纳米纤维
化学工程
材料科学
催化作用
碳化
电池(电)
碳纤维
法拉第效率
静电纺丝
石墨
甲醇
纳米晶
碳纳米纤维
纳米颗粒
纳米技术
电解质
电极
化学
复合材料
有机化学
复合数
物理化学
功率(物理)
工程类
物理
碳纳米管
聚合物
量子力学
扫描电子显微镜
作者
Jie Di,Guo Jun,Nannan Wang,Guiping Ma
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2019-03-11
卷期号:7 (8): 7716-7727
被引量:34
标识
DOI:10.1021/acssuschemeng.8b06447
摘要
In this work, unique sugar-coated haws stick-like core–shell ZIF-67@PAN-HCCP-MIM-FeCl3 nanofibers were successfully prepared by electrospinning and an in situ nanocrystal growth process. After carbonization of the as-synthesized nanofibers at various temperatures, the resulting sample Fe/Co-N/P-9 (carbonized at 900 °C) retained the presented a sugar-coated haws stick-like structure. The internal carbon nanofiber acts like a “stick” as a support, the “haws” composed of Co2P and Fe5C2 nanoparticles act as catalytic active sites, and the graphite carbon acts as “sugar” to protect particles from detachment. The channel gap between inner core and outer layer can improve the mass transfer process. Owing to these special structure and unique composition features, Fe/Co-N/P-9 exhibited excellent oxygen reduction reaction (ORR) performance with an onset potential of 0.96 V (vs RHE) and a half wave potential of 0.85 V (vs RHE) in 0.1 M KOH solution. Fe/Co-N/P-9 also showed good catalytic stability and methanol tolerance. In addition, the rechargeable Zn–air battery fabricated by Fe/Co-N/P-9 exhibited a galvanostatic discharge voltage of 1.25 V, a higher specific capacity of 565 mAh/gZn, and a better cycle stability than Pt/C+RuO2.
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