(Fe,Co)/N‐Doped Multi‐Walled Carbon Nanotubes as Efficient Bifunctional Electrocatalysts for Rechargeable Zinc‐Air Batteries,ChemCatChem

当前位置： X-MOL 学术 › ChemCatChem › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

(Fe,Co)/N‐Doped Multi‐Walled Carbon Nanotubes as Efficient Bifunctional Electrocatalysts for Rechargeable Zinc‐Air Batteries
ChemCatChem ( IF 3.8 ) Pub Date : 2020-11-28 , DOI: 10.1002/cctc.202001131
Yugang Qi ₁ , Shan Yuan ₁ , Lili Cui ₁ , Zizhun Wang ₂ , Xingquan He ₁ , Wei Zhang ₂ , Tewodros Asefa ₃

Affiliation

The design and fabrication of efficient, less costly, and stable bifunctional oxygen electrode electrocatalysts is crucial for large‐scale production of rechargeable zinc‐air batteries. Herein, electrocatalytically active, hybrid materials composed of Fe−Co alloy nanoparticles‐embedded N‐doped carbon nanotubes (CNTs) are synthesized from Fe/Co‐polyporphyrin‐CNTs via pyrolysis. The materials serve as highly effective bifunctional oxygen electrode catalysts for zinc‐air batteries. In particular, the one synthesized at 700 °C, named CNTs@(Fe,Co)PP‐700, shows a very good activity for both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) in an alkaline solution. This material catalyzes ORR with a limiting current density of 5.11 mA cm⁻² and a half‐wave potential of 0.86 V vs RHE. It also catalyzes OER with 10 mA cm⁻² at a small overpotential of 360 mV. Besides, it operates well as an air cathode in a home‐made rechargeable zinc‐air battery, with a small voltage gap of 0.71 V at 2 mA cm⁻², while remaining stable in hundreds of charge‐discharge cycles for >83 h. Its performance in a zinc‐air battery is better than that of a benchmark air‐electrode containing noble metals, Pt/C+RuO₂.

中文翻译：

（Fe，Co）/ N掺杂的多壁碳纳米管作为可充电锌空气电池的高效双功能电催化剂

设计和制造高效，成本更低且稳定的双功能氧电极电催化剂对于大规模生产可充电锌空气电池至关重要。在此，由Fe / Co-多卟啉-CNT通过热解合成了由Fe-Co合金纳米颗粒嵌入的N掺杂碳纳米管（CNT）组成的电催化活性杂化材料。该材料可用作锌-空气电池组的高效双功能氧电极催化剂。特别是在700°C下合成的一种名为CNTs @（Fe，Co）PP-700的化合物在碱性溶液中对氧还原反应（ORR）和氧释放反应（OER）都显示出非常好的活性。该材料以5.11 mA cm ^-2的极限电流密度催化ORR与RHE相比，半波电势为0.86V。它还在360 mV的小过电位下以10 mA cm ^-2催化OER 。此外，它在家用可充电锌-空气电池中可作为空气阴极很好地工作，在2 mA cm ^-2时具有0.71 V的小电压间隙，同时在数百个充放电循环中保持稳定> 83 h。它在锌空气电池中的性能要优于包含贵金属的基准空气电极Pt / C + RuO _2的性能。

更新日期：2021-02-05

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11