@article{Sheng2021, 
author = {Jian Sheng and Sheng Zhu and Guodong Jia and Xu Liu and Yan Li},
title = {Carbon nanotube supported bifunctional electrocatalysts containing iron-nitrogen-carbon active sites for zinc-air batteries},
year = {2021},
journal = {Nano Research},
volume = {14},
number = {12},
pages = {4541-4547},
keywords = {carbon nanotube, zinc-air batteries, bifunctional electrocatalyst, single atoms, Fe-N-C sites},
url = {https://www.sciopen.com/article/10.1007/s12274-021-3369-0},
doi = {10.1007/s12274-021-3369-0},
abstract = {Bifunctional electrocatalysts with high activity toward both oxygen reduction and evolution reaction are highly desirable for rechargeable Zn-air batteries. Herein, a kind of carbon nanotube (CNT) supported single-site Fe-N-C catalyst was fabricated via pyrolyzing in-situ grown Fe-containing zeolitic imidazolate frameworks on CNTs. CNTs not only serve as the physical supports of the Fe-N-C active sites but also provide a conductive network to facilitate the fast electron and ion transfer. The as-synthesized catalysts exhibit a half-wave potential of 0.865 V for oxygen reduction reaction and a low overpotential of 0.442 V at 10 mA·cm-2 for oxygen evolution, which is 310 mV smaller than that of Fe-N-C without CNTs. The rechargeable Zn-air batteries fabricated with such hybrid catalysts display a high peak power density of 182 mW·cm-2 and an excellent cycling stability of over 1, 000 h at 10 mA·cm-2, which outperforms commercial Pt-C and most of the reported catalysts. This facile strategy of combining single-site Metal-N-C with CNTs network is effective for preparing highly active bifunctional electrocatalysts.}
}