材料科学
催化作用
制作
甲醇
化学工程
热解
可逆氢电极
纳米技术
氧气
溶剂
球磨机
氧还原
兴奋剂
电催化剂
电化学
电极
化学
光电子学
物理化学
工作电极
有机化学
复合材料
病理
工程类
医学
替代医学
作者
Xinlong Xu,Xiaoming Zhang,Zhangxun Xia,Rongchuan Sun,Huanqiao Li,Junhu Wang,Shansheng Yu,Suli Wang,Zhangxun Xia
标识
DOI:10.1016/j.jechem.2020.06.046
摘要
Fe–N–C endowed with inexpensiveness, high activity, and excellent anti-poisoning power have emerged as promising candidate catalysts for oxygen reduction reaction (ORR). Single-atom Fe–N–C electrocatalysts derived from Fe-doped ZIF-8 represent the top-level ORR performance. However, the current fabrication of Fe-doped ZIF-8 relies on heavy consumption of time, energy, cost and organic solvents. Herein, we develop a rapid and solvent-free method to produce Fe-doped ZIF-8 under microwave irradiation, which can be easily amplified in combination with ball-milling. After rational pyrolysis, Fe–N–C catalysts with atomic FeN4 sites well dispersed on the hierarchically porous carbon matrix are obtained, which exhibit exceptional ORR performance with a half-wave potential of 0.782 V (vs. reversible hydrogen electrode (RHE)) and brilliant methanol tolerance. The assembled direct methanol fuel cells (DMFCs) endow a peak power density of 61 mW cm−2 and extraordinary stability, highlighting the application perspective of this strategy.
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