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Citation: Yawei Li, Siming Li, Fuhao Duan, Xuran Wang, Yangyang Zhao, Yue Zhang, Wei Guo, Junsheng Hao. 基于旋转电极双通道新方法的铁氰化钾电化学反应过程分析改进实验[J]. University Chemistry, ;2026, 41(5): 91-100. doi: 10.12461/PKU.DXHX202511082 shu

基于旋转电极双通道新方法的铁氰化钾电化学反应过程分析改进实验

School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, Shanxi Province, China

Corresponding author: Yawei Li, Wei Guo, Junsheng Hao,
Received Date: 13 November 2025
Revised Date: 25 February 2026

传统“循环伏安法测定铁氰化钾的电极反应过程”在静态条件下进行，不能有效捕捉传质过程对反应速率的影响，仅能提供热力学参数(如峰电位差，ΔE_p)，却无法深入分析反应动力学，限制了学生对反应机制的全面理解。本实验针对仪器分析实验中传统铁氰化钾电极反应实验的局限性，创新性地引入旋转环盘电极(RRDE)技术，构建多参数检测平台。通过盘电极扫描铁氰化钾还原主反应，同步利用环电极恒电位氧化捕获中间副产物，结合Koutecký-Levich方程定量解析传质与反应动力学的竞争机制。实验通过计算电极反应的动力学电流密度与副产物占比，使学生对铁氰化钾的电化学反应过程机制有了更深理解。此外，实验过程中通过优化电极和反应环境清洁度，使学生们测定的铁氰化钾电化学氧化还原ΔE_p接近于热力学理想值。该实验设计突破了传统静态体系的局限，为电化学教学衔接前沿科研提供了创新路径。改进后的实验已成功应用于本校化学专业大三年级“仪器分析实验”教学，开设2个学期，覆盖6个教学班共176名学生。
- Rotating ring-disk electrode,
- Potassium ferricyanide,
- Electrochemical kinetics,
- Mass transfer process,
- Koutecký-Levich equation
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