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ZANCAI

新虫 (著名写手)

应助: 5 (幼儿园)
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虫号: 398036
注册: 2007-06-10
专业: 绿色有机化学

[求助] 菜鸟求救：请教一个关于工作电极和反电极的问题

我要对一个导电高聚物通过加正电压和负电压来发实现其氧化态和还原态的反复转变。查到文献是用如下方法实现的：
Electrochemical switching and EIS measurements were performed using a two-electrode configuration, with the working and counter electrodes attached to opposite ends of the sample, which had a typical size of 1.5 cm × 1.5 cm. The reference and counter electrodes were shorted as is typically done for two-electrode impedance measurements. The working and counter electrodes were interfaced onto the surface of the sample through thin strips of highly conductive copper metal (sheet resistance ∼1 Ohm), dimensions 3 mm × 10 mm × 0.1 mm.The material was switched to its reduced state by application of a − 1.0 V potential to the working electrode, for an appropriate period of time until a charge of ∼ 0.1 C had been passed.

但我还是没有搞清楚，有如下的疑问，希望知道的虫子能解答多少是多少：
（1）工作电极和反电极是分别做在样品同一个表面上的两端吗？
（2）当对工作电极加-1.0V电压的时候，反电极的电压不是应该是 +1.0V 吗？那么正负电压都同时加到样品上了，如何会实现样品从氧化态到还原态呢？
（3）如果我要实现从还原态再回到到达氧化态，就在工作电极加+1.0V的电压就可以了吗？
(4) 我设想如果把样品一个表面连到工作电极上，而样品的另个表面贴一层固体电解质，在固体电解质上再贴一层非常导电的材料并将导电材料连到反电极上，在工作电极上加+1v或-1v的电压是否也可以实现样品的氧化还原态转换？

[ Last edited by ZANCAI on 2012-6-5 at 02:45 ]

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