电催化反应电极界面纳微气泡多尺度研究进展

Advances in multi-scale nano-micro bubble evolution of electrocatalysis reaction electrode interfaces

在电解水制氢、电催化还原CO_(2)等过程中,常伴随着电极表面纳微气泡的产生,其中气泡的成核、生长、运动等演变行为会极大影响电极表面活性位点的覆盖和释放,进而影响电化学反应效率.因此,电催化反应界面气泡的演化行为及调控机制,以及其如何影响反应速率、反应稳定性及选择性,是当前研究的热点.本文综述了电催化反应中电极界面纳微气泡的多尺度演化过程及其与电催化性能间的构效关系的研究进展,阐述了气泡的成核、生长和脱离的演化机制;以电解水制氢和CO_(2)电催化还原反应为典型研究体系,重点论述了电极结构和电解液设计对纳微气泡演化行为和反应效率的影响规律;从实验研究和计算角度,对电催化反应中电极界面纳微气泡的重点研究工作及发展趋势进行了展望.

The process of electrocatalytic reduction,including hydrogen evolution reaction(HER)and CO_(2) electroreduction(CO_(2)ER),involves the generation of nano-micro bubbles on the electrode surface.The evolution of these bubbles,including nucleation,growth,and movement,often leads to the reduction of the active electrode area,thereby affecting the electrochemical reaction efficiency.Therefore,current research focuses on understanding the evolutionary behavior and regulatory mechanism of surface bubbles during electrocatalytic reactions.This work presented the multi-scale evolution process of surface bubbles and their relationship with electrocatalysis performance.Besides,the mechanisms of bubble nucleation,growth,and detachment were introduced.Subsequently,regulating strategies of nano-micro bubbles behavior in HER and CO_(2)ER were discussed in detail.Finally,we described the current research and development trends of nanoscale bubbles at electrode surface in electrocatalytic reactions from both experimental and computational perspectives.