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Simple Electrodeposition of Dendritic Pd Without Supporting Electrolyte and Its Electrocatalytic Activity Toward Oxygen Reduction and H2O2 Sensing

Title
Simple Electrodeposition of Dendritic Pd Without Supporting Electrolyte and Its Electrocatalytic Activity Toward Oxygen Reduction and H2O2 Sensing
Authors
Kang, MinkyungYang, YejinShim, Jun HoLee, Sang CheolLee, YoungmiLee, Chongmok
DGIST Authors
Lee, Sang Cheol
Issue Date
2013-12
Citation
Electroanalysis, 25(12), 2691-2699
Type
Article
Article Type
Article
Keywords
Dentritic PalladiumElectrocatalysisElectrodepositionHydrogen Peroxide SensingOxygen Reduction Reaction
ISSN
1040-0397
Abstract
Metallic palladium (Pd) electrocatalysts for oxygen reduction and hydrogen peroxide (H2O2) oxidation/reduction are prepared via electroplating on a gold metal substrate from dilute (5 to 50mM) aqueous K2PdCl4 solution. The best Pd catalyst layer possessing dendritic nanostructures is formed on the Au substrate surface from 50mM Pd precursor solution (denoted as Pd-50) without any additional salt, acid or Pd templating chemical species. The Pd-50consisted of nanostructured dendrites of polycrystalline Pd metal and micropores within the dendrites which provide high catalyst surface area and further facilitate reactant mass transport to the catalyst surface. The electrocatalytic activity of Pd-50 proved to be better than that of a commercial Pt (Pt/C) in terms of lower overpotential for the onset and half-wave potentials and a greater number of electrons (n) transferred. Furthermore, amperometric i-t curves of Pd-50 for H2O2 electrochemical reaction show high sensitivities (822.2 and -851.9μAmM-1cm-2) and low detection limits (1.1 and 7.91μM) based on H2O2 oxidation H2O2 reduction, respectively, along with a fast response (<1s). © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
URI
http://hdl.handle.net/20.500.11750/5288
DOI
10.1002/elan.201300399
Publisher
Wiley-VCH Verlag
Related Researcher
Files:
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Collection:
Convergence Research Center for Future Automotive Technology1. Journal Articles


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