过电位
双功能
材料科学
电催化剂
异质结
煅烧
电解质
纳米颗粒
化学工程
双功能催化剂
碳纳米管
析氧
纳米技术
催化作用
电极
电化学
光电子学
化学
物理化学
生物化学
工程类
作者
Liuxiong Luo,Yuren Liu,Siyu Chen,Qingqing Zhu,Di Zhang,Yuzhuo Fu,Jiaqi Li,Jie Han,Shen Gong
出处
期刊:Small
[Wiley]
日期:2023-12-22
被引量:1
标识
DOI:10.1002/smll.202308756
摘要
Driven by the pressing demand for stable energy systems, zinc-air batteries (ZABs) have emerged as crucial energy storage solutions. However, the quest for cost-effective catalysts to enhance vital oxygen evolution and reduction reactions remains challenging. FeNiCo|MnGaOx heterostructure nanoparticles on carbon nanotubes (CNTs) are synthesized using liquid-phase reduction and H2 calcination approach. Compared to its component, such FeNiCo|MnGaOx /CNT shows a high synergistic effect, low impedance, and modulated electronic structure, leading to a superior bifunctional catalytic performance with an overpotential of 255 mV at 10 mA cm-2 and half-wave potential of 0.824 V (ω = 1600 rpm and 0.1 m KOH electrolyte). Moreover, ZABs based on FeNiCo|MnGaOx /CNT demonstrate notable features, including a peak power density of 136.1 mW cm-2 , a high specific capacity of 808.3 mAh gZn-1 , and outstanding stability throughout >158 h of uninterrupted charge-discharge cycling. Theoretical calculations reveal that the non-homogeneous interface can introduce more carriers and altered electronic structures to refine intermediate adsorption reactions, especially promoting O* formation, thereby enhancing electrocatalytic performance. This work demonstrates the importance of heterostructure interfacial modulation of electronic structure and enhancement of adsorption capacity in promoting the implementation of OER/ORR, ZABs, and related applications.
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