التفاصيل البيبلوغرافية
| العنوان: |
Facile Synthesis of Vertical Layered Double Hydroxides Nanosheets on Co@Carbon Nanoframes as Robust Bifunctional Oxygen Electrocatalysts for Rechargeable Zn–Air Batteries. |
| المؤلفون: |
Chang, Fangfang, Du, Hongnan, Su, Panpan, Sun, Yanhui, Ye, Runping, Tian, Qiang, Zhang, Guoxin, Li, Haitao, Liu, Jian |
| المصدر: |
Small Structures; Jan2024, Vol. 5 Issue 1, p1-9, 9p |
| مصطلحات موضوعية: |
LAYERED double hydroxides, ELECTROCATALYSTS, METAL-air batteries, STORAGE batteries, OXYGEN evolution reactions, NANOSTRUCTURED materials, ZINC catalysts |
| مستخلص: |
The development of efficient and low‐cost bifunctional catalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is imperative but remains challenging in rechargeable zinc–air batteries. Herein, a metal oxidation‐assisted approach is developed for the facile synthesis of a highly efficient bifunctional catalyst (Co@NC@LDHs) which is composed of layered double hydroxides (LDHs) nanosheets in situ vertically grown on the surface of hollow carbon nanoframes encapsulating Co nanoparticles (Co@NC). Specifically, the vertical LDHs distributing on the carbon surface ensure the maximized number of accessible active sites and the interaction between LDHs with the carbon matrix. The hierarchically structured bifunctional Co@NC@LDHs display an overpotential of 0.33 V at 10 mA cm−2 for OER and a half‐wave potential of 0.88 V for ORR. The potential gap (ΔE) of Co@NC@LDHs is calculated to be 0.68 V, outperforming the mixed Pt/C + RuO2 catalysts (ΔE = 0.77 V), manifesting its superior bifunctional electrocatalysis performance. Moreover, the Zn–air batteries based on Co@NC@LDHs electrocatalyst exhibit a high peak power density (185.2 mW cm−2) and excellent durability (5.0 mA cm−2 over 500 h). This work may provide a facile strategy for the fabrication of LDHs on carbon substrate, acting as efficient catalysts for broad energy‐related applications. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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