电化学（中英文）2024，Vol.30Issue(3)：24-33,10.DOI:10.13208/j.electrochem.2303151
电极/碱性聚电解质界面的微分电容曲线和零电荷电位测定
The Determination of PZC and Differential Capacitance Curve of Platinum-Alkaline Polymer Electrolyte Interfaces
摘要
Abstract
Alkaline polymer electrolyte(APE)is the core component of modern alkaline hydrogen and oxygen fuel cells,and its single ion conductor nature makes the"electrode/APE"interfaces different from the conventional"electrode/so-lution"interfaces in terms of ion distribution,electrical double layer structure and polarization behavior.Due to the complexity of the APE and the associated solid-solid interfaces,fundamental investigations are challenging and deeper understanding of the structures and properties of such interfaces is in the infant stage.In this work,we aim to investigate the double layer structure from the aspects of differential capacitance curve and potential of zero charge(PZC)at the electrode/QAPPT(quaternary ammonia poly(Nmethyl-piperidine-co-p-terphenyl)interface.Cyclic vol-tammetry,electrochemical impedance spectroscopy(EIS)and microelectrode-based immersion techniques were employed.The differential capacitance curves of Pt/QAPPT interfaces exhibited an asymmetric U-shaped feature with a minimum at the potential which is consistent with the PZTC measured by the immersion method.The capacitance raised less quickly on the negative than the positive sides of the PZTC.These results reflect the characteristics of the single ion conductor and role of alkaline polyelectrolytes in modifying the double layer structure of the electrode/APE interfaces.关键词
碱性物电解质/双电层/微电极/微分电容曲线/零电荷电位Key words
Alkaline polymer electrolyte/Microelectrode/Differential capacitance curve/Potential of zero charge/Double layer structure引用本文复制引用
刘晨希,詹东平,张秋根,庄林,颜佳伟,毛秉伟,邹泽萍,胡梅雪,丁宇,谷宇,刘帅,南文静,马溢昌,陈招斌..电极/碱性聚电解质界面的微分电容曲线和零电荷电位测定[J].电化学（中英文）,2024,30(3):24-33,10.基金项目
This work was supported by the National Natural Science Foundation of China(Nos.21991150/1,21972119 and 22002129).The authors thank Pro-fessors Jun Cheng and Xiao-Hui Yang at the Xia-men University for the helpful discussion,and Yang Wang at the Xiamen University for the assistance of microelectrode preparation. （Nos.21991150/1,21972119 and 22002129）
