Issue 25, 2008
From the journal:

Physical Chemistry Chemical Physics

Electrodeposited noble metal particles in polyelectrolyte multilayer matrix as electrocatalyst for oxygen reduction studied using SECM†

Yan Shen,a   Markus Träublea  and  Gunther Wittstock*a  

* Corresponding authors

a Carl von Ossietzky University Oldenburg, Faculty of Mathematics and Natural Sciences, Center of Interface Science (CIS), Department of Pure and Applied Chemistry and Institute of Chemistry and Biology of the Marine Environment (ICBM), Oldenburg, Germany
E-mail: gunther.wittstock@uni-oldenburg.de
Fax: +49 (0)441 798 3979
Tel: +49 (0)441 798 3971

Abstract

Taking the advantage of the stability and penetrability of polyelectrolyte films formed by layer-by-layer (LbL) deposition, noble metal particles of Pd and Pt were fabricated in a preformed polyeletrolyte multilayer film by galvanic deposition. The metal deposition occurred as metal particles and they were tested for their properties as electrocatalyst for oxygen reduction. Atomic force microscopy (AFM) was used to characterize the morphology of the particle films. The noble metal particles were investigated by cyclic voltammetry (CV) and scanning electrochemical microscopy (SECM) with respect to oxygen reduction. The results show that the electrocatalytic properties of the Pd particle film can be adjusted by the electrodeposition time. The hydrogen peroxide formed as an intermediate during electroreduction of dioxygen was conveniently measured in the SECM using the substrate-generation/tip-collection mode. The relevance of the main reduction pathways could be extracted from fitting the current transients to an analytical model.

Graphical abstract: Electrodeposited noble metal particles in polyelectrolyte multilayer matrix as electrocatalyst for oxygen reduction studied using SECM

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Article information

DOI
https://doi.org/10.1039/B802688B
Article type
Paper
Submitted
15 Feb 2008
Accepted
03 Apr 2008
First published
15 May 2008

Phys. Chem. Chem. Phys., 2008,10, 3635-3644

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Electrodeposited noble metal particles in polyelectrolyte multilayer matrix as electrocatalyst for oxygen reduction studied using SECM

Y. Shen, M. Träuble and G. Wittstock, Phys. Chem. Chem. Phys., 2008, 10, 3635 DOI: 10.1039/B802688B

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