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

作　　者：童少平 张铁明 马淳安 

机构地区：[1]College of Chemical Engineering and Materials Science, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, China

出　　处：《Chinese Journal of Chemical Engineering》2008年第6期885-889,共5页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China （20406019）.

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^ -3 mA·cm^-2 and 18.62 kJ·mol^-1 for PTFE-F-PbO2, and 8.384×10^-4 mA·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.F-PbO2 电极和 polytetrafluoroethylene (PTFE ) 做了 F-PbO2 电极(PTFE-F-PbO2 ) 被一系列过程包括化学、电气化学的免职在有机玻璃表底层上准备。为氧的这二个电极的电气化学的活动进化(OE ) 反应被电气化学的测试检验。与 F-PbO2 比较， PTFE-F-PbO2 电极展出了更大的活跃表面区域和更高的氧空缺缺乏，它为 OE 导致了它的更高的 electrocatalytic 活动。另外，两个都交换电极的当前的密度和激活精力因为 OE 以活跃表面区域是计算的。在 0.5 摩尔的交换水流密度和激活精力的价值？

关 键 词：F-PbO2 polytetrafluoroethylene oxygen evolution electrocatalytic activity 

分 类 号：TQ11[化学工程—无机化工]