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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 >Comparative studies on the electrochemiluminescence of the luminol system at a copper electrode and a gold electrode under different transient-state electrochemical techniques
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Comparative studies on the electrochemiluminescence of the luminol system at a copper electrode and a gold electrode under different transient-state electrochemical techniques

机译：不同瞬态电化学技术下鲁米诺体系在铜电极和金电极上的化学发光比较研究

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摘要

The electrochemiluminescence (ECL) and amperometric behaviors of the luminol system at a copper electrode and at a gold electrode were studied under different transient-state electrochemical techniques such as linear sweep voltammetry, normal pulse voltammetry, differential pulse voltammetry, chronoamperometry and cyclic-square potential. Under linear sweep voltammetry, normal pulse voltammetry and differential pulse voltammetry, three and one ECL peaks were obtained at a gold electrode and at a copper electrode, respectively. The ECL intensity, peak number and peak potential were well comparable with each electrochemical technique. Under chronoamperometry and cyclic-square potential, only one ECL peak was found and the ECL intensity decreased as the pulse potentials became more positive at a copper electrode with chronoamperometry, whereas, the ECL intensity increased as the pulse potentials became more positive at a gold electrode. Moreover, at a gold electrode, chronoamperometry and cyclic-square potential under high potentials show higher ECL sensitivity than other three techniques mentioned above. The repetitions of the ECL responses from pulse to pulse at both electrodes were observed under normal pulse voltammetry, differential pulse voltammetry and cyclic-square potential. The mechanisms for these ECL peaks were proposed due to the reactions of luminol radical anion formed by electro-oxidation of luminol with various electrogenerated oxygen-containing species such as O-2, gold oxides, and O-2(•-) at different potentials. These studies on luminol electrochemiluminescence under different electrochemical techniques may be valuable for expanding the field and application of electrochemiluminescence reactions, especially for enriching the explanations of the mechanism of luminol electrochemiluminescence. © 2005 Elsevier B.V. All rights reserved.
机译：研究了鲁米诺系统在铜电极和金电极上的电化学发光（ECL）和安培行为，该研究采用了不同的瞬态电化学技术，例如线性扫描伏安法，正脉冲伏安法，微分脉冲伏安法，计时电流法和循环平方电势。在线性扫描伏安法，正常脉冲伏安法和差分脉冲伏安法下，分别在金电极和铜电极上获得三个和一个ECL峰。 ECL强度，峰数和峰电位可与每种电化学技术很好地比较。在计时电流法和循环平方电势下，只有计时电流法在铜电极上发现一个ECL峰，并且随着脉冲电位变得更正，ECL强度降低，而在金电极上，随着脉冲电位变得更正，ECL强度增加。 。此外，在金电极上，计时电流法和高电位下的循环平方电位显示出比上述其他三种技术更高的ECL灵敏度。在正常脉冲伏安法，差分脉冲伏安法和循环平方电势下，观察到两个电极上脉冲之间的ECL响应重复。提出了这些ECL峰的机理，这是由于鲁米诺与各种电生成的含氧物质（例如O-2，金氧化物和O-2（＆BULL ;-)）在不同的电氧化作用下形成的鲁米诺自由基阴离子反应而提出的。潜力。这些关于在不同电化学技术下的鲁米诺电化学发光的研究对于扩大电化学发光反应的领域和应用，特别是丰富对鲁米诺电化学发光机理的解释可能是有价值的。 ＆复制; 2005 Elsevier B.V.保留所有权利。

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