顶端包裹及表面负载Co的N掺杂碳纳米管的制备及其电催化性能研究
Preparation of Tip-Wrapped and Surface-Loaded Co-Doped N-Doped Carbon Nanotubes and Their Electrocatalytic Properties
摘要: 在非贵金属催化剂中，原子分散在氮共掺杂多孔碳上的3d过渡金属(如Fe、Co、Ni等)催化剂(M-N-C)显示出巨大潜力，其中Co-N-C催化剂因其较低的芬顿反应活性和更高的热力学稳定性，成为研究热点。本研究以N掺杂的氧化石墨烯为基底，通过硼氢化钠还原及管式炉退火煅烧等多个步骤，成功制备出顶端包裹及表面负载Co颗粒的氮掺杂碳纳米管(Co/Co@o-NCNT)双功能电催化剂，具有较高的比表面积。Co/Co@o-NCNT在0.1 M KOH中催化剂Co/Co@o-NCNT-900的半波电位E1/2 = 0.86 V，优于Pt/C (E1/2 = 0.85 V)。在1 M KOH中，该催化剂在10 mA/cm2的电流密度时，OER过电位为317 mV，说明其具有优异的ORR活性和OER活性。
Abstract: Among the non-precious metal catalysts, 3d transition metal (e.g., Fe, Co, Ni, etc.) catalysts (M-N-C) with atoms dispersed on nitrogen co-doped porous carbon show great potential, among which Co-N-C catalysts have become a research hotspot due to their lower Fenton reaction activity and higher thermodynamic stability. In this study, nitrogen-doped carbon nanotubes (Co/Co@o-NCNT) bifunctional electrocatalysts with tip-wrapped and surface-loaded Co particles were successfully prepared from N-doped graphene oxide by reduction with sodium borohydride and annealing and calcination in a tube furnace in several steps. And it has a high specific surface area. The half-wave potential E1/2 of Co/Co@o-NCNT-900 catalyst in 0.1 M KOH is 0.86 V, which is better than that of Pt/C (E1/2 = 0.85 V). In 1 M KOH solution, the catalyst has an OER overpotential of 317 mV at a current density of 10 mA/cm2. It shows that it has excellent ORR activity and OER activity.
文章引用：王湛威, 刘梦冉, 张健, 杜梦琦, 冯家迅, 李波, 孙旭镯. 顶端包裹及表面负载Co的N掺杂碳纳米管的制备及其电催化性能研究[J]. 物理化学进展, 2025, 14(3): 572-582. https://doi.org/10.12677/japc.2025.143054

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