2-吡啶甲酸在玻碳电极表面的电化学行为
Electrochemical Behavior of 2-Picolinic Acid on Glassy Carbon Electrode
摘 要
在乙酸-乙酸钠缓冲溶液中,利用循环伏安法与线性扫描伏安法研究了2-吡啶甲酸在玻碳电极上的电化学行为。通过数值拟合,确定了2-吡啶甲酸在不同酸度下离解状态的分布,探讨了扫描速率、浓度等因素对其电化学特性的影响,并对其在玻碳电极表面的电极反应机理进行了推断。研究结果表明,2-吡啶甲酸在玻碳电极上发生的是一个不可逆的电化学还原反应,电极过程表现为吡啶环上的羧基的电化学还发生两个电子的转移生成醛。
电化学行为
玻碳电极
伏安法
2-Picolinic acid
Electrochemical behavior
Glassy carbon electrode
Voltammetry
Abstract
In an acetate buffer solution, the electrochemical behavior of 2-picolinic acid at glassy carbon electrode was studied by cyclic voltammetry and linear sweeping voltammetry. Distribution of various forms of dissociation of 2-picolinic acid in media of different pH was confirmed based on numerical fitting; and influences of scanning rate and concentration on electrochemical characteristics were discussed. Besides, the mechanism of the reaction of 2-picolinic acid at glassy carbon electrode was deduced. It was found that the reaction of 2-picolinic acid at glassy carbon electrode was an irreversible reduction process, showing the reduction of the carboxy group attached to the pyridyl ring to aldehyde group through transferring of 2 electrons.
中图分类号 O657
所属栏目 试验与研究
基金项目 浙江省科技厅公益项目/分析测试基金(2009F70001;2012C37014);浙江省重点科技创新团队(2011R09002-12)资助
收稿日期 2011/12/26
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备注张普信(1985-),男,河南信阳人,硕士研究生,从事分析化学光谱电化学分析研究。
引用该论文: ZHANG Pu-xin,LIU Wen-han,TENG Yuan-jie,YAO Jian-hua,MA Chun-an. Electrochemical Behavior of 2-Picolinic Acid on Glassy Carbon Electrode[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2013, 49(4): 382～385
张普信,刘文涵,滕渊洁,姚建花,马淳安. 2-吡啶甲酸在玻碳电极表面的电化学行为[J]. 理化检验－化学分册, 2013, 49(4): 382～385
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参考文献
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【7】马淳安,胡义娇,徐颖华.3,4,5,6-四氯-2-三氯甲基吡啶在Ag电极上的电还原行为［J］.电化学, 2008,14(3):254-257.
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【9】刘永明,李桂芝.维生素B12在玻碳电极上的伏安行为及测定［J］.分析化学, 2004,32(9):1182-1184.
【10】黄桃,陈声培,周志有,等.草酸在铅电极上电催化还原过程的原位FTIRS研究［J］.光谱学与光谱分析, 2008,28(3):547-550.
【2】PARK S M, KIM K, KIM M S. Adsorption of picolinic and nicotinic acid on a silver sol surface investigated by Raman spectroscopy［J］. Journal of Molecular Structure, 1995,344:195-203.
【3】LIANG Y, NADA L K, SALA O. Polarizability and concentration effects on the raman spectra of picolinic acid species in aqueous solution［J］. Journal of Molecu-lar Structure, 2000,554:271-277.
【4】WEN Rui, FANG Yan. Adsorption of pyridine carboxylic acid on silver surface investigated by potential-dependent SERS［J］. Vibrational Spectroscopy, 2005,39:106-113.
【5】BARTHELMES J, PLIETH W. SERS investigations on the adsorption of pyridine carboxylic acids on silver-influence of pH supporting electrolyte［J］. Elecrtrochimica Acta, 1995,15(40):1487-2490.
【6】杨志,田森林,李英杰.典型表面活性剂在玻碳电极上的电化学行为及吸附模式［J］.化学研究与应用, 2010,22(12):1583-1586.
【7】马淳安,胡义娇,徐颖华.3,4,5,6-四氯-2-三氯甲基吡啶在Ag电极上的电还原行为［J］.电化学, 2008,14(3):254-257.
【8】刘文涵,王丽丽,李祖光,等.数值拟合研究原子吸收间接测定谷氨酸的机理［J］.浙江工业大学学报, 2004,32(6):615-619.
【9】刘永明,李桂芝.维生素B12在玻碳电极上的伏安行为及测定［J］.分析化学, 2004,32(9):1182-1184.
【10】黄桃,陈声培,周志有,等.草酸在铅电极上电催化还原过程的原位FTIRS研究［J］.光谱学与光谱分析, 2008,28(3):547-550.
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