The development of low-cost, environmental friendliness, outstanding catalytic activity, superior conductivity and good stability counter electrode (CE) catalyst in dye-sensitized solar cells (DSSCs) is important to promote the commercial application of DSSCs. Here, WN/nitrogen-doped reduced graphite oxide hybrids (WN/NrGO) had been synthesized by hydrothermal method followed by nitridation treatment, which used as CE catalysts for catalyzing I₃⁻ to I⁻. The combined WN and nitrogen-doped reduced graphite oxide (NrGO) into WN/NrGO could effectively regulate the catalytic activity for the reduction of I₃⁻, accelerate the charge transfer at the interface, and then the synergistic effect between of them can be fully achieved. When the WN/NrGO served as the CE catalyst in DSSCs, the photoelectric conversion efficiency (PCE) of 7.42% has been obtained, compared to the conventional Pt-based DSSCs (7.71%). Meanwhile, as-prepared WN/NrGO exhibited higher PCE than that of the solo WN (6.19%) and NrGO (5.81%) in parallel. A series of electrochemical measures revealed that the WN/NrGO displayed the higher catalytic activity and charge transfer ability than that of the solo WN and NrGO, so the synthesized low-cost WN/NrGO have an potential to be used as the effectively CE catalysts for the replacement of the noble Pt.

染料敏化太阳能电池（DSSC）中低成本，环境友好，出色的催化活性，优异的电导率和良好稳定性的对电极（CE）催化剂的开发对于促进DSSC的商业应用至关重要。这里，WN /氮掺杂的还原的氧化石墨杂种（WN / NrGO）已通过水热方法，接着氮化处理，其用作CE催化剂用于催化合成我₃ ^-至我^- 。将合并的WN和掺氮还原的氧化石墨（NrGO）到WN / NrGO能有效调节催化活性的还原我₃ ^-，加速了界面上的电荷转移，从而可以充分实现它们之间的协同作用。当WN / NrGO用作DSSC中的CE催化剂时，与传统的基于Pt的DSSC（7.71％）相比，获得7.42％的光电转换效率（PCE）。同时，准备好的WN / NrGO的PCE高于并行的WN / NrGO（6.19％）和NrGO（5.81％）。一系列电化学手段表明，WN / NrGO具有比单独的WN和NrGO更高的催化活性和电荷转移能力，因此合成的低成本WN / NrGO有潜力用作有效的CE催化剂。贵族铂的替代。