...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry >DNA-Cu(II) complex as a novel electrocatalyst for a hydrogen peroxide sensor
【24h】

DNA-Cu(II) complex as a novel electrocatalyst for a hydrogen peroxide sensor

机译：DNA-Cu（II）配合物作为过氧化氢传感器的新型电催化剂

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A DNA-Cu(II) complex was effectively utilized as a novel electrocatalyst for an H2O2-sensing electrode. The DNA-Cu(II) complex was immobilized onto the surface of a glassy carbon (GC) electrode by polyion complex formation with poly(allylamine) (PAA). Cyclic voltammetry revealed that the copper ion embedded in the DNA/PAA layer exhibited a pair of well-defined redox peaks which is due to the Cu(II)/Cu(I) redox couple. The resulting DNA-Cu(II)/PAA/GC electrode showed excellent electrocatalytic activity for H2O2 reduction. The amperometric response to H2O2 obtained at -0.2 V (vs. AgAgCl) was rapid and highly sensitive. A calibration curve obtained in air-saturated buffer (pH 5) was linear in the concentration range from 0.1 to 135 muM with a detection limit of 0.05 muM (S/N = ca. 3). Moreover, this sensor showed long term-storage stability of more than 30 days under dry conditions 4 degreesC. (C) 2004 Elsevier B.V. All rights reserved.
机译：DNA-Cu（II）配合物被有效地用作H2O2传感电极的新型电催化剂。通过与聚烯丙胺（PAA）形成聚离子络合物将DNA-Cu（II）络合物固定在玻璃碳（GC）电极的表面上。循环伏安法表明嵌入在DNA / PAA层中的铜离子表现出一对明确定义的氧化还原峰，这归因于Cu（II）/ Cu（I）氧化还原对。所得的DNA-Cu（II）/ PAA / GC电极对H2O2的还原显示出优异的电催化活性。在-0.2 V（vs. Ag AgCl）下获得的对H2O2的安培响应快速且高度灵敏。在空气饱和缓冲液（pH 5）中获得的校准曲线在0.1至135μM的浓度范围内呈线性，检出限为0.05μM（S / N =约3）。而且，该传感器在4℃的干燥条件下显示出超过30天的长期存储稳定性。 （C）2004 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号