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Redox, surface and electrocatalytic properties of layer-by-layer films based upon Fe(III)-substituted crown polyoxometalate [P8W48O184Fe16(OH)(28)(H2O)(4)](20-)
Dundalk Institute Technology, Ireland .
Jacobs University, Bremen, Germany .
Jacobs University, Bremen, Germany .
Jacobs University, Bremen, Germany .
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2014 (English)In: Electrochimica Acta, ISSN 0013-4686, E-ISSN 1873-3859, Vol. 134, 450-458 p.Article in journal (Refereed) Published
Abstract [en]

The electrocatalytic ability of the iron-substituted crown-type polyoxometalate (POM) Li4K16[P8W48O184Fe16(OH)(28)(H2O)(4)]center dot 66H(2)O center dot 2KCl (P8W48Fe16) towards the reduction of both nitrite and hydrogen peroxide reduction has been studied in both the solution and immobilized states for the POM. P8W48Fe16 was surface immobilised onto carbon electrode surfaces through employment of the layer-by-layer technique (LBL) using pentaerythritol-based Ru(II)-metallodendrimer [RuD](PF6)(8) as the cationic layer within the resulting films. The constructed multilayer films have been extensively studied by various electrochemical techniques and surface based techniques. Cyclic voltammetry and impedance spectroscopy have been utilized to monitor the construction of the LBL film after the deposition of each monolayer. The electrochemical behaviour of both a cationic and anionic redox probes at the LBL films has been undertaken to give indications as to the films porosity. The elemental composition and the surface morphology of the LBL films was conifmrde through the employment of AFM, XPS and SEM.

Place, publisher, year, edition, pages
Elsevier, 2014. Vol. 134, 450-458 p.
Keyword [en]
Polyoxometalate; Electrocatalysis; Layer-by-layer; Iron-substituted crown-type POM; Nitrite reduction; Peroxide reduction
National Category
Physical Sciences Chemical Sciences
Identifiers
URN: urn:nbn:se:liu:diva-109221DOI: 10.1016/j.electacta.2014.03.099ISI: 000338387200057OAI: oai:DiVA.org:liu-109221DiVA: diva2:737202
Available from: 2014-08-12 Created: 2014-08-11 Last updated: 2017-12-05Bibliographically approved

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Vagin, Mikhail

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