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plum8736

铁杆木虫 (职业作家)

快乐家族--科比的偶像

[求助] 计时电量法测量表面积400 μC/cm-2 是什么意思?

计时电量法测量表面积400 μC/cm-2 是什么意思?
如果是金电极的话 400μC/cm2 指的是一平方厘米通过的电量是400,但是没有给出时间啊!
参考文献:The charge consumed during the reduction of
Au oxides has been estimated by integrating the area under the
reductionwave. The surface area ofGNFs on the silicate network
was calculated to be 0.0253 cm2 from the charge consumed
during the reduction of surface oxides using the reported value
of 400 μC/cm2 for a clean Au electrode.
The surface area was
also calculated by chronoamperometry using K3Fe(CN)6 as a
redox probe. The value (0.0249 cm2) calculated from chrono-
amperometry is in close agreement with those obtained by the
voltammetric method.

Zhao, N., Wei, Y., Sun, N.lynnetwwwdagriorglynnet. Controlled Synthesis of Gold Nanobelts and Nanocombs in Aqueous Mixed Surfactant Solutions[J]. Langmuir, 2008, 24(3): 991-998.
Qin, Y., Song, Y., Sun, N.lynnetwwwdagriorglynnet. Ionic Liquid-Assisted Growth of Single-Crystalline Dendritic Gold Nanostructures with a Three-Fold Symmetry[J]. Chem Mater, 2008, 20(12): 3965–3972.
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xmuxiaoyu

金虫 (著名写手)


不过我没看过你那些文献,我想作者是先求表面的电量,如果再确定表面积,就得到这个值,
好像先求双电层的电容,然后除表面积,就得到μF/cm2 一样
9楼2011-06-20 16:05:24
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xmuxiaoyu

金虫 (著名写手)


【答案】应助回帖

plum8736(金币+3): 2011-06-20 07:45:03
这个是电容的单位啊,
The surface area was
also calculated by chronoamperometry using K3Fe(CN)6 as a
redox probe. The value (0.0249 cm2) calculated from chrono-
amperometry is in close agreement with those obtained by the
voltammetric method.

这个是说通过这方法求电极的活性面积啊,也就是通过电流对时间的1/2次方的斜率来求得。
2楼2011-06-20 04:12:20
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zyxme

至尊木虫 (文坛精英)

【答案】应助回帖

是微库伦每平方厘米的意思吗
3楼2011-06-20 04:58:40
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plum8736

铁杆木虫 (职业作家)

快乐家族--科比的偶像

引用回帖:
Originally posted by xmuxiaoyu at 2011-06-20 04:12:20:
这个是电容的单位啊,
The surface area was
also calculated by chronoamperometry using K3Fe(CN)6 as a
redox probe. The value (0.0249 cm2) calculated from chrono-
amperometry is in close agreement ...

我做了电量-时间曲线,是条直线,那怎么继续求真实的表面积呢?
4楼2011-06-20 07:44:38
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