Oxygen Evolution Behavior of PTFE-F-PbO2 Electrode in H2SO4 Solution

›› 2008, Vol. 16 ›› Issue (6): 885-889.

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Oxygen Evolution Behavior of PTFE-F-PbO₂ Electrode in H₂SO₄ Solution

TONG Shaoping, ZHANG Tieming, MA Chun'an

College of Chemical Engineering and Materials Science, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, China

Received:2008-04-22 Revised:2008-07-23 Online:2008-12-28 Published:2008-12-28
Supported by:
Supported by the National Natural Science Foundation of China (20406019)

Oxygen Evolution Behavior of PTFE-F-PbO₂ Electrode in H₂SO₄ Solution

童少平, 张铁明, 马淳安

College of Chemical Engineering and Materials Science, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, China

通讯作者: TONG Shaoping,E-mail:sptong@zjut.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China (20406019)

Abstract

Abstract: F-PbO₂ electrode and polytetrafluoroethylene(PTFE) doped F-PbO₂ electrode(PTFE-F-PbO₂) were prepared on a plexiglas sheet substrate by a series of procedure including chemical and electrochemical depositions. The electrochemical activities of these two electrodes for oxygen evolution(OE) reaction were examined by electrochemical tests.In comparison with F-PbO₂,PTFE-F-PbO₂ electrode exhibited larger active surface area and higher oxygen vacancy deficiency,which resulted in its higher electrocatalytic activity for OE.In addition,both exchange current density and activation energy of the electrodes for OE were calculated in terms of active surface area.The values of exchange current density and activation energy in 0.5 mol·L^-1 H₂SO₄ aqueous solution were 1.125×10^-3mA·cm^-2 and 18.62 kJ·mol^-1 for PTFE-F-PbO₂,and 8.384×10^-4mA·cm^-2 and 28.98 kJ·mol^-1 for F-PbO₂,respectively.Because these values are calculated on the basis of the active surface areas of the electrodes, the enhanced activity of PTFE-F-PbO₂ can be attributed to an increase in oxygen vacancy deficiency of PbO₂ due to doping by PTFE.The influence of PTFE adulteration on the activity of PbO₂ film electrode for OE was investigated in detail in this study.

Key words: F-PbO₂, polytetrafluoroethylene, oxygen evolution, electrocatalytic activity

摘要： F-PbO₂ electrode and polytetrafluoroethylene(PTFE) doped F-PbO₂ electrode(PTFE-F-PbO₂) were prepared on a plexiglas sheet substrate by a series of procedure including chemical and electrochemical depositions. The electrochemical activities of these two electrodes for oxygen evolution(OE) reaction were examined by electrochemical tests.In comparison with F-PbO₂,PTFE-F-PbO₂ electrode exhibited larger active surface area and higher oxygen vacancy deficiency,which resulted in its higher electrocatalytic activity for OE.In addition,both exchange current density and activation energy of the electrodes for OE were calculated in terms of active surface area.The values of exchange current density and activation energy in 0.5 mol·L^-1 H₂SO₄ aqueous solution were 1.125×10^-3mA·cm^-2 and 18.62 kJ·mol^-1 for PTFE-F-PbO₂,and 8.384×10^-4mA·cm^-2 and 28.98 kJ·mol^-1 for F-PbO₂,respectively.Because these values are calculated on the basis of the active surface areas of the electrodes, the enhanced activity of PTFE-F-PbO₂ can be attributed to an increase in oxygen vacancy deficiency of PbO₂ due to doping by PTFE.The influence of PTFE adulteration on the activity of PbO₂ film electrode for OE was investigated in detail in this study.

关键词: F-PbO₂, polytetrafluoroethylene, oxygen evolution, electrocatalytic activity

TONG Shaoping, ZHANG Tieming, MA Chun'an. Oxygen Evolution Behavior of PTFE-F-PbO₂ Electrode in H₂SO₄ Solution[J]. , 2008, 16(6): 885-889.

童少平, 张铁明, 马淳安. Oxygen Evolution Behavior of PTFE-F-PbO₂ Electrode in H₂SO₄ Solution[J]. , 2008, 16(6): 885-889.

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Oxygen Evolution Behavior of PTFE-F-PbO₂ Electrode in H₂SO₄ Solution

Oxygen Evolution Behavior of PTFE-F-PbO₂ Electrode in H₂SO₄ Solution

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