@article{Wang2023, 
author = {Dongdi Wang and Shanshan Ruan and Peiyu Ma and Ruyang Wang and Xilan Ding and Ming Zuo and Lidong Zhang and Zhirong Zhang and Jie Zeng and Jun Bao},
title = {Confinement synergy at the heterointerface for enhanced oxygen evolution},
year = {2023},
journal = {Nano Research},
volume = {16},
number = {7},
pages = {8793-8799},
keywords = {clusters, heterointerface, confinement synergy, oxygen evolution reaction},
url = {https://www.sciopen.com/article/10.1007/s12274-023-5514-4},
doi = {10.1007/s12274-023-5514-4},
abstract = {Two-dimensional transition metal hydroxides with abundant reserves and low prices have played an indispensable role in energy catalytic applications. Recent reports indicated that the incorporation of Fe species into Co-based catalysts can synergistically enhance oxygen evolution reaction (OER) activity. Constructing a heterointerface on the surface of Co-based catalysts can provide a platform to investigate the role of heterointerface in reaction kinetics. Herein, we constructed a Fe-O-Co heterointerface without electronic effect by depositing FeOx clusters on the oxygen vacancies of CoOOH surface. FeOx/CoOOH exhibited excellent OER intrinsic activity, which can deliver the turnover frequency (TOF) of 4.56 s−1 at the overpotentials of 300 mV and the Tafel slope of 33 mV·dec−1. In-situ electrochemical impedance spectroscopy (EIS) and density functional theory (DFT) calculations demonstrated that the synergistic effect between Fe sites and Co sites confined at the Fe-O-Co heterointerface accelerated the charge transfer during OER and optimized the adsorption of oxygen intermediates, consequently enhancing OER.}
}