| 第一作者： | Shi, XY (Shi, Xiaoyue); Zhu, HW (Zhu, Hongwei); Du, J (Du, Jian); Cao, LJ (Cao, Lijuan); Wang, XL (Wang, Xilong); Liang, HP (Liang, Han-Pu); |
|---|---|
| 联系作者： | Shi, XY (Shi, Xiaoyue); Zhu, HW (Zhu, Hongwei); Du, J (Du, Jian); Cao, LJ (Cao, Lijuan); Wang, XL (Wang, Xilong); Liang, HP (Liang, Han-Pu); |
| 发表年度： | 2021 |
| 卷： | 370 |
| 页： | - |
| 摘要： | Iridium-based catalysts are state-of-the-art catalysts for oxygen evolution reaction (OER) under highly corrosive acidic condition. However, it remains challenges to simultaneously achieve enhanced activity and stability from Ir based OER catalyst. Herein, the amine molecules directed assembly method is used to coat of ultrasmall Ir nanoparticles (similar to 1.3 nm) on carbon (Ir NP/C). The catalyst with ultralow loading of 13.5 mu g(Ir) cm(-2) exhibits 70 mV lower overpotential to reach a current density of 10 mA cm(-2) and much longer lifetime than that of commercial IrO2 with high loading of 102 mu g(Ir) cm (-2). Experimental results suggest that the presence of a higher proportion of Ir-N on the top atomic layer of ultrasmall Ir nanoparticles, as evident from the X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) spectra of Ir NP/C, facilitated the enhanced performance. The findings could promote the understanding and developing of active Ir-based OER nanocatalysts with longer lifetime. (C) 2020 Published by Elsevier Ltd. |
| 刊物名称： | ELECTROCHIMICA ACTA |
| 影响因子： | 5.383 |
| 全文链接： | https://www.sciencedirect.com/science/article/pii/S0013468620321034?via%3Dihub |
