Visualization of the electrochemical reaction is essential for comprehensively understanding the electrochemical reaction mechanism and precisely characterizing dynamic electrochemical processes. Herein, we propose a simple device that combines light-addressable potentiometric sensor (LAPS) imaging and microelectrodes to serve as a general electroanalysis platform for the label-free sensing and imaging of electrochemical reactions. In this device, two microelectrodes are assembled on the LAPS chip. Electrochemical reactions occurring on the microelectrodes can be qualitatively and quantitatively observed and visualized using a LAPS chip that is sensitive to the reaction products. Validations were performed to monitor the effect of water electrolysis and potassium ferrocyanide oxidation surrounding the microelectrodes, respectively. We believe that this study will provide an excellent platform for the visualization and monitoring of electrochemical reactions and broaden the application scope of LAPS imaging to a general electroanalysis tool that is widely applicable in several fields.

电化学反应的可视化对于全面了解电化学反应机理和精确表征动态电化学过程至关重要。在这里，我们提出了一种简单的装置，它结合了光可寻址电位传感器 (LAPS) 成像和微电极，作为用于电化学反应的无标记传感和成像的通用电分析平台。在该装置中，两个微电极组装在 LAPS 芯片上。使用对反应产物敏感的 LAPS 芯片可以定性和定量地观察和可视化发生在微电极上的电化学反应。进行验证以分别监测微电极周围的水电解和亚铁氰化钾氧化的影响。