Abstract
The present paper discusses the synthesis and characterization of nanostructured platinum coated titanium as electrode material. The electrodeposition of Pt particles on the Ti substrate was carried out from chloroplatinic acid at room temperature. Based on the cyclic voltammetric studies and UV-visible spectroscopy, direct reduction of Pt(IV) to Pt (0) was confirmed. The morphology of Pt particles was observed in scanning electron microscopy which revealed that the Pt particles with desired size were deposited on Ti from 5 mM electrolyte concentration at 60 s duration. The electrodeposited Pt particle on the Ti substrate subjected to hydrothermal reduction achieved complete coverage. Further microscopic observations and the energy dispersive spectroscopy results showed that the electrodeposited Pt particles acted as nuclei and enhanced further growth and coverage of particles during hydrothermal reduction. Also, morphology and surface coverage of Pt particle after hydrothermal reduction were found to be significantly influenced by the applied potential of the electrodeposition step. The electrochemical activity of the synthesized electrode was tested by conducting hydrogen adsorption-desorption study and oxygen reduction reaction.
Published Version
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