Affiliation:
1. School of Materials Science and Engineering Central South University Changsha Hunan 410083 China
2. State Key Laboratory of Powder Metallurgy Changsha Hunan 410083 China
Abstract
AbstractDriven 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.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
National Defense Pre-Research Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
4 articles.
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