论文成果
Facile synthesis of defect-rich Fe-N-C hybrid from fullerene/ferrotetraphenylporphyrin as efficient oxygen reduction electrocatalyst for Zn-air battery
- 发布时间：2023-10-19
- 点击次数：
- 关键字：CARBON NANOFIBERS; CATALYST; NANOPARTICLES; PYROLYSIS; NANOTUBES; SITES
- 摘要：Exploring remarkable oxygen reduction reaction (ORR) electrocatalysts for regenerative fuel cells and metal-air batteries is highly essential. Herein, a novel non-noble metal-based heterogeneous electrocat-alyst with rich defects were successfully synthesized by liquid-liquid interfacial precipitation (LLIP) of fullerene (C 60 ) and ferrotetraphenylporphyrin (FeTPP) followed by one step pyrolysis. The obtained prod-uct annealed at 700 degrees C (C60/FeTPP-700), when employed as ORR electrocatalyst, revealed a positive half -wave potential (E 1/2 ) of 0.877 V vs . reversible hydrogen electrode (RHE), which was superior to that of the commercial 25% Pt/C. Delightfully, the assembled Zn-air battery (ZAB) using C60/FeTPP-70 0 as an air-electrode catalyst exhibited a high power density of 153 mW/cm2, specific capacity of 668 mAh/g and long-term cycling stability for more than 250 h. Experimental results proved that the excellent electrocat-alytic ORR activity of C60/FeTPP-70 0 would attribute to the synergistic effect between FeNx sites, Fe3C/Fe nanoparticles and the structure defects. This work provides a feasible and simple method to prepare non -noble metal-based ORR electrocatalysts for the application of energy storage and conversion. (c) 2023 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.
- 卷号：34
- 期号：5
- 是否译文：否