电催化剂
碳纳米管
碳纤维
兴奋剂
热解
催化作用
材料科学
氧气
多孔性
化学工程
无机化学
化学
纳米技术
电化学
物理化学
有机化学
复合材料
电极
复合数
工程类
光电子学
作者
Jin Lin,Yuhong Du,Guangping Wu,Chao Wang,Li Guo,Yanzhong Wang
标识
DOI:10.1016/j.ijhydene.2022.09.282
摘要
Rational design of efficient and durable non-noble transition metal doped carbon-based oxygen reduction electrocatalysts is the key to reduce catalyst cost and optimize fuel cell performance. Herein, hierarchically porous Fe/N co-doped porous carbon on N doped carbon nanotubes (Fe/N-C@NCNTs) are prepared via the pyrolysis of Fe-doped ZIF-8 embedded on polypyrrole nanotubes (PNTs). The as-prepared Fe/N-C@NCNTs electrocatalyst exhibits the limit current density of 5.7 mA cm−2 and the half-wave potential of 0.84 V (vs. RHE), indicating the excellent oxygen reduction performance. Furthermore, the electrocatalytic activity of Fe/N-C@NCNTs is only reduced by 7% after 650 min of the stability test. The remarkable oxygen reduction performance is attributed to the synergistic effects of abundant Fe-Nx-C active sites, high graphitization degree and hierarchically porous structure of electrocatalyst.
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