The nano - sno2 electrode was used as bioelectrochemical sensor in chronoamperometry to count fastly e . coli with the advantages of quickness , simple operation and high sensitivity 實(shí)驗(yàn)結(jié)果表明,用該電極為工作電極,采用計(jì)時(shí)電流法能簡(jiǎn)便、快速、靈敏地對(duì)水體中的大腸桿菌進(jìn)行計(jì)數(shù)。
In the first part of this paper , mn ( iii ) / mn ( ii ) couple in h2so4 was firstly applied as the positive couple to this system , i . e . redox flow cell . its chemical , electrochemical properties , redox kinetics and related parameters were characterized and discussed by rotating disc electrode ( rde ) , cyclic voltammetry ( cv ) , a . c . impedance ( a . c . imp ) , chronoamperometry , tafel curve , and galvanostatic charge / discharge techniques . conclusions have been drawn as follows : 1 . the electrochemical kinetics of mn ( iii ) / mn ( ii ) redox couple in 6 . 3m h2so4 solution were studied by means of rotating disc electrode ( rde ) technique on platinum electrode 本文第一部分首次成功地將酸性介質(zhì)中的mn ( iii ) / mn ( ii )電對(duì)應(yīng)用于氧化還原液流電池這一新型儲(chǔ)能裝置的正極活性材料,通過(guò)旋轉(zhuǎn)圓盤(pán)( rde ) 、循環(huán)伏安( cv ) 、交流阻抗( a . c . imp ) 、恒電位階躍、 tafel實(shí)驗(yàn)以及mn ( iii ) / mn ( ii )單電極的恒流充放電實(shí)驗(yàn),我們得出以下結(jié)論: 1 .在旋轉(zhuǎn)圓盤(pán)電極上,不同轉(zhuǎn)速范圍,不同的極化過(guò)電位, mn ( ) / mn ( )體系氧化還原電極過(guò)程的控制步驟不同,電荷傳遞、擴(kuò)散傳質(zhì)可分別或聯(lián)合成為控制步驟。
Chronoamperometry is an electrochemical technique in which the potential of the working electrode is stepped and the resulting current from faradic processes occurring at the electrode (caused by the potential step) is monitored as a function of time. Limited information about the identity of the electrolyzed species can be obtained from the ratio of the peak oxidation current versus the peak reduction current.