Triiodide reduction (IRR) and hydrogen evolution reaction (HER) are critical chemical processes in dye-sensitized solar cells (DSSCs) and water splitting,respectively,and their reaction rates will greatly affect the photovoltaic performance and hydrogen production efficiency.The counter electrode (CE) and the cathode are an important component to catalyze IRR in DSSCs and HER in water-splitting devices,respectively.In this work,a bimetal Cu/Ni-Nx active sites co-modified Cu/Ni-N-C CE catalyst is prepared through modifying ZIF-derived porous carbon and used as the CE/cathode for catalyzing IRR and HER,respectively.Thanks to the high specific surface area,the introduction of bimetallic-Nx (Ni/Cu-Nx) activity sites by doping metal ions,as well as the synergistic effect between different metal heteroatoms,the Cu/Ni-N-C exhibits enhanced catalytic activity.As a result,the DSSC based on Cu/Ni-N-C CE yields a power conversion efficiency (PCE) of 7.62%,exceeding that of Pt CE (7.29%).In addition,the Cu/Ni-N-C exhibits outstanding electrocatalytic activity for driving HER with a low overpotential of 153.8 mV at 10 mA cm-2,which is close to that of Pt/C (47.8 mV).Further,the catalytic mechanism of Cu/Ni-N-C catalyst for IRR and HER is unveiled by DFT calculations.This work provides an effective and versatile strategy of metal coordinated ZIF-derived carbon for preparing superior catalysts in new energy fields.