Square Wave Electroanalysis at Generator-Collector Gold-Gold Double Hemisphere Junctions
Square Wave Electroanalysis at Generator-Collector Gold-Gold Double Hemisphere Junctions
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发电机-集电极金-金双半球结处的方波电解分析
DOI：
10.1002/elan.201200242
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发表时间：
2012
期刊：
影响因子：
3
通讯作者：
Lewis G
中科院分区：
文献类型：
--
作者：
Lewis G
金-金双半球结电极的电极间隙一般为1 微米，用于发电机-集电方波伏安法。电化学数据被记录为发生器和收集器电位的函数，以给出三维响应“图”。在足够低的频率下，实现了集电极响应的接近稳态条件，并记录了与发电机电极的峰值响应互补的峰值响应。由于局部电极间间隙扩散(快速)而不是外围扩散(慢速)，可以获得关于反应产物和中间体的信息。局部pH梯度效应为分析检测的未来应用提供了更多的“指纹”信息。
Gold–gold double‐hemisphere junction electrodes with an inter‐electrode gap of typically 1 µm are employed for generator–collector square wave voltammetry. Electrochemical data are recorded as a function of both generator and collector potential to give three‐dimensional response “maps”. At sufficiently low frequencies, close‐to‐steady‐state conditions for the collector response are achieved and peak responses complementary to those for the generator electrode are recorded. Due to localised interelectrode gap diffusion (fast) as opposed to peripheral diffusion (slow), information about reaction products and intermediates can be obtained. Local pH gradient effects provide additional “fingerprint” information beneficial for future application in analytical detection.