The moderate N₂ photofixation catalyzed by CeO₂-based materials has been attracted much attention. Herein, double quantum dots of carbon and Co(OH)₂ doped layer structure CeCO₃OH are demonstrated firstly, in which double quantum dots can provide much more reaction active sites and improve the energy band structures. The double quantum dots decorated catalyst represents the better performances for the N₂ fixation than the single quantum dots. NH₃ fixation rate of the co-doped catalyst can reach above 1.1 mmol·g_cal⁻¹·h⁻¹ and 0.65 mmol·g_cal⁻¹·h⁻¹ with full spectrum and visible light irradiation, respectively. The apparent quantum efficiency at 380 nm has achieved to about 1%. This research affords a fabrication strategy to develop noble metal-free photocatalysts by introducing the composite quantum dots on the samples.

CeO ₂基材料催化的适度N ₂光固定引起了人们的广泛关注。在此，首先展示了碳和Co(OH) ₂掺杂层结构CeCO ₃ OH的双量子点，其中双量子点可以提供更多的反应活性位点并改善能带结构。双量子点修饰的催化剂代表了比单量子点更好的N ₂固定性能。共掺杂催化剂的NH ₃固定率可达1.1 mmol·g _cal ^-1 ·h ^-1和0.65 mmol·g _cal ^-1 ·h ^-1以上 分别用全光谱和可见光照射。380 nm 处的表观量子效率已达到约 1%。该研究通过在样品上引入复合量子 点提供了一种开发无贵金属光催化剂的制造策略。