24小时热门版块排行榜

返回列表

swimvc

银虫 (著名写手)

应助: 16 (小学生)
金币: 1911.7
散金: 395
红花: 10
帖子: 1065
在线: 325.1小时
虫号: 847021
注册: 2009-09-13
专业: 电化学分析

[交流] 【求助】求教，什么情况下会导致做CV图时，扫速快时出峰，扫速慢时不出峰已有2人参与

如题
今天做修饰电极出现了这样的情况，谁知道什么原因呢？

回复此楼

» 猜你喜欢

1楼 2010-11-10 19:30:10

已阅回复此楼关注TA 给TA发消息送TA红花 TA的回帖

jiehe2009

金虫 (初入文坛)

应助: 0 (幼儿园)
金币: 961.8
帖子: 18
在线: 30.1小时
虫号: 847243
注册: 2009-09-14
专业: 应用高分子化学与物理

is your chemical in the electrode quite easy to desorb?

★
小木虫(金币+0.5):给个红包，谢谢回帖交流

Don't forget the electrochemical reaction occurs at surface. If the chemical for some reason can't form sort of stong enough interaction with electrode, then CV peak can't be found. Specifically, if the CV scan speed is high, more reactant is used kinetically, the anodic or cathodic current peak is easy to find. Conversely, the CV scan speed is low, relative low content of reactant at the electrode surface is reached, it is more difficult to find CV peak.
On the other hand, is your electrolyte conductive enough? If not, the electrochemical reaction is going to be more sluglish.