Preparation of MWCNT/TiO۲eCo nanocomposite electrode by electrophoretic deposition and electrochemical study of hydrogen storage

چکیده مقاله

The TiO2eCo nanoparticles (NPs) were synthesized by a solegel method. Multiwall carbon nanotubes (CNTs) decorated with TiO2eCo NPs (CNT/TiO2eCo) nano-composite films, free of polymer binder were deposited directly on a copper substrate by an electrophoresis deposition (EPD) method. The morphology, structure and composition of the samples were characterized. Electrochemical properties of CNT/TiO2-nanocomposite were investigated using galvanostatic chargeedischarge techniques. The electrochemical measurement revealed that the CNT/TiO2eCo has a discharge capacity (305 mAh/g) two times higher than that of pure multiwall CNT and 1.6 times higher than CNT/TiO2 and quite appealing for the battery applications. The mechanism of enhancement of the electrochemical activity for the CNT/TiO2eCo could be attributed to the electrochemical activity of Cu and CNTs that were catalyzed by TiO2 thus enabling cobalt atoms to act as redoxing sites for hydrogen storage.