Multiwalled carbon nanotube (MWCNT)-polyaniline (PANI) composite films were prepared by in situ electrochemical polymerisation on the titanium sheet from an aniline solution containing a small content of well dispersed MWCNT. Then these composite films were employed as substrate for the electrodeposition of platinum nanoparticles (PtNPs). The morphology of platinum nanoparticle/carbon nanotube-polyaniline composite coatings was characterised respectively by using a scanning electron microscope. The electrochemical behaviour and electrocatalytic activity of PtNPs/PANI-MWCNTs/Ti electrodes for glycerol oxidation were examined and the results show that these modified electrodes are highly active for electrocatalytic oxidation of glycerol.
Copper oxide nanostructures with diverse morphology were prepared using Cu foil as substrate via a solution route. The as grown copper oxide nanostructures were characterised using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy analysis. The XRD and FTIR analysis confirm the formation of copper oxide. Scanning electron microscopy analysis shows the formation of hierarchical structures of copper oxide with different morphologies. Application of the prepared copper oxide was evaluated as supercapacitive material in 1M Na 2 SO 4 solution using cyclic voltammetry (CV). The specific capacitance has been calculated using CV curves. It has been found that the pseudo-capacitor performance of copper oxide can be tuned via employing different samples.
A new catalyst, platinum nanostructure electrodeposited on tantalum substrate (Pt/Ta), was prepared. The morphology and surface analysis of Pt/Ta electrodes were investigated using SEM and EDX, respectively. Electrochemical characteristics of ethanol oxidation on Pt/Ta electrodes were investigated via cyclic voltammetric in acidic solutions. The results were compared to those at a smooth platinum electrode. It was found that the electro-catalytic oxidation of ethanol on the Pt/Ta electrode increases the rate of ethanol electro-oxidation several times larger than a smooth platinum electrode and confirmed the better electro-catalytic activity and stability of Pt/Ta electrodes.
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