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sscc589金虫 (小有名气)
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[交流]
【求助】关于循环伏安的问题
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看有些文献说,从循环伏安图可以得到过电位,请问怎么从图中得到那个过电位. 顺便问下得到过电位还有其它方法吗? 谢谢 |
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sscc589
金虫 (小有名气)
- 应助: 0 (幼儿园)
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- 专业: 金属材料的制备科学与跨学
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If we define the nucleation overpotential, gdep("gdep"表示的是过电位符号,粘贴不过来) , as the difference between a potential corresponding to the foot of the reduction wave (inset of Fig. 1) and the equilibrium potential,i.e., E = 0 V vs Ag/Ag+, the jgdepj("jgdepj "表示过电位绝对值)for the first and second scans are 126 and 42 mV, respectively. Equilibrating the electrode at the turning potential (0.5 V in Fig. 1) strongly influences the nucleation overpotential for silver. 我想知道:.这个平衡电位他说是0.是在仪器上度出来的还是自己标定的; 126 ,42 mV怎么得到的,文中直接给出这个结果,上面这句不是很懂,能翻译解释下就太感谢了.谢谢楼上各位的热情帮助 |
15楼2009-09-24 18:15:29
3楼2009-09-23 19:46:57
4楼2009-09-23 20:34:00
sscc589
金虫 (小有名气)
- 应助: 0 (幼儿园)
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- 帖子: 245
- 在线: 56.2小时
- 虫号: 478006
- 注册: 2007-12-14
- 性别: GG
- 专业: 金属材料的制备科学与跨学
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谢谢楼上各位的帮忙 请问楼上的式电位是不是标准电极电位?我把相关文献贴出来,请楼上各位帮我看看 Cyclic voltammetry (CV) of AgClO4 was examined in CH3CN + 0.1 M LiClO4, with GC as working electrode and a silver wire directly immersed in the electrolytic solution as reference electrode. Fig. 1 shows two successive cyclic voltammograms, displaying the characteristic features of diffusion-controlled electrodeposition in the cathodic branch and stripping of the metal from the electrode surface in the anodic branch. The reduction peak in scan 2 is positively shifted with respect to the first scan. If we define the nucleation overpotential, gdep, as the difference between a potential corresponding to the foot of the reduction wave (inset of Fig. 1) and the equilibrium potential, i.e., E = 0 V vs AgjAg+, the jgdepj for the first and second scans are 126 and 42 mV, respectively. Equilibrating the electrode at the turning potential (0.5 V in Fig. 1) strongly influences the nucleation overpotential for silver. |
5楼2009-09-24 09:13:31