In Situ Growth of NiFe Alloy Nanoparticles Embedded into N-Doped Bamboo-like Carbon Nanotubes as a Bifunctional Electrocatalyst for Zn–Air Batteries,ACS Applied Materials & Interfaces

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In Situ Growth of NiFe Alloy Nanoparticles Embedded into N-Doped Bamboo-like Carbon Nanotubes as a Bifunctional Electrocatalyst for Zn–Air Batteries
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-06-26 00:00:00 , DOI: 10.1021/acsami.8b04940
Duan Bin ₁ , Beibei Yang ₁ , Chao Li ₁ , Yao Liu ₁ , Xiao Zhang ₂ , Yonggang Wang ₁ , Yongyao Xia ₁

Affiliation

Developing low-cost catalysts for electrochemical oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) with superior performance in an alkaline solution is of significance for large-scale applications in aqueous zinc–air batteries (ZABs). Herein, we describe the in situ design of embedded NiFe nanoparticles into the N-doped bamboo-like carbon nanotube (NBCNT) with high catalytic performance and stability. The obtained [email protected] hybrid exhibits a high electrochemical activity and stability with an unexpectedly low overpotential of ∼195 mV for OER at 10 mA cm^–2 and an onset potential at 1.03 V for ORR, superior to the state-of-the-art Pt/C and RuO₂ catalysts. Additionally, compared to the mixture of Pt/C and RuO₂ cathodes, the ZAB based on the [email protected] cathode displays a lower overpotential (0.80 V), higher stable round-trip efficiency (58.3%), and improved power density for 200 cycles at 10 mA cm^–2. Apparently, the obtained results indicate that the [email protected] hybrid is proven to be one of the best nonnoble metal catalysts for achieving commercial implementation of rechargeable ZABs.

中文翻译：

NiFe合金纳米粒子的原位生长嵌入N掺杂的竹状碳纳米管中，作为锌空气电池的双功能电催化剂。

在碱性溶液中开发出性能卓越的低成本电化学氧化还原反应（ORR）和析氧反应（OER）催化剂，对于在水-锌-空气电池（ZABs）中的大规模应用具有重要意义。在本文中，我们描述了将NiFe纳米颗粒嵌入具有高催化性能和稳定性的N掺杂竹样碳纳米管（NBCNT）中的原位设计。所获得的[受电子邮件保护的]杂化物表现出高的电化学活性和稳定性，在10 mA cm ^–2时，OER的意外低过电位约为195 mV，而对于ORR，其起始电位在1.03 V时，优于目前的状态。现有的Pt / C和RuO ₂催化剂。此外，与Pt / C和RuO ₂的混合物相比阴极，基于[受电子邮件保护]阴极的ZAB显示出较低的过电势（0.80 V），较高的稳定往返效率（58.3％），以及在10 mA cm ^–2的200个循环中改善的功率密度。显然，所获得的结果表明，[电子邮件保护的]杂化物被证明是实现可再充电ZAB的商业实施的最佳非贵金属催化剂之一。

更新日期：2018-06-26

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