水电解过程中H$_2$气泡内的电解液喷射
Electrolyte spraying within H$_2$ bubbles during water electrolysis
AI总结：
本研究揭示了水电解中H2气泡通过微气泡聚并驱动Worthington射流破碎的电解液喷射机制，影响三相接触线并促进气泡脱离，为优化析气电化学系统提供关键见解。
摘要：
电解产生的气泡会显著降低电解的整体效率。因此，理解气泡的动力学对于优化水电解系统至关重要。本文展示了一种独特的输运机制：在析氢反应中，无论是在正常重力还是微重力环境下，微气泡的聚并驱动由Worthington射流破碎产生的电解液液滴进入气相。这表明H$_2$气泡不仅由氢气和蒸汽组成，还包含电解液组分。类似于液-气界面上气泡的破裂，这种行为导致气泡内部产生流动，该流动进一步受到气-电解液界面处Marangoni对流的影响，突显了界面的流动性。对于电极附着的气泡，喷射的液滴在气泡-电极接触区域形成电解液池，影响三相接触线附近的动力学，并有利于气泡从电极上脱离。本研究结果揭示了电解气泡的物理化学方面的关键见解，对优化析气电化学系统至关重要。此外，我们的发现对于研究射流形成和破裂的极限具有重要意义，这些极限与电解提取中的酸雾形成、海喷雾气溶胶的产生、液滴对液面的撞击等相关。
英文摘要：
Electrolytically generated gas bubbles can significantly hamper the overall electrolysis efficiency. Therefore it is crucial to understand their dynamics in order to optimise water electrolyzer systems. Here we demonstrate a distinct transport mechanism where coalescence with microbubbles drives electrolyte droplets, resulting from the fragmentation of the Worthington jet, into the gas phase during hydrogen evolution reaction, both in normal and microgravity environments. This indicates that the H$_2$ bubble is not only composed of hydrogen gas and vapor but also includes electrolyte fractions. Reminiscent of bursting bubbles on a liquid-gas interface, this behavior results in a flow inside the bubble, which is further affected by Marangoni convection at the gas-electrolyte interface, highlighting interface mobility. In the case of electrode-attached bubbles, the sprayed droplets form electrolyte puddles at the bubble-electrode contact area, affecting the dynamics near the three-phase contact line and favoring bubble detachment from the electrode. The results of this work unravel important insights into the physicochemical aspects of electrolytic gas bubbles, integral for optimizing gas-evolving electrochemical systems. Besides, our findings are essential for studying the limits of jet formation and rupture relevant to acid mist formation in electrowinning, generation of sea spray aerosols, impact of droplets on liquid surfaces, etc.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
