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Citation: YUAN Zhong-Zhi, ZHOU Zhen-Tao, LI Wei-Shan. Cyclic Voltammetric Performance of Bi₂O₃ Particles on Abrasive Microelectrode[J]. Chinese Journal of Applied Chemistry, ;2004, 21(3): 251-255. shu

Cyclic Voltammetric Performance of Bi₂O₃ Particles on Abrasive Microelectrode

1.
a College of Material Science and Engineering, South China University of Technology, Guangzhou 510640;
2.
b Chemistry Department, South China Normal University, Guangzhou

Corresponding author: YUAN Zhong-Zhi,
Received Date: 4 June 2003
Available Online: 30 September 2003
Fund Project: 国家自然科学基金(20373016) (20373016)广东省自然科学基金(031533) (031533)广东省教育厅自然科学研究项目(Z02022) (Z02022)

The Pt microelectrode(φ=0.1 mm), made by abrasive polishing method with Bi₂O₃ powder was used to study cyclic voltammetric performance of Bi₂O₃ particles in alkaline solutions. The electrochemical measurments could be more quickly carried out than that by using composite electrode and cavity microelectrode. The SEM results showed the Bi₂O₃ particles were still present on the abrasive microelectrode after immersing in 9 mol/L KOH for 15 h and 10 times voltammetric cycling. The redox potential and current of main cycle voltammograms are comparably identical for both abrasive microelectrode and cavity microelectrode. It was found that OH^- concentration could influence CV performance of Bi₂O₃, indicating that OH^- is involved in the electrochemical reaction of Bi₂O₃. So the plateau peak on CV curves reported in some literatures can be explained in terms of the continuous change of OH^- concentration in the cavity of microelectrode, no plateau was observed with disk-like abrasive microelectrode.
- microelectrode,
- bismuth oxide,
- cyclic voltammetry
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Cyclic Voltammetric Performance of Bi₂O₃ Particles on Abrasive Microelectrode