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Citation: ZHANG Yan-Jun, FANG Xin, WANG Jian, WANG Jun-Dong. Carbon Paste Electrode Incorporating Multi-walled Carbon Nanotube/α-(2,4-Di-tert-butylphenoxy) phthalocyan-inatocobalt for Determination of L-cysteine[J]. Chinese Journal of Applied Chemistry, ;2008, 25(8): 909-912. shu

Carbon Paste Electrode Incorporating Multi-walled Carbon Nanotube/α-(2,4-Di-tert-butylphenoxy) phthalocyan-inatocobalt for Determination of L-cysteine

1.
College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350002

Corresponding author: WANG Jun-Dong,
Received Date: 16 August 2007
Available Online: 24 December 2007
Fund Project: 福建省科技厅资助项目(2006F5058) (2006F5058)

A modified carbon paste electrode modified by multi-walled carbon nanotube and α-(2,4-Di-tert-butylphenoxy) phthalocyaninatocobalt towards the electrocatalytic oxidation of L-cysteine was studied. The α-(2,4-Di-tert-butylphenoxy) phthalocyaninatocobalt modified carbon paste electrode showed an excellent electrocatalytic activity to L-cysteine and lowered the anodic oxidation potential. The current signal and the sensitivity were enhanced after multi-walled carbon nanotube was added to the modified electrode. A mixture of graphite powder with 10% of multi-walled carbon nanotube was applied to the preparation of carbon paste. The modified carbon paste electrode had a maximum sensitivity to current signal for L-cysteine. Amperometric response was detected in the stiring solution. The steady-state current quickly reached a stable value in less than 5 s. The sensitivity of the electrode was 84.4 nA·cm^-2/(μmol·L^-1), and the limit of detection was 5.0×10^-6 mol/L.
- carbon nanotube,
- L-cysteine,
- carbon paste,
- α-(Di-tert-butylphenoxy) phthalocyaninatocobalt
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