24小时热门版块排行榜    

查看: 419  |  回复: 3
当前主题已经存档。

syb

银虫 (小有名气)

[交流] 请教:旋转圆盘电极中I~rpm^(1/2)曲线偏离直线说明什么?

旋转圆盘电极中,液相传质速度控制的电流与转速的1/2次方成正比关系,那么在I vs. w^(1/2)图形中应该是一条直线。
如果在高转速下,比如4900rpm,3600rpm,I-V曲线基本重合。也就是说,在I vs. w^(1/2)图形中,曲线向横坐标方向偏离,这种情况说明什么问题呢?
回复此楼
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

xmuxiaoyu

金虫 (著名写手)


it is probably that electrochemical reaction does not control by mass transfer at high rate, the reaction was controlled by electron transfer at electrode surface
2楼2008-01-23 21:55:55
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

syb

银虫 (小有名气)

"it is probably that electrochemical reaction does not control by mass transfer at high rate, the reaction was controlled by electron transfer at electrode surface "

If the reaction is controlled by electron transfer as you said, the I~V relation must obey the Tafel formula. Obscurely, I saw a flat current in the I vs. E curve, which was not follow the Tafel relation. Now, what dose this "diffusion current" mean?
3楼2008-01-23 22:57:13
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

xmuxiaoyu

金虫 (著名写手)


o, sorry. I don't n know in this situation
4楼2008-01-23 23:13:34
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 syb 的主题更新
普通表情 高级回复 (可上传附件)
信息提示
请填处理意见