https://scholars.lib.ntu.edu.tw/handle/123456789/634660
標題: | Dealloying-Induced Zeolite-like Metal Framework of AB2 Laves Phase Intermetallic Electrocatalysts | 作者: | Ji, Shen-Jing Cao, Li-Wen Zhang, Peng Wang, Guan-Bo Lu, Ying-Rui Suen, Nian-Tzu Hung, Sung-Fu HAO MING CHEN |
公開日期: | 16-八月-2023 | 卷: | 145 | 期: | 32 | 起(迄)頁: | 17892 | 來源出版物: | Journal of the American Chemical Society | 摘要: | Exploring an efficient and robust electrocatalyst for hydrogen evolution reaction (HER) at high pH and temperature holds the key to the industrial application of alkaline water electrolysis (AWE). Herein, we design an open tunnel structure by dealloying a series of Laves phase intermetallics, i.e., MCo2 and MRu0.25Co1.75 (M = Sc and Zr). The dealloying process can induce a zeolite-like metal framework for ScCo2 and ScRu0.25Co1.75 by stripping Sc metal from the center of a tunnel structure. This structural engineering significantly lowers their overpotentials at a current density of 500 mA/cm2 (η500) ca. 80 mV in 1.0 M KOH. Through a simple process, ScRu0.25Co1.75 can be easily decorated on a carbon cloth substrate and only requires 132 mV to reach 500 mA/cm2. More importantly it can maintain activity over 1000 h in industrial conditions (6.0 M KOH at 333 K), showing its potential for practical industrial applications. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/634660 | ISSN: | 00027863 | DOI: | 10.1021/jacs.3c05287 |
顯示於: | 化學系 |
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