Study of electron transfer across the liquid/ice-like matrix interface by scanning electrochemical microscopy
文献类型：期刊论文
| 作者 | Zhang ZQ ; Ye JY ; Sun P ; Yuan Y ; Tong YH ; Hu JM ; Shao YH |
| 刊名 | analytical chemistry
 |
| 出版日期 | 2002 |
| 卷号 | 74期号:7页码:1530-1536 |
| 关键词 | COMPOSITE POLYMER MEMBRANES LIQUID/LIQUID INTERFACE ION TRANSFER CONCENTRATION PROFILES POTENTIAL DEPENDENCE EXPANDING DROPLETS FORCE MICROSCOPY CHARGE-TRANSFER TRANSFER RATES ICE |
| ISSN号 | 0003-2700 |
| 通讯作者 | shao yh |
| 中文摘要 | in this work, we report the findings of a study on scanning electrochemical microscopy (secm) to investigate the interfacial electron-transfer (et) reaction between the 7,7,8,8-tetracyanoquinodimethane radical anion (tcnq(.-)) in 1,2-dichloroethane and ferricyanide in an ice-like matrix (a mixture of insulting ice and conductive liquid) under low temperatures. experimental results indicate that the formed liquid/ice-like matrix interface is superficially similar in electrochemical characteristics to a liquid/liquid interface at temperatures above -20 degreesc. furthermore, imaging data show that the surface of the ice-like matrix is microscopically flat and physically stable and can be applied as either a conductive or an insulting substrate for secm studies. perchlorate ion was selected as the common ion in both phases, the concentrations of which controlled the interfacial potential difference. the effect of perchlorate concentration in the dce phase on interfacial reactions has been studied in detail. the apparent heterogeneous rate constants for tcnq(.-) oxidation by fe(cn)(6)(3-) in another phase under different temperatures have been calculated by a best-fit analysis, where the experimental approach curves are compared with the theoretically derived relationships. reaction rate data obey butler-volmer formulation before and after the freezing point, which is similar to most other known cases of et reactions at liquid/liquid interfaces. however, there is a sharp change observed for heterogeneous rate constants around the freezing point of the aqueous phase, which reflects the phase transition. at temperatures below -20 degreesc, surface-confined voltammograms for the reduction of ferricyanide were obtained, and the ice-like matrix became an insulating one, which indicates that the aqueous phase is really a frozen phase. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000174841600019 |
| 公开日期 | 2010-11-03 |
| 源URL | [http://202.98.16.49/handle/322003/18689]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Zhang ZQ,Ye JY,Sun P,et al. Study of electron transfer across the liquid/ice-like matrix interface by scanning electrochemical microscopy[J]. analytical chemistry,2002,74(7):1530-1536. |
| APA | Zhang ZQ.,Ye JY.,Sun P.,Yuan Y.,Tong YH.,...&Shao YH.(2002).Study of electron transfer across the liquid/ice-like matrix interface by scanning electrochemical microscopy.analytical chemistry,74(7),1530-1536. |
| MLA | Zhang ZQ,et al."Study of electron transfer across the liquid/ice-like matrix interface by scanning electrochemical microscopy".analytical chemistry 74.7(2002):1530-1536. |
入库方式： OAI收割
来源：长春应用化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。