化工进展2025，Vol.44Issue(3)：1243-1252,10.DOI:10.16085/j.issn.1000-6613.2024-0478
反应温度对光电极表面气泡动力学及传质特性的影响
Effect of reaction temperature on bubble dynamics and mass transfer characteristics on photoanode surface
摘要
Abstract
An important challenge related to the photoelectrochemical water splitting is the reduction in the reaction rate caused by the bubble coverage on the electrode surface.In this study,in-situ observation of bubble evolution on the TiO2 photoanode surface was achieved using an electrochemical system coupled with a high-speed camera system.The effects of reaction temperature on bubble dynamics and mass transfer were systematically explored.It indicated that both the photocurrent and gas evolution efficiency increased as the reaction temperature rise.Furthermore,the bubble growth coefficients during evolution also increased with temperature,consequently enhancing interfacial mass transfer through micro-convection,including single-phase natural convection and micro-convection induced by gas-liquid interface expansion.Although single-phase natural convection played a dominant role in mass transfer,the micro-convection induced by the expansion of gas-liquid interface gradually intensified with rising reaction temperature.Additionally,the bubble detachment size and growth period decreased with increasing reaction temperature.The dynamic model considering the temperature and concentration Marangoni force was established,and the predicted values matched well with the experimental results.关键词
光电催化分解水/气泡/温度/传质/微对流/马兰戈尼力Key words
photoelectrochemical water splitting/bubble/temperature/mass transfer/micro-convection/Marangoni force分类
化学化工引用本文复制引用
佘永璐,徐强,罗欣怡,聂腾飞,郭烈锦..反应温度对光电极表面气泡动力学及传质特性的影响[J].化工进展,2025,44(3):1243-1252,10.基金项目
国家自然科学基金(52422606). （52422606）
