电解
电解水
电流密度
膜
电极
材料科学
气泡
润湿
电解质
化学工程
化学
复合材料
机械
工程类
生物化学
量子力学
物理
物理化学
作者
Kai Deng,Hao Feng,Ying Zhang,Dong Liu,Qiang Li
出处
期刊:Joule
[Elsevier]
日期:2023-08-01
卷期号:7 (8): 1852-1866
被引量:13
标识
DOI:10.1016/j.joule.2023.06.010
摘要
Summary
To maximize product purity, current density and efficiency has never been demonstrated simultaneously for the membrane-less water electrolyzers that eliminate the use of a membrane or a diaphragm, as well as their unfavorable issues. Here, we successfully addressed the trade-offs by leveraging the rose-petal-effect-mimetic (RPEM) design strategy. We mimicked nature by alternating water-repellent and water-adhesive building blocks; the resultant RPEM electrode is in the Cassie-impregnating wetting state, which is ideal for efficient bubble-less gas evolution reactions. A bubble-less HER at a current density of 4.2 A cm−2, one order of magnitude larger than that of any known bubble-less electrodes, was demonstrated by the RPEM electrode. Based on this, we further constructed the RPEM electrolyzer and demonstrated membrane-less water electrolysis at 1 A cm−2 current density, simultaneously with 61.5% electrolysis efficiency and 0.003% hydrogen crossover, remarkably outperforming the state-of-the-art membrane-less water electrolyzer.
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