Preparation and electrochemical performance comparison of titanium electrodes modified with surfactants

Pd/PPy(SDS)/Ti, Pd/PPy(SLS)/Ti, Pd/PPy(SDBS)/Ti and Pd/PPy(CTAB)/Ti electrode were prepared by electrochemical deposition behaviors of composite membrane of surfactants and pyrrole. Electrochemical performance comparison of electrodes was done. The results of CV revealed that Pd/PPy(CTAB)/Ti electrode can get maximal hydrogen adsorption peak of -146.8 mA at -500 mV (vs. Hg/Hg2SO4). Scanning Electron Microscope (SEM) images revealed that Pd was deposited almost homogeneous particles on the PPy composite membrane modified with CTAB. The range of its size is from nanons to a few microns. The surface of tiny particles exhibits a layered structure. This structure has a good spatial extent. The shapes of needle are very dense. ICP-AES showed that, with the surfactants CTAB modification, high electrochemical performance of electrodes was obtained with less loading of Pd on electrode. The results show that Pd/PPy(CTAB)/Ti electrode has great potential applications in the field of electrocatalytic reduction dechlorination.