Ag/AgCl参比电极的电化学石英晶体微天平研究

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  本文采用电化学石英晶体微天平研究了Ag/AgCl 参比电极在3.5%NaCl 溶液中电极表面AgCl 的溶解过程,并结合扫描电子显微镜电镜(SEM) 及能谱仪(EDX)测试手段对AgCl 溶解过程中电极表面形貌和成分进行分析,探讨Ag/AgCl 参比电极表面AgCl 含量与电极电位的关系。结果表明,Ag/AgCl 参比电极表面的AgCl 在3.5%的NaCl 溶液会缓慢溶解,溶解速率约为6×10 -6 mg/min ;当Ag/AgCl 参比电极表面AgCl 的质量百分数在8%~97%范围内时,电极电位比较稳定,并且接近理论电极电位,可作为有效参比电极使用。
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