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http://dx.doi.org/10.5229/JKES.2014.17.4.209

Electrocatalytic Activity of Dendritic Platinum Structures Electrodeposited on ITO Electrode Surfaces  

Choi, Suhee (Department of Chemistry, Chungbuk National University)
Choi, Kang-Hee (Department of Chemistry, Chungbuk National University)
Kim, Jongwon (Department of Chemistry, Chungbuk National University)
Publication Information
Journal of the Korean Electrochemical Society / v.17, no.4, 2014 , pp. 209-215 More about this Journal
Abstract
We report on the electrocatalytic activities at Pt nanostructure surfaces electrodeposited with different deposition charges on indium tin oxide electrodes for oxygen reduction and methanol oxidation reactions. The surface properties of Pt nanostructures depending on deposition charges were characterized by scanning electron microscopy, electrochemical surface area measurement, X-ray diffraction, and CO stripping analysis, which were correlated to the electrocatalytic activities. Pt nanostructures with deposition charge of 0.03 C exhibited the highest electrocatalytic activity for oxygen reduction and methanol oxidation. The sharp sites of Pt nanostructure and the presence of highly active facet play a key role, whereas the electrochemical surface area does not significantly affect the electrocatalytic activity. The results obtained in this work with regard to the dependence of electrocatalytic activity on the variation of the Pt nanostructures will give insights into the development of advanced electrocatalytic systems.
Keywords
Electrodeposition; Dendritic Pt; Oxygen reduction; Methanol oxidation;
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