| Autor: |
Ma, Xuena, Liu, Mingyang, Li, Qi, Xiao, Xudong, Liu, Jianan, Xu, Xiaoqin, Yin, Yihang, Qiao, Panzhe, Zhang, Luoming, Zou, Xiaoyan, Wang, Ruihong, Jiang, Baojiang |
| Zdroj: |
Journal of Materials Chemistry A; 8/21/2023, Vol. 11 Issue 31, p16889-16899, 11p |
| Abstrakt: |
For developing rechargeable zinc–air batteries (ZABs), designing reasonably high-activity and robust endurance electrocatalysts toward oxygen evolution/reduction reactions (OER/ORR) is of paramount importance. Single-atom catalysts (SACs) have been considered as ideal candidates for driving oxygen electrocatalysis in ZABs owing to their high electrocatalytic activity and atom utilization. However, oxidation and aggregation hinder their practical application. To address this issue, Co single atom-decorated RuO2 nanoparticles loaded on nitrogen-doped ultrathin porous carbon nanosheets (designated as CoSA-RuO2-NUCN) were synthesized. We provide an effective method for stabilizing cobalt atom with ruthenium dioxide; the strong interfacial interaction between CoSA-RuO2 makes the Co–O–Ru interface extremely stable in the electrocatalytic oxidation reaction. Meanwhile, CoSA-RuO2 combines with ultrathin carbon nanosheets to enhance the conductivity. Consequently, the obtained CoSA-RuO2-NUCN exhibits outstanding performance toward ORR (half-wave potential of 0.90 V) and OER (280 mV at 10 mA cm−2), respectively. Moreover, the rechargeable ZAB with CoSA-RuO2-NUCN shows high open-circuit voltage (1.55 V), ultrahigh specific capacity (766.14 mA h g−1), and superb long-term cycling stability (800 h), outperforming the commercial Pt/C + RuO2. This study not only presents a method to obtain a high-activity and strong stability electrocatalyst but also encourages to explore advanced materials to promote the development of ZABs. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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