Realizing the simultaneous morphology and electrical conductivity tuning of non-noble metal nanocatalysts is urgently desired for promoting their intrinsic activity toward oxygen evolution reaction (OER), while it is still challenging. Herein, we have demonstrated that the morphology and conductivity of FeNi₃ alloy can be finely tailored via introducing the graphene carbon dots (GCDs). Benefitting from the enlarged active areas, significantly improved electrical conductivity, and strong synergistic coupling effect, the optimized FeNi₃@GCDs-10 shows extraordinary electrocatalytic performance towards OER by delivering a current density of 10 mA cm⁻² with the overpotential of 238 mV, as well as small Tafel slope of 48.7 mV dec^-1. Density functional theory (DFT) calculations reveal that Fe is the dominated active sites for boosting water dissociation. In addition, the incorporation of GCDs can also strength the adsorption of *O and lower the energy barrier for the transformation from *OH to *O, thereby optimizing the free energy of *O and greatly promoting the OER activity.

迫切需要实现非贵金属纳米催化剂的同时形貌和电导率调节，以促进其对析氧反应（OER）的内在活性，但仍然具有挑战性。在此，我们证明了通过引入石墨烯碳点 (GCD) 可以精细调整FeNi _{3合金的形貌和导电性。}得益于扩大的活性区域、显着提高的电导率和强大的协同耦合效应，优化后的 FeNi ₃ @GCDs-10 通过提供 10 mA cm ^-2的电流密度和 238 mV 的过电位显示出对 OER 的非凡电催化性能，以及 48.7 mV dec ^{-1的小 Tafel 斜率}. 密度泛函理论 (DFT) 计算表明，Fe 是促进水分解的主要活性位点。此外，GCDs的掺入还可以增强*O的吸附，降低*OH向*O转化的能垒，从而优化*O的自由能，大大促进OER活性。