Potential and current oscillations during electrocatalytic oxidation of formaldehyde at a Pt nanoparticles modified electrode

作者：Tang Yi Ting; Zhao Guo Hua^*; Chen Rui; Geng Rong; Hu Hui Kang

来源：Chemical Journal of Chinese Universities, 2008, 29(4): 783-787.

• electrochemical oscillations
• Pt nanoparticles modified electrode
• formaldehyde

The platinum (Pt) nanoparticles modified titanium electrode was prepared via the method of cathodic reduction followed by anodic oxidation. Scanning electron microscopy(SEM) analysis illustrated that Pt nanoparticles were dispersed highly in the three-dimensional pore network of titanium oxide on the surface of this electrode. Not only potential oscillations under galvanostatic conditions but also current oscillations under both cyclic voltammetric and potentiostatic conditions during the formaldehyde (HCHO) oxidation were observed with several different electrochemical methods. This further revealed that the highly-dispersed Pt nanoparticles improved greatly the electrocatalytic activities of electrode, then facilitated the oxidation process of HCHO and its intermediate product so that these were favorable to the production of electrochemical oscillations. Also, many factors such as the concentration of HCHO and H2SO4, the applied potential or current were shown to have regular influence on the intensity, region or pattern of oscillations.

• 出版日期2008-4-10
• 单位同济大学