摘要：The exploration of stable and highly efficient alkaline hydrogen evolution reaction(HER)electrocatalysts is imperative for alkaline water ***,se-doped nicop with hierarchical nanoarray structures directly grown on carbon cloth(se-nicop/CC)was prepared by hydrothermal reaction and phosphorization/selenization *** experimental results reveal that se doping could increase the electrochemical active sites and alter the electronic structure of *** optimized se-nicop/CC electrode exhibits outstanding HER activity in alkaline electrolyte,which only needs a low overpotential of 79 mV at the current density of 10 mA/cm^(2).When serving as anode and cathode electrode simultaneously,the se-nicop/CC electrodes achieve current density of 50 mA/cm^(2) at a low voltage of only 1.62 *** work provides a feasible way to rationally design high active HER electrocatalysts.