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Functional electrochemically-active ultra-thin Nafion films

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Bertoncello, Paolo, Peruffo, Massimo, Li, Fei and Unwin, Patrick R. (2008) Functional electrochemically-active ultra-thin Nafion films. Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol.321 (No.1-3, Sp. Iss. SI). pp. 222-226. doi:10.1016/j.colsurfa.2007.12.053

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Official URL: http://dx.doi.org/10.1016/j.colsurfa.2007.12.053

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Abstract

Two methods for adding electrochemical functionality to ultra-thin Nation films are described. First, a novel "one-step procedure" to incorporate cationic redox mediators such as methyltrimethylammonioferrocene (FA(+)), within ultra-thin Nafion films is proposed. Ultra-thin films of Nafion containing FA(+), were prepared on indium tin oxide (ITO) electrodes using the Langmuir-Schaefer (LS) technique. The morphology and thickness of the films were evaluated with atomic force microscopy (AFM). Film thicknesses were 1.9 +/- 0.3 nin per LS layer and voltammetric data confirmed the successful incorporation of the mediator into the films. Key parameters such as surface coverage, concentration of the mediator within the films and apparent diffusion coefficients were extracted. Second, Pd nanoparticles were formed within Nafion LS films by loading pristine films with Pd2+ and then reducing the ions to form Pd. The catalytic properties of this novel nanocomposite for hydrogen oxidation were examined using cyclic voltammetry. (c) 2008 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science > Chemistry
Library of Congress Subject Headings (LCSH): Thin films, Electrochemistry, Nanoparticles, Surface chemistry, Polymers, Hydrogen -- Oxidation
Journal or Publication Title: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Publisher: Elsevier BV
ISSN: 0927-7757
Official Date: 15 May 2008
Dates:
DateEvent
15 May 2008Published
Volume: Vol.321
Number: No.1-3, Sp. Iss. SI
Number of Pages: 5
Page Range: pp. 222-226
DOI: 10.1016/j.colsurfa.2007.12.053
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: European Union (EU), European Cooperation in the Field of Scientific and Technical Research (Organization) (COST), Sixth Framework Programme (European Commission) (FP6)
Grant number: MRTN-CT-2003-504233 (EU), D31/0001/04 (COST), D36/005/06 (COST), MEIF-CT-2005-515356 (FP6)
Version or Related Resource: Presented at: 12th International Conference on Organized Molecular Films, Cracow, Poland, Jul 01-05, 2007
Type of Event: Conference

Data sourced from Thomson Reuters' Web of Knowledge

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