双功能
电催化剂
锌
材料科学
碳纳米管
碳纤维
无机化学
纳米颗粒
化学工程
析氧
电化学
催化作用
纳米技术
化学
电极
有机化学
冶金
复合材料
物理化学
复合数
工程类
作者
Yusong Deng,Jiahui Zheng,Bei Liu,Yijiang Liu,Huaming Li,Mei Yang
出处
期刊:Carbon
[Elsevier BV]
日期:2023-04-19
卷期号:210: 118000-118000
被引量:26
标识
DOI:10.1016/j.carbon.2023.04.006
摘要
Controllable designing of robust and cost-effective bifunctional electrocatalysts toward oxygen reduction/evolution reaction (ORR/OER) is essential to zinc-air batteries (ZABs) but still a challenge. Herein, a promising strategy is proposed to construct a bifunctional oxygen electrocatalyst composed of FeCo alloy nanoparticles embedded in ultralong N-doped carbon nanotubes (FeCo-LCNT). The in-situ catalytic generated FeCo-LCNT is yielded via the condensation polymerization of 2,5-dihydroxy-p-benzoquinone and tripolycyanamide, followed by the coordination with Fe3+/Co2+ ions and subsequent pyrolysis. The as-obtained FeCo-LCNT manifests improved bifunctional activity and durability in comparison with commercial Pt/C and IrO2. The experimental results and DFT calculations demonstrate that the interaction between alloy nanoparticles and CNT and the presence of N-doped carbon species are of crucial importance in enhancing the catalytic activities of the FeCo-LCNT. Impressively, the FeCo-LCNT can serve as air-electrode catalyst, endowing the assembled rechargeable liquid and flexible all-solid-state ZABs with good high-rate performance, long cyclic life (for the former) and enhanced stability at various bending angles (for the latter).
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