@article{Niu2024, 
author = {Xudong Niu and Jian Wei and Dongyao Xu and Jiajing Pei and Rui Sui},
title = {Charge-asymmetry Fe1Cu single-atom alloy catalyst for efficient oxygen reduction reaction},
year = {2024},
journal = {Nano Research},
volume = {17},
number = {6},
pages = {4702-4710},
keywords = {Fe1Cu single-atom alloy (SAA), electrocatalysis, oxygen reduction reaction, charge-asymmetry},
url = {https://www.sciopen.com/article/10.1007/s12274-023-6317-3},
doi = {10.1007/s12274-023-6317-3},
abstract = {The development of high-efficient and low-cost oxygen reduction reaction (ORR) electrocatalysts is crucial for the practical applications of metal-air batteries. One promising way is to develop Fe single-atom catalysts. However, the single active center and inherent electronic structure of Fe single-atom catalysts lead to the undesirable adsorption of multiple ORR intermediates. Herein, a charge-asymmetry single-atom alloy (SAA) catalyst with Fe–Cu dual sites supported on nitrogen-doped carbon nanosheet (Fe1Cu SAA/NC) was constructed. Various characterizations manifest the existence of electron interaction between Fe and Cu in Fe1Cu SAA/NC, which facilitates the adsorption of ORR intermediate for fast kinetics. Consequently, the charge-asymmetry Fe1Cu SAA/NC exhibits much faster ORR kinetics with a half-wave potential of 0.917 V vs. reversible hydrogen electrode (RHE), outperforming its counterparts in the references. Furthermore, Fe1Cu SAA/NC still maintains a high half-wave potential with only a drop of 5 mV after 5000 cycles, indicating excellent stability. This work provides a new strategy to design highly active and non-noble metal ORR electrocatalysts, which hold great potential for various catalytic applications.}
}