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Citation: PU Wen-Hong, HUANG Jin-Tao, QIAN Gong-Ming, ZHANG Jing-Dong, Munetaka Oyama, GUI Juan, YANG Chang-Zhu. Construction of Platinum Nanoparticles-attached Glassy Carbon Electrode and Its Electrocatalytic Activity for L-Cysteine[J]. Chinese Journal of Applied Chemistry, ;2007, 24(8): 868-872. shu

Construction of Platinum Nanoparticles-attached Glassy Carbon Electrode and Its Electrocatalytic Activity for L-Cysteine

1.
a School of Environmental Science & Engineering, Huazhong University of science and Technology, Wuhan 430074;
2.
b Division of Research Initiatives, International Innovation Center, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan

Corresponding author: YANG Chang-Zhu,
Received Date: 31 August 2006
Available Online: 8 November 2006

A novel glassy carbon electrode modified with spherical platinum nanoparticles was prepared by means of a one-step in situ chemical reduction growth method.Electrochemical method SEM and EDS for surface analysis were employed to characterize the platinum nanparticles modification on the electrode surface.The comparison of the electrochemical properties of bare glassy carbon electrode,platinum nanoparticles-modified electrode and bulk platinum electrode is performed.The surface coverage rate (1.28×10^-7 mol/cm²) of platinum on glassy carbon electrode was calculated based on the linear relationship between peak current of Pt and scan rate.The results show that the modified electrode exhibited an effective response to the oxidation of L-Cysteine.Compared with that of Pt bulk electrode,the electrocatalytic oxidation potential of L-Cysteine on modified electrode has shifted negatively by 0.3 V with a remarkable enhancement in oxidation peak current.The linear relationship existed between the L-Cysteine concentration and the catalytic peak current in a range of 1.0×10^-7 mol/L to 1.0×10^-5 mol/L at the modified electrode.
- one-step in situ chemical reduction growth,
- Pt nanoparticles,
- L-Cysteine,
- glassy carbon
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