石墨烯/纳米银对Ag/AgCl海洋电场探测电极的改性机制研究
Study on the modification mechanism of Ag/AgCl marine electric field detection electrode by graphene/silver nanoparticle
李红霞 1徐瑞昌 2辛颉 1谢一戎3
作者信息
- 1. 海军工程大学 基础部,武汉 430033
- 2. 海军工程大学 基础部,武汉 430033;中国人民解放军92351 部队,海南 三亚 572011
- 3. 武汉英中高级中学,武汉 430030
- 折叠
摘要
针对不同含量石墨烯/纳米银改性的Ag/AgCl电极分别进行交流阻抗、扫描电镜、吸水率和电位稳定性测试.实验结果表明:随着石墨烯/纳米银含量的增加,改性Ag/AgCl电极的界面结构参数弥散系数Cdl-P增大,电容值Cdl-T减小,动力学特征参数电荷转移电阻Rct先减小后增大.基于交流阻抗测试得到的电极动力学特征信息及界面结构信息与电极的扫描电镜、吸水率以及电位稳定性测试结果基本吻合.石墨烯/纳米银对Ag/AgCl电极的改性主要体现在提高电极的表面均匀性和导电性,但是降低了电极的孔隙率,这 3 个方面影响的协同作用反映了石墨烯/纳米银对Ag/AgCl电极改性的内在机制.
Abstract
AC impedance,scanning electron microscopy,water absorption and potential stability test were carried out for Ag/AgCl electrodes modified by graphene/nano silver with different content.The experimental results show that with the increase of graphene/nano silver content,the interface structure parameter Cdl-P of the modified Ag/AgCl electrode increases,the capacitance value Cdl-T decreases,and the dynamic characteristic parameter charge transfer resistance Rct first decreases and then increases.The electrode dynamic characteristic information and interface structure information obtained based on AC impedance test are basically consistent with the scanning electron microscope,water absorption and potential stability test results of the electrode.The modification of Ag/AgCl electrode by graphene/nano silver is mainly reflected in three aspects:improving the surface uniformity and conductivity of the electrode,and reducing the porosity of the electrode.The synergistic effect of these three aspects reflects the internal mechanism of the modification of Ag/AgCl electrode by graphene/nano silver.
关键词
Ag/AgCl电极/石墨烯/纳米银/交流阻抗/电位稳定性/吸水率Key words
Ag/AgCl electrode/graphene/nano silver/AC impedance/potential stability/water absorption rate引用本文复制引用
基金项目
海军工程大学自主研发项目(2022501100)
出版年
2024
NETL
NSTL
万方数据