| 查看: 1917 | 回復(fù): 19 | ||
[求助]
菜鳥求救:請(qǐng)教一個(gè)關(guān)于工作電極和反電極的問(wèn)題
|
|
我要對(duì)一個(gè)導(dǎo)電高聚物通過(guò)加正電壓和負(fù)電壓來(lái)發(fā)實(shí)現(xiàn)其氧化態(tài)和還原態(tài)的反復(fù)轉(zhuǎn)變。查到文獻(xiàn)是用如下方法實(shí)現(xiàn)的: Electrochemical switching and EIS measurements were performed using a two-electrode configuration, with the working and counter electrodes attached to opposite ends of the sample, which had a typical size of 1.5 cm × 1.5 cm. The reference and counter electrodes were shorted as is typically done for two-electrode impedance measurements. The working and counter electrodes were interfaced onto the surface of the sample through thin strips of highly conductive copper metal (sheet resistance ∼1 Ohm), dimensions 3 mm × 10 mm × 0.1 mm.The material was switched to its reduced state by application of a − 1.0 V potential to the working electrode, for an appropriate period of time until a charge of ∼ 0.1 C had been passed. 但我還是沒有搞清楚,有如下的疑問(wèn),希望知道的蟲子能解答多少是多少: (1)工作電極和反電極是分別做在樣品同一個(gè)表面上的兩端嗎? (2)當(dāng)對(duì)工作電極加-1.0V電壓的時(shí)候,反電極的電壓不是應(yīng)該是 +1.0V 嗎?那么正負(fù)電壓都同時(shí)加到樣品上了,如何會(huì)實(shí)現(xiàn)樣品從氧化態(tài)到還原態(tài)呢? (3)如果我要實(shí)現(xiàn)從還原態(tài)再回到到達(dá)氧化態(tài),就在工作電極加+1.0V的電壓就可以了嗎? (4) 我設(shè)想如果把樣品一個(gè)表面連到工作電極上,而樣品的另個(gè)表面貼一層固體電解質(zhì),在固體電解質(zhì)上再貼一層非常導(dǎo)電的材料并將導(dǎo)電材料連到反電極上,在工作電極上加+1v或-1v的電壓是否也可以實(shí)現(xiàn)樣品的氧化還原態(tài)轉(zhuǎn)換? [ Last edited by ZANCAI on 2012-6-5 at 02:45 ] |
![]() ![]() |
新蟲 (初入文壇)
![]() ![]() |
鐵桿木蟲 (小有名氣)
|
不能這么說(shuō),只能說(shuō)如果在工作電極上施加+1V的電位,工作電極上發(fā)生氧化反應(yīng),則對(duì)電極上應(yīng)該要發(fā)生還原反應(yīng),且還原反應(yīng)電流要與氧化反應(yīng)電流相一致。但是對(duì)電極上的還原電位是不確定的,因?yàn)榭梢韵胂螅瑢?duì)電極上發(fā)生的極化反應(yīng)是要滿足工作電極上需要的電流的,因此工作電極上的電流變化也會(huì)導(dǎo)致對(duì)電極上的電位變化?偨Y(jié)起來(lái)就是:工作電極和對(duì)電極相匹配的不是電位,而是電流。 |
鐵桿木蟲 (小有名氣)
|
從“ The working and counter electrodes were interfaced onto the surface of the sample through thin strips of highly conductive copper metal”一句中判斷應(yīng)該是這樣。但是這好像與一般的電化學(xué)反應(yīng)有很大的不同,我不理解這樣做好像是把導(dǎo)電高聚物當(dāng)作一個(gè)電解池,但是當(dāng)施加一個(gè)高電位氧化時(shí),氧化反應(yīng)所需要的物種從何而來(lái)?不會(huì)只是電子的得失吧?樓主能否上全文?或者文獻(xiàn)的題目也行。 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研]
|
.6lL 2026-03-18 | 6/300 |
|
|---|---|---|---|---|
|
[考研] 求調(diào)劑,一志愿:南京航空航天大學(xué)大學(xué) ,080500材料科學(xué)與工程學(xué)碩,總分289分 +3 | @taotao 2026-03-19 | 3/150 |
|
|
[考研] 0703化學(xué)調(diào)劑 +8 | 妮妮ninicgb 2026-03-15 | 12/600 |
|
|
[考研] 0703化學(xué)調(diào)劑,求各位老師收留 +10 | 秋有木北 2026-03-14 | 10/500 |
|
|
[考研] 298-一志愿中國(guó)農(nóng)業(yè)大學(xué)-求調(diào)劑 +7 | 手機(jī)用戶 2026-03-17 | 7/350 |
|
|
[考研] 280求調(diào)劑 +6 | 咕嚕曉曉 2026-03-18 | 7/350 |
|
|
[考研] 265求調(diào)劑 +3 | 梁梁校校 2026-03-17 | 3/150 |
|
|
[考研] 293求調(diào)劑 +11 | zjl的號(hào) 2026-03-16 | 16/800 |
|
|
[考研] 268求調(diào)劑 +7 | 好運(yùn)連綿不絕 2026-03-12 | 8/400 |
|
|
[考研] 290求調(diào)劑 +3 | p asserby. 2026-03-15 | 4/200 |
|
|
[考研]
|
zhouzhen654 2026-03-16 | 3/150 |
|
|
[考研] 藥學(xué)383 求調(diào)劑 +3 | 藥學(xué)chy 2026-03-15 | 4/200 |
|
|
[考研] 0854控制工程 359求調(diào)劑 可跨專業(yè) +3 | 626776879 2026-03-14 | 9/450 |
|
|
[考研] 318求調(diào)劑 +3 | Yanyali 2026-03-15 | 3/150 |
|
|
[考研] 中科院材料273求調(diào)劑 +4 | yzydy 2026-03-15 | 4/200 |
|
|
[考研] 070303 總分349求調(diào)劑 +3 | LJY9966 2026-03-15 | 5/250 |
|
|
[考研] 327求調(diào)劑 +6 | 拾光任染 2026-03-15 | 11/550 |
|
|
[考研] 26考研一志愿中國(guó)石油大學(xué)(華東)305分求調(diào)劑 +3 | 嘉年新程 2026-03-15 | 3/150 |
|
|
[考研] 招收0805(材料)調(diào)劑 +3 | 18595523086 2026-03-13 | 3/150 |
|
|
[碩博家園] 085600 260分求調(diào)劑 +3 | 天空還下雨么 2026-03-13 | 5/250 |
|