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| 毛细管微电极制备参数优化 |
| Parameter optimization for capillary microelectrode preparation |
| 投稿时间：2018-12-12 |
| DOI： |
| 中文关键词: Ag/AgCl参比电极 毛细管微电极 电极稳定性 微区电化学测试 极化电流密度 |
| 英文关键词: Ag/AgCl reference electrode capillary microelectrode electrode stability micro region eletrochemistry test polarization current density |
| 基金项目:国家自然科学基金资助项目(51871171). |
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| 中文摘要: |
| 采用电解氯化法制备Ag/AgCl参比电极,结合铂丝辅助电极及毛细玻璃管制作微区电化学测试用毛细管微电极,借助电化学测试及微观形貌分析研究了不同电解工艺参数及毛细管管口口径对微电极性能的影响。结果表明,随着电解极化电流密度、极化时间、电解液浓度的增加,所制备的Ag/AgCl参比电极稳定性先增加后降低,在浓度为0.25 mol/L的HCl溶液中以3.2 mA/cm2的极化电流密度极化30 min时,所制Ag/AgCl参比电极稳定性最佳；将微电极的毛细管管口口径控制在50~110 μm时,可保证较高的微区电化学测试成功率。 |
| 英文摘要: |
| An Ag/AgCl reference electrode prepared by electrolytic chlorination, a platinum filament auxiliary electrode and a capillary glass tube were employed to assemble a capillary microelectrode. The effect of electrolytic process parameters and capillary-bore diameter on the performance of microelectrode was investigated by electrochemical measurement and microscopic morphology analysis. Results show that with increasing polarization current density, polarization time and electrolyte concentration, the stability of Ag/AgCl reference electrode increases at first and then decreases. The prepared Ag/AgCl reference electrode shows the best stability when polarized in 0.25 mol/L HCl solution at 3.2 mA/cm2 current density for 30 min. The capillary-bore diameter between 50 and 110 μm ensures a high success rate for micro region electrochemical tests. |
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