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mygalaxy1977

铜虫 (正式写手)

[求助] 几个电化学实验小问题

A conventional three-electrode cell was used with the geometric area of the electrode defined by the circular opening in an intert elastomer gasket (0.40 cm2). A Pt coil auxiliary electrode and a Ag/AgCl/saturated LiClO4 reference electrode (-34 mV vs SCE) were used; all voltages are given with respect to this reference. All electrolysis solutions were 0.1 M LiClO4 in absolute ethanol.
有几个疑问:
(1) 为什么要用Ag/AgCl/saturated LiClO4 reference electrode, 而不是通常我们说的Ag/AgCl reference electrode;
(2)  -34mV vs SCE, SCE是什么意思?
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inkul

金虫 (小有名气)

【答案】应助回帖

感谢参与,应助指数 +1
mygalaxy1977(金币+10): ★★★很有帮助 谢谢 2012-02-26 12:27:06
第一个问题
他用的是什么溶液呢?RE并不一定是某一种电极,只要有稳定的potential的都可以作为RE,有的时候会根据溶液自己做参比电极。因为RE和溶液之间其实是有物质交换的。如果是我,我会用ethanol作为RE里面的溶剂。
个人觉得没必要太纠结这个。
第二个问题
SCE: Saturated calomel electrode 饱和甘汞电极
2楼2012-02-25 22:26:57
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