Efficient Mesh Interface Engineering: Insights from Bubble Dynamics in Electrocatalysis
Efficient Mesh Interface Engineering: Insights from Bubble Dynamics in Electrocatalysis
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高效的网格界面工程：电催化中气泡动力学的见解
DOI：
10.1021/acsami.1c07637
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发表时间：
2021
影响因子：
9.5
通讯作者：
Wang Zhijie
中科院分区：
文献类型：
--
作者：
Li Long;Jiang Wenjun;Zhang Guang;Feng Deqiang;Zhang Ce;Yao Wei;Wang Zhijie
电化学催化在学术界和工业界具有巨大的能量和质量转化潜力。然而，气泡动力学及其对放气电极系统的影响仍然不明确。为了充分了解两相流动的演变和分布，需要详细了解不同相间的局部输运过程和基本机理。在这里，我们构建了一个三电极裂水反应系统来研究不同形貌的钛电极的气泡动力学和系统效率。系统地研究了平板电极和100目、150目和300目结构电极上的气泡在外加电压条件下的动力学。详细讨论了影响两相流演化和电化学反应性能的参数和机理。最后，对气泡的动态力平衡进行了分析，说明了气泡的动态力平衡机理和实验观察。我们的研究为电催化放气提供了见解，并为设计和制造高性能的电催化反应器提供了机会。
Electrochemical catalysis offers great potential in energy and mass conversion in academy and industry. However, bubble dynamics and its influence on gas-evolving electrode systems remain ambiguous. Detailed information on the local transport process between different phases and the underlying mechanism are required for the full understanding of two-phase flow evolution and distribution. Here, we construct a three-electrode water splitting reaction system to study the bubble dynamics and system efficiency of titanium electrodes with different morphologies. The dynamics of a gas bubble at an electrode with a plate and 100-mesh, 150-mesh, and 300-mesh structures is systematically investigated with respect to applied voltage conditions. Parameters and underlying mechanisms that influence the two-phase flow evolution and electrochemical reaction performance are carefully discussed. Finally, the underlying dynamic force balance on the gas bubble is analyzed to illustrate the mechanism and experimental observations. Our study provides insights in gas-evolving electrocatalysis and offers opportunities for the design and fabrication of high-performance electrocatalytic reactors.