In-Situ Generated High-Valent Iron Single-Atom Catalyst for Efficient Oxygen Evolution.
- 影响因子：11.189
- DOI码：10.1021/acs.nanolett.1c01335
- 发表刊物：Nano Lett.
- 关键字：single atom catalysts
high-valent iron
oxygen evolution
- 摘要：Oxygen evolution reaction (OER) plays an important role in renewable energy supplies as the anodic reaction for electrochemical transformation of various chemicals. Iron-based OER catalysts are potential candidates due to their abundance but suffer from poor activity. Here we demonstrate that a single-atom iron catalyst with in-situ generated Fe4+ centers is highly active toward OER. Only an overpotential of 320 mV was needed to reach 10 mA cm(-2). The catalyst exhibited an ultrahigh turnover frequency of 0.62 s(-1) at an overpotential of 0.35 V, which is comparable to currently reported transitional-metal based OER catalysts. Experimental and theoretical studies revealed that the valence state of the metal center transferred from Fe3+ to highly active Fe4+ prior to the OER process. This transformation was originated from the strong interaction between atomic Fe and carbon support via C-O-Fe bonding, leading to a lower energy barrier of the rate-limiting *OOH formation.
- 合写作者：Xiangyang Li, Chunxiao Liu, Dongdi Wang, Rui Si, Jinlong Yang
- 第一作者：Zhirong Zhang, Chen Feng
- 通讯作者：Shiming Zhou, Jie Zeng
- 文献类型：SCI
- 卷号：21
- 期号：11
- 页面范围：4795-4801
- 是否译文：否
- 发表时间：2021/05/21
- 发布期刊链接：https://pubs.acs.org/doi/abs/10.1021/acs.nanolett.1c01335
