The nitrogen-decorated CeO2/reduced graphene oxide nanocomposite (CeO2/N-rGO) was one-step synthesized by a facile hydrothermal technique and applied as counter electrode materials for dye-sensitized solar cells (DSSCs). For comparison, CeO2/rGO and rGO were also synthesized by adjusting corresponding reactants. It was found that the as-synthesized CeO2/N-rGO shows better electrocatalytic activity for triiodide/iodide reduction than that of pure rGO and CeO2/rGO, and a synergistic effect of nitrogen and CeO2 on the rGO sheets was observed. The photoelectric conversion efficiency of DSSCs based on CeO2/N-rGO counter electrode was 3.20%, which is higher than that of CeO2/rGO (2.45%) and rGO counter electrode (1.37%). Furthermore, the synergistic effect of nitrogen and CeO2 on the rGO sheets was also discussed in detail with different CeO2 amount levels. It is believed that this one-step synthetic method is a potential way to synthesize low-cost and efficient rGO-based multiple composited counter electrode materials to replace more expensive Pt.

通过简便的水热技术一步合成了氮修饰的CeO 2 /还原氧化石墨烯纳米复合材料（CeO 2 / N-rGO），并用作染料敏化太阳能电池（DSSC）的对电极材料。为了比较，还通过调节相应的反应物来合成CeO 2 / rGO和rGO。结果发现，与纯rGO和CeO 2 / rGO相比，合成后的CeO 2 / N-rGO对三碘化物/碘化物的还原具有更好的电催化活性，并且在rGO片上观察到了氮和CeO 2的协同作用。基于CeO 2的DSSC的光电转换效率。/ N-rGO对电极为3.20％，高于CeO 2 / rGO（2.45％）和rGO对电极（1.37％）。此外，在不同的CeO 2含量水平下，还详细讨论了氮和CeO 2对rGO片材的协同作用。相信这种一步合成方法是合成低成本和高效的基于rGO的多种复合对电极材料以替代更昂贵的Pt的潜在方法。