller than that of pure Cu x P and Cu foam electrocatalysts. These results correlate interface structure and HER activity and provide new insights into the design and synthesis of high‐performance electrocatalysts.