分析测试学报2012，Vol.31Issue(2)：174-179,6.DOI:10.3969/j.issn.1004-4957.2012.02.011
Keggin型磷钨酸/2-氨基吡啶聚合膜修饰电极的电化学性质及对维生素B2的电催化
Investigation of Electrochemical Properties of Keggin-type Phosphotungstic Acid/2-Amino Pyridine Electropolymerized Modified Electrode and Its Electrocatalysis Towards Vitamin B2
摘要
Abstract
A novel Keggin-type phosphotungstic acid H7[P( W207)6]/2-amino pyridine electropoly-merization ( PW/PAP) modified glassy carbon electrode was fabricated by electrodepositing H7 [ P (W2O7)6] onto 2-amino pyridine electro-polymerized glassy carbon electrode. The electrochemical behaviors of PW/PAP modified electrode were investigated by cyclic voltammetry. It is found that there are three redox peaks appeared in the potential range from - 0. 8 V to 0. 2 V in BR buffer solution. The modified electrode showed a good electrocatalysis towards the electro-oxidation of vitamin B2 (VB2). The electrochemical behavior of VB2 was surface-controlled. The electron transfer coefficient and rate constant were calculated to be 0. 357 and 0. 042 s-1, respectively, indicating that the electrochemical reaction of VB2 was a quasi-reversible process. Under the optimal conditions, there was a good linear relationship between the peak currents and VB2 concentrations in the concentration range of 2.4 x 10-6 -1.0 x 10-4 mol/L and 1.0 X10-4 -5. 5 x 10-4 mol/L, with a detection limit of 1.4 x 10-6 mol/L. The composite electrode had good stability and reproducibility, and was used in the determination of VB2 in composite vitamin tablets with satisfactory results.关键词
磷钨酸/2-氨基吡啶电聚合膜/维生素B2/电化学催化Key words
phosphotungstic acid/2-amino pyridine electropolymerized film/ vitamin B2/ electrocatalysis分类
化学化工引用本文复制引用
刘传银,高川..Keggin型磷钨酸/2-氨基吡啶聚合膜修饰电极的电化学性质及对维生素B2的电催化[J].分析测试学报,2012,31(2):174-179,6.基金项目
湖北省自然科学基金(2011CDB321) （2011CDB321）
十堰市科技与开发计划(2010nt05) （2010nt05）
襄樊学院教学研究项目(JY201145,hyjy201102) （JY201145,hyjy201102）
