The construction of bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is significant for developing water splitting technology. The carbon-based non-noble metal catalysts could be regarded as a preferred alternative to Pt-based materials in water splitting, but very rarely Pt-like activity has been obtained by non-noble metal catalysts. Herein, NCQDs/CoMoP/NF bifunctional catalysts were designed and synthesized by the coupling relationships between N-doped carbon quantum dots (NCQDs) and metal ions. The abundant functional groups on the surfaces of CQDs can effectively coordinate with metal ions with empty d orbitals to generate the stable composites. Meanwhile, the formation of metal nanoparticles can be restricted by the introduction of CQDs to form smaller crystals with stable nanostructures, thereby preventing the agglomeration and further growth of metal nanoparticles. The NCQDs-100/CoMoP/NF electrode shows a low overpotential of 65 mV (10 mA cm⁻²) for HER and 370 mV (100 mA cm⁻²) for OER in a 1.0 M KOH system. Furthermore, the constructed NCQDs-100/CoMoP/NF couple can reveal a small cell voltage of 1.75 V to reach the large current density of 50 mA cm⁻².

构建用于析氢反应（HER）和析氧反应（OER）的双功能电催化剂对于发展水分解技术具有重要意义。碳基非贵金属催化剂可被视为水分解中 Pt 基材料的优选替代品，但非贵金属催化剂很少获得类似 Pt 的活性。在此，利用氮掺杂碳量子点 (NCQD) 与金属离子之间的偶联关系，设计合成了 NCQDs/CoMoP/NF 双功能催化剂。CQDs表面丰富的官能团可以有效地与具有空d轨道的金属离子配位生成稳定的复合材料。同时，通过引入CQD可以限制金属纳米粒子的形成，形成具有稳定纳米结构的较小晶体，从而防止金属纳米粒子的团聚和进一步生长。NCQDs-100/CoMoP/NF 电极显示出 65 mV（10 mA cm^-2 ) 对于 HER 和 370 mV (100 mA cm ^-2 ) 对于 1.0 M KOH 系统中的 OER。此外，构建的 NCQDs-100/CoMoP/NF 对可以显示 1.75 V 的小电池电压以达到 50 mA cm ^-2的大电流密度。