嵌入式超薄碳膜电极的伏安行为及其应用  

Voltammetric Behavior of Embedded Super-thinCarbon Film Electrode and Its Application

作　　者：汪振辉[1] 李志果[1] 周漱萍[1] 

机构地区：[1]河南师范大学化学与环境科学学院,河南省高校环境科学与工程重点学科开放实验室,新乡453002

出　　处：《分析化学》2005年第4期523-526,共4页Chinese Journal of Analytical Chemistry

基　　金：河南省自然科学基金(No. 0311021000);'河南省高校环境科学与工程重点学科开放实验室资助项目

摘　　要：以镍铬合金为基体,在其表面嵌入碳膜或碳纳米管,制备了超薄碳膜电极,并用于酚磺乙胺(ETA)的测定.超薄碳膜电极对ETA有良好的电催化作用和增敏作用,与玻碳电极相比,氧化峰电位负移120 mV,还原峰电位正移160 mV,电流响应明显增大.在最优条件下,ETA浓度在5×10-7～9×10-6 mol/L和9×10-6～6×10-5 mol/L之间与其氧化峰电流呈良好的线性关系,相关系数分别为0.9967和0.9979.该电极制备简便,价格低廉,用于酚磺乙胺的测定结果令人满意.A super-thin carbon film electrode (ESCFE) embedded with graphite powder and carbon nanotube at a fundus of nickel-chromium was prepared. The ESCFE exhibited an excellent electrocatalytic activity toward ethamsylate redox and marked enhancement of the current response. The oxidation over-potential of ethamsylate at the electrode was reduced by 120 mV, and the reduction over-potential by 160 mV compared with bare glassy carbon electrode. The oxidation peak current was proportional to the concentration of ethamsylate over the range of 5 x 10(-7) ∼ 9 x 10(-6) mol/L and 9 x 10(-6) ∼ 6 x 10(-5) mol/L under the optimum conditions. The correlation coefficient was 0. 9966 and 0. 9979 respectively. The detection limit was estimated as 8 x 10(-9) mol/L. The electrode was prepared easily and showed a good stability.

关 键 词：膜电极 伏安行为 超薄 嵌入式 应用 电催化作用 镍铬合金 碳纳米管 增敏作用 玻碳电极 电流响应 最优条件 线性关系 相关系数 电极制备 测定结果 ETA 峰电位 电极对 峰电流 碳膜 乙胺 氧化 表面 

分 类 号：O657.1[理学—分析化学]