Here, N- and P-doped carbon–carbon nanotube CoP (NPC-CNTs-CoP) nanoparticles dodecahedra are achieved by multistep calcination of the Zn-doped zeolitic imidazolate framework ZIF-67 precursor (ZnCo-ZIF). In the structures, the presence of N and P atoms, abundant CNTs and the CoP nanoparticles can enhance electrochemical activity and promote the structural stability of materials. As the temperature increases, the Zn contents gradually reduce to zero, which provides more active sites for electrochemical testing. Furthermore, the high specific surface area and microporous behavior of NPC-CNTs-CoP-9 make it excellent in electrocatalytic testing. NPC-CNTs-CoP-9 shows a low overpotential of 224 mV at 10 mA·cm −2 in 1.0 mol·L −1 KOH solution. The strategy of zeolitic imidazole framework-derived transition metal phosphides will provide a new sight for developing energy conversion materials.

中文翻译：

---

氮、磷掺杂的碳-碳纳米管 CoP 十二面体通过控制锌含量实现高性能电催化析氧

在这里，N 和 P 掺杂的碳-碳纳米管 CoP (NPC-CNTs-CoP) 纳米粒子十二面体是通过多步煅烧 Zn 掺杂的沸石咪唑酯骨架 ZIF-67 前体 (ZnCo-ZIF) 来实现的。在结构中，N和P原子的存在、丰富的碳纳米管和CoP纳米颗粒可以增强电化学活性并促进材料的结构稳定性。随着温度升高，Zn含量逐渐降低至零，这为电化学测试提供了更多的活性位点。此外，NPC-CNTs-CoP-9 的高比表面积和微孔行为使其在电催化测试中表现出色。NPC-CNTs-CoP-9 在 1.0 mol·L -1 KOH 溶液中在 10 mA·cm -2 下显示出 224 mV 的低过电位。