In this study, Co₂P/CoP hybrid nanoparticles (NPs) imbedded on the surface of core–shell metal–organic frameworks (MOFs) derived three-dimensional N, P co-doped graphitized carbon (Co₂P/CoP@NPGC) are prepared via direct pyrolysis of P-containing MOF precursors. P dopant dosage is tailored to adjust active sites and crystalline phases of Co₂P/CoP@NPGC. The active Co₂P and CoP NPs and the synergistic effect from the Co-Nx/C and Co-P/C active sites and porous NPGC make the dominant contributions to the ORR/OER. For ORR, the half-wave potential of Co₂P/CoP@NPGC-1 is 0.93 V, which is superior to that of Pt/C (E_1/2 = 0.875 V). As for OER, Co₂P/CoP@NPGC-1 displays a lower overpotential (ƞ = 340 mV) compared to RuO₂ (ƞ = 380 mV, at 10 mA cm⁻²). The Co₂P@CoOOH heterojunction guarantees intrinsic conductivity. Furthermore, doping with N and P can modify the surface electronic structure of catalyst to lower the energy of oxygen adsorption and dissociation, which are beneficial to enhance the ORR and OER activity. Additionally, its bifunctional activity parameter (ΔE) for ORR and OER is only 0.64 V, which is lower than that of Pt/C and RuO₂ (0.76 V). Therefore, this work proposes a new sight into constructing a competitive core–shell MOFs derived electrocatalyst for ORR/OER.

在本研究中，Co ₂ P/CoP 杂化纳米粒子 (NPs) 嵌入核壳金属有机框架 (MOFs) 的表面，衍生出三维 N、P 共掺杂石墨化碳 (Co ₂ P/CoP@NPGC)通过含磷 MOF 前体的直接热解制备。P 掺杂剂的剂量是为了调整 Co ₂ P/CoP@NPGC 的活性位点和晶相而设计的。活性 Co ₂ P 和 CoP NPs 以及 Co-Nx/C 和 Co-P/C 活性位点和多孔 NPGC 的协同效应对 ORR/OER 做出了主要贡献。_{对于ORR，Co 2} P/CoP@NPGC-1的半波电位为0.93 V，优于Pt/C（E _1/2 = 0.875 V）。至于 OER，Co _{2与 RuO 2} (ƞ = 380 mV, at 10 mA cm ^-2 )相比，P/CoP@NPGC-1 显示出较低的过电位 (ƞ = 340 mV )。Co ₂ P@CoOOH 异质结保证了本征导电性。此外，N和P的掺杂可以改变催化剂的表面电子结构，降低氧的吸附和解离能，有利于提高ORR和OER活性。此外，其ORR和OER的双功能活性参数(ΔE)仅为0.64 V，低于Pt/C和RuO ₂ (0.76 V)。因此，这项工作为构建具有竞争力的核壳 MOFs 衍生的 ORR/OER 电催化剂提供了新的视角。