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Citation: DENG Xiang-Hui, KAN Xian-Wen, YU Yan, ZHANG Wen-Zhi, LIU Hong-Ying, FANG Bin. Electrochemical and Catalytic Properties of Ferrocene/L-cysteine Modified Electrode[J]. Acta Physico-Chimica Sinica, ;2005, 21(12): 1399-1402. doi: 10.3866/PKU.WHXB20051214 shu

Electrochemical and Catalytic Properties of Ferrocene/L-cysteine Modified Electrode

1.
College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000

Received Date: 12 April 2005
Available Online: 15 December 2005

Stable electrode modified by aminylferrocene/L-cysteine(L-Cys) was fabricated successfully by linking aminylferrocene to L-Cys self-assembled monolayer(SAM) with coupling reagent. The modified electrode exhibits a pair of reversible redox peaks in pH 7.0 phosphate buffer solution. The electrochemical behaviors of the modified electrode were explored in detail with cyclic voltammetry and a.c. impedance. The apparent electron transfer coefficient and standard rate constant were calculated to be 0.66 and 6.86 s-1 for the modified electrode respectively. The modified electrode shows electrocatalytic activity for oxidation of epinephrine (EP) in pH 7.0 phosphate buffer solution. The peak current was proportional to the concentration of EP in the range of 2.0×10-7～1.0×10-5 mol·dm-3.
- Aminylferrocene; L-cysteine;Self-assembled monolayer;Electrocatalysis;Epinephrine
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