双功能
电催化剂
材料科学
碳纤维
催化作用
析氧
化学工程
纳米颗粒
无机化学
电池(电)
锌
化学
电极
纳米技术
冶金
复合材料
电化学
有机化学
物理化学
功率(物理)
工程类
物理
复合数
量子力学
作者
Jun Chen,Liandong Li,Yuanhui Cheng,Yan Huang,Chang Chen
标识
DOI:10.1016/j.ijhydene.2022.03.100
摘要
N–doped carbon confined FeNi alloys are promising candidate to noble Pt and IrO2 or RuO2 for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in rechargeable zinc-air batteries. However, it is difficult to control the distribution of transition metals in the precursor and electrocatalyst. Herein, we design a covalent organic polymer to realize the uniform distribution of metal, nitrogen and carbon precursors. The structure of the obtained electrocatalyst is FeNi nanoparticles coated with carbon shells dispersed on N-doped multilayer porous carbon ([email protected]). The resultant [email protected] delivered a half-wave potential for ORR of 0.878 V and a low potential of 1.59 V to achieve 10 mA cm−2 for OER, which surpasses commercial platinum/carbon and ruthenium dioxide. The outstanding bifunctional properties of [email protected] attribute to the synergistic coupling between N-doped carbon shells and dense FeNi nanoparticles. Moreover, the self-made zinc-air battery with [email protected] air-cathode displayed an excellent energy density of 137.7 mW cm−2 as well as cycling stability (100 h, 200 cycles).
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