分析化学2026，Vol.54Issue(7)：1159-1173,15.DOI:10.19756/j.issn.0253-3820.261126
离子选择性电极的固体接触层材料研究进展
Progress in Solid-Contact Layer Materials for Ion-Selective Electrodes
摘要
Abstract
Solid-contact ion-selective electrodes(SC-ISEs)effectively overcome the limitations of conventional liquid-contact structures,such as leakage of the inner electrolyte solution,poor potential stability,and difficulties in miniaturization,by introducing a solid-contact(SC)layer between the ion-selective membrane(ISM)and the electronic conductor substrate.Owing to these advantages,SC-ISEs show broad application prospects in environmental monitoring,food safety,and biomedical analysis.As the key functional interface for ion-to-electron transduction,the SC layer plays a decisive role in determining the potential stability,standard potential reproducibility,and long-term reliability of the electrode.This review systematically summarized the research status and technological progress of SC-layer materials over the past decade.Particular emphasis was placed on the ion-to-electron transduction mechanisms of SC layers,including the electrical double-layer capacitance mechanism and the redox capacitance mechanism.Four major categories of SC-layer materials,namely conducting polymers,carbon nanomaterials,metals/metal compounds,and composite materials,were critically reviewed in terms of their structural characteristics,performance advantages,and limitations.Furthermore,common fabrication methods for SC layers,including electrochemical deposition and physical deposition,were summarized,together with the corresponding performance evaluation system,involving potential stability,capacitance,standard potential reproducibility,and interfacial resistance.Finally,in view of the current challenges,such as the unclear microscopic mechanism of ion-to-electron transduction,lack of unified performance evaluation standards,and insufficient long-term stability,future research directions were proposed,including deepening the understanding of interfacial transduction mechanisms,developing multifunctional composite materials with high capacitance,high hydrophobicity,and high stability,and establishing standardized performance evaluation protocols,thereby promoting the practical application and industrialization of SC-ISE in environmental monitoring,biomedical analysis,and related fields.关键词
离子选择性电极/固体接触层/离子-电子转导/导电聚合物/碳纳米材料/金属化合物/复合材料/评述Key words
Ion-selective electrodes/Solid-contact layer/Ion-to-electron transduction/Conducting polymers/Carbon nanomaterials/Metal compounds/Composites/Review引用本文复制引用
杜昊,韩沉花,闫娇娇,章春芳,陈家旺..离子选择性电极的固体接触层材料研究进展[J].分析化学,2026,54(7):1159-1173,15.基金项目
广东省科技计划项目(No.2025B1111150001)、广东省基础与应用基础研究重大项目(No.2023B0303000015)、浙江省"尖兵"计划项目(No.2024C03035)和国家重点研发计划项目(No.2024YFC2814904)资助. Supported by the Science and Technology Program of Guangdong Province(No.2025B1111150001),the Major Program for Basic and Applied Basic Research of Guangdong Province(No.2023B0303000015),the"Key Pioneer"Program of Zhejiang Province(No.2024C03035),and the National Key Research and Development Program of China(No.2024YFC2814904). （No.2025B1111150001）
