催化作用
电催化剂
电池(电)
材料科学
氧气
兴奋剂
纳米颗粒
化学工程
纳米技术
电极
化学
光电子学
电化学
有机化学
物理化学
量子力学
物理
工程类
功率(物理)
作者
Yanzhi Wang,Taimin Yang,Xingwang Fan,Zijia Bao,Akhil Tayal,Huang Tan,Mengxiao Shi,Zuozhong Liang,Wei Zhang,Haiping Lin,Rui Cao,Zhehao Huang,Haoquan Zheng
标识
DOI:10.1002/anie.202313034
摘要
Oxygen reduction reaction (ORR) is of critical significance in the advancement of fuel cells and zinc-air batteries. The iron-nitrogen (Fe-Nx ) sites exhibited exceptional reactivity towards ORR. However, the task of designing and controlling the local structure of Fe species for high ORR activity and stability remains a challenge. Herein, we have achieved successful immobilization of Fe species onto the highly curved surface of S, N co-doped carbonaceous nanosprings (denoted as FeNS/Fe3 C@CNS). The induction of this twisted configuration within FeNS/Fe3 C@CNS arose from the assembly of chiral templates. For electrocatalytic ORR tests, FeNS/Fe3 C@CNS exhibits a half-wave potential (E1/2 ) of 0.91 V in alkaline medium and a E1/2 of 0.78 V in acidic medium. The Fe single atoms and Fe3 C nanoparticles are coexistent and play as active centers within FeNS/Fe3 C@CNS. The highly curved surface, coupled with S substitution in the coordination layer, served to reduce the energy barrier for ORR, thereby enhancing the intrinsic catalytic activity of the Fe single-atom sites. We also assembled a wearable flexible Zn-air battery using FeNS/Fe3 C@CNS as electrocatalysts. This work provides new insights into the construction of highly curved surfaces within carbon materials, offering high electrocatalytic efficacy and remarkable performance for flexible energy conversion devices.
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