Out-of-plane coordination of iridium single atoms with organic molecules and cobalt–iron hydroxides to boost oxygen evolution reaction
學年 113
學期 1
出版（發表）日期 2024-10-21
作品名稱 Out-of-plane coordination of iridium single atoms with organic molecules and cobalt–iron hydroxides to boost oxygen evolution reaction
作品名稱（其他語言）
著者 Jie Zhao; Yue Guo; Zhiqi Zhang; Xilin Zhang; Qianqian Ji; Hua Zhang; Zhaoqi Song; Dongqing Liu; Jianrong Zeng; Chenghao Chuang; Erhuan Zhang; Yuhao Wang; Guangzhi Hu; Muhammad Asim Mushtaq; Waseem Raza; Xingke Cai; Francesco Ciucci
單位
出版者
著錄名稱、卷期、頁數 Nature Nanotechnology 20, p.57-66
摘要 Advancements in single-atom-based catalysts are crucial for enhancing oxygen evolution reaction (OER) performance while reducing precious metal usage. A comprehensive understanding of underlying mechanisms will expedite this progress further. Here we report Ir single atoms coordinated out-of-plane with dimethylimidazole (MI) on CoFe hydroxide (Ir1/(Co,Fe)-OH/MI). This Ir1/(Co,Fe)-OH/MI catalyst, which was prepared using a simple immersion method, delivers ultralow overpotentials of 179 mV at a current density of 10 mA cm−2 and 257 mV at 600 mA cm−2 as well as an ultra-small Tafel slope of 24 mV dec−1. Furthermore, Ir1/(Co,Fe)-OH/MI has a total mass activity exceeding that of commercial IrO2 by a factor of 58.4. Ab initio simulations indicate that the coordination of MI leads to electron redistribution around the Ir sites. This causes a positive shift in the d-band centre at adjacent Ir and Co sites, facilitating an optimal energy pathway for OER.
關鍵字
語言 en
ISSN 1748-3395; 1748-3387
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 否
國別 GBR
公開徵稿
出版型式 ,電子版,紙本
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機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/127641 )