箔法
碳纤维
电催化剂
材料科学
电解质
涂层
电化学
热解
化学工程
氧气
蒸发
锌
阴极
炭黑
无机化学
纳米技术
电极
化学
冶金
物理化学
复合材料
有机化学
工程类
物理
复合数
热力学
天然橡胶
作者
Honglei Yang,Ao Xie,Yang Tang,Zixiang Wang,Jinpeng Zhang,Lingpo Kong,Peng Song,Yanzhi Sun,Pingyu Wan
标识
DOI:10.1002/chem.202103275
摘要
It is a great challenge to fabricate highly efficient pH-universal electrocatalysts for oxygen reduction reaction (ORR). Herein, a facile strategy, which includes coating the Fe modified ZIF8 on Cu foil and in situ pyrolysis to evaporate and dope Cu into the MOF derived carbon, is developed to fabricate Fe/Cu-N co-doped carbon material (Cu/Fe-NC). Profiting from the modulated electron distribution and textual properties, well-designed Cu/Fe-NC exhibits superior half-wave potential (E1/2 ) of 0.923 V in alkaline, 0.757 V in neutral and comparable 0.801 V in acid electrolytes, respectively. Furthermore, the ultralow peroxides yield of ORR demonstrates the high selectivity of Cu/Fe-NC in full pH scale electrolytes. As expected, the self-made alkaline and neutral zinc-air batteries equipped with Cu/Fe-NC cathode display excellent discharge voltages, outstanding peak power densities and remarkable stability. This work opens a new way to fabricate highly efficient and pH-universal electrocatalysts for ORR through strategy of Fe/Cu-N co-doping, Cu foil evaporation and carbon defects capture.
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