自然科学版 英文版
自然科学版 英文版
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中南大学学报(英文版)

Journal of Central South University

Vol. 15    No. 2    April 2008

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Electrocatalytic oxidation behavior of L-cysteine at Pt microparticles modified nanofibrous polyaniline film electrode
MA Song-jiang(马淞江)1, LUO Sheng-lian(罗胜联)2,ZHOU Hai-hui(周海晖)2, KUANG Ya-fei(旷亚非)2, NING Xiao-hui(宁晓辉)2

1.College of Chemistry and Chemical Engineering, Hunan University of Science and Technology,Xiangtan 411201, China;2. College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China

Abstract:Platinum(Pt)/nanofibrous polyaniline(PANI) electrode was prepared by pulse galvanostatic method and characterized by scanning electron microscopy. The electrochemical behavior of L-cysteine at the Pt/nanofibrous PANI electrode was investigated by cyclic voltammetry. The results indicate that the pH value of the solution and the Pt loading of the electrode have great effect on the electrocatalytic property of the Pt /nanofibrous PANI electrode; the suitable Pt loading of the electrode is 600 μg/cm2 and the suitable pH value of the solution is 4.5 for investigating L-cysteine oxidation. The L-cysteine sensor based on the Pt/nanofibrous PANI electrode has a good selectivity, reproducibility and stability. The Pt/nanofibrous PANI electrode is highly sensitive to L-cysteine, and the linear calibration curve for the oxidation of L-cysteine can be observed in the range of 0.2−5.0 mmol/L.

 

Key words: electrocatalytic oxidation; electrode; polyaniline; platinum; L-cysteine; nanofibre

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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