Hydrogen evolution reaction (HER) through electrocatalysis using cost-efficient and long-term stable bimetallic phosphide as electrocatalyst holds a great promise for sustainable clean energy technologies.In this study,self-supported nanoporous Ni-Co-P (np-Ni-Co-P) catalyst with amorphous structure was synthesized by utilizing a facile electrochemical dealloying strategy.The results showed that due to the nanoporous structure,disorder atomic arrangement and alloying effect,the np-Ni-Co-P exhibited outstanding electrocatalytic performance for HER with low overpotential of 114 mV at a current density of 10 mA cm-2,small Tafel slope (57.3 mV dec-1) and good long-term durability in 1 M KOH.The synergetic effect of Ni and Co elements improves the intrinsic activity of the active sites.This research provides a direction for the exploration of bimetallic phosphides toward HER in the water splitting process.