@article{Li2022, 
author = {Rui Li and Jingsong Xu and Qingkai Zhao and Wensheng Ren and Rongguang Zeng and Qifa Pan and Xiayan Yan and Jingwen Ba and Tao Tang and Wenhua Luo},
title = {Cathodic corrosion as a facile and universal method for the preparation of supported metal single atoms},
year = {2022},
journal = {Nano Research},
volume = {15},
number = {3},
pages = {1838-1844},
keywords = {top-down strategy, electrochemical atomic migration, cathodic corrosion, nitrogen doped carbon paper, metal single atoms, hydrogen evolution reaction},
url = {https://www.sciopen.com/article/10.1007/s12274-021-3767-3},
doi = {10.1007/s12274-021-3767-3},
abstract = {Top-down strategy has been generally adopted for preparation of metal single atom catalysts (SACs) due to the simplified synthetic process, metal economics, and scalability characteristics. Herein, we propose a general top-down route to convert metal nanoparticles into uniformly dispersed metal single atoms in mild electrochemical environment via a facile cathodic corrosion process. Within the synthetic process, Pt nanoparticles precursors are transformed into migrating Pt single atoms (Pt1) driven by a high negative potential; and subsequently these mobile Pt atoms are trapped and stabilized by N coordination sites of N-doped carbon paper (NCP). The as-prepared Pt1/NCP electrodes exhibit a superior catalytic activity toward hydrogen evolution reaction (HER) with a low overpotential of 0.022 V at 10 mA/cm2 and a low Tafel slope of 28.5 mV/dec as well as a long-term durability. Notably, the proposed electrochemical atomic migration strategy shows a promising generality for fabricating other metal single atoms (e.g., Pd, Ir, Cu), which may open a new avenue for metallic SACs preparation.}
}