Electrocatalytic oxidation of kojic acid at a reduced graphene sheet modified glassy carbon electrode

doi:10.1016/j.jelechem.2011.11.004

	Electrocatalytic oxidation of kojic acid at a reduced graphene sheet modified glassy carbon electrode
	Wang, Yi1 ; Zhang, Dun 1; Wu, Jiajia1,2 ; Zhang, D (reprint author), Chinese Acad Sci, Inst Oceanol, Shandong Prov Key Lab Corros Sci, Qingdao 266071, Peoples R China.
	2012
发表期刊	JOURNAL OF ELECTROANALYTICAL CHEMISTRY
ISSN	1572-6657
卷号	664 页码:111-116
文章类型	Article
摘要	A simple procedure has been developed to prepare a glassy carbon (GC) electrode modified with reduced graphene sheets (RGSs) (RGSs/GC). The electrocatalytic oxidation of kojic acid on the RGSs/GC electrode in 0.2 M HAc-NaAc buffer solution has been studied using cyclic voltammetry and chronoamperometry. Compared with the unmodified GC electrode, a decrease in overpotential and large enhancement of oxidation current for kojic acid oxidation has been achieved with the RGSs/GC electrode. The kinetic parameters of the kojic acid oxidation reaction electrocatalyzed by RGSs have also been calculated. The diffusion coefficient of kojic acid has been estimated as 1.5 x 10(-5) cm(2) s(-1) for the experimental conditions, using chronoamperometry. The transfer coefficient for electron transfer and the number of electrons transferred in the overall reaction have been calculated to be 0.53 and 1, respectively. Under the optimized conditions, the oxidation peak current was proportional to kojic acid concentration in the range of 0.01-0.14 mM with a current sensitivity of 42.9 mu A mM(-1) and correlation coefficient of 0.9950, suggesting that RGSs are a potential electrode material for electrochemical sensors for kojic acid detection. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.
关键词	Reduced Graphene Sheets Electrocatalytic Oxidation Kojic Acid Kinetic Parameter Glassy Carbon
学科领域	Chemistry, Analytical ; Electrochemistry
DOI	10.1016/j.jelechem.2011.11.004
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000300816100017
引用统计	被引频次：25[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/12467
专题	海洋环境腐蚀与生物污损重点实验室
通讯作者	Zhang, D (reprint author), Chinese Acad Sci, Inst Oceanol, Shandong Prov Key Lab Corros Sci, Qingdao 266071, Peoples R China.
作者单位	1.Chinese Acad Sci, Inst Oceanol, Shandong Prov Key Lab Corros Sci, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Wang, Yi,Zhang, Dun,Wu, Jiajia,et al. Electrocatalytic oxidation of kojic acid at a reduced graphene sheet modified glassy carbon electrode[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY,2012,664:111-116.
APA	Wang, Yi,Zhang, Dun,Wu, Jiajia,&Zhang, D .(2012).Electrocatalytic oxidation of kojic acid at a reduced graphene sheet modified glassy carbon electrode.JOURNAL OF ELECTROANALYTICAL CHEMISTRY,664,111-116.
MLA	Wang, Yi,et al."Electrocatalytic oxidation of kojic acid at a reduced graphene sheet modified glassy carbon electrode".JOURNAL OF ELECTROANALYTICAL CHEMISTRY 664(2012):111-116.

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