Electrochemical oxidation of histidine at an anodic oxidized boron-doped diamond electrode in neutral solution

Li Chia Chen, Chia Chin Chang, Hsien Chang Chang

研究成果: Article同行評審

32 引文 斯高帕斯(Scopus)

摘要

Electrochemical oxidation of histidine (His) at an anodic oxidized boron-doped diamond electrode (AOBDDE) was performed. A significant peak of His oxidation is observed at about +1.5 V vs. Ag/AgCl, however, the response current was inhibited due to strong His-oxidized product adsorption onto the electrode surface. The characteristics of the His-oxidized product adsorbed onto the electrode surface were investigated by studying the electrochemical behavior of the Fe(CN)64- redox reaction using cycle voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Both CV and EIS results showed a decrease in the sum of transfer coefficients and an increase in the electron transfer resistance, which indicate that the adsorption film is a non-conductive film. The most possible active site locations for the AOBDDE for His oxidation are within these low-lying polycrystallite AOBDDE surface regions. The results from Raman and X-ray photoelectron spectroscopy offer strong evidence of the imidazole ring reaction from His. Experiments confirmed that the adsorbed film can be removed and the electrode surface reactivated using brief polarization at +2.5 V.

原文English
頁(從 - 到)2883-2889
頁數7
期刊Electrochimica Acta
53
發行號6
DOIs
出版狀態Published - 2008 2月 15

All Science Journal Classification (ASJC) codes

  • 化學工程 (全部)
  • 電化學

指紋

深入研究「Electrochemical oxidation of histidine at an anodic oxidized boron-doped diamond electrode in neutral solution」主題。共同形成了獨特的指紋。

引用此