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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-
Naseer, Rashda; Mal, Sib Sankar; Ibrahim, Masooma; Kortz, Ulrich; Armstrong, Gordon; Laffir, Fathima R.; Dickinson, Calum; Vagin, Mikhail; McCormac, Timothy
The electrocatalytic ability of the iron-substituted crown-type polyoxometalate (POM)Li4K16[P8W48O184Fe16(OH)28(H2O)4]·66H2O·2KCl (P8W48Fe16) towards the reduction of both nitriteand hydrogen peroxide reduction has been studied in both the solution and immobilized states for thePOM. P8W48Fe16was surface immobilised onto carbon electrode surfaces through employment of thelayer-by-layer technique (LBL) using pentaerythritol-based Ru(II)-metallodendrimer [RuD](PF6)8as thecationic layer within the resulting films. The constructed multilayer films have been extensively studiedby various electrochemical techniques and surface based techniques. Cyclic voltammetry and impedancespectroscopy have been utilized to monitor the construction of the LBL film after the deposition of eachmonolayer. The electrochemical behaviour of both a cationic and anionicredox probes at the LBL films has been undertaken to give indications as to the film’s porosity. The ele-mental composition and the surface morphology of the LBL films was conifmrde through the employmentof AFM, XPS and SEM. ACCEPTED peer-reviewed
Keyword(s): polyoxometalate; electrocatalysis; layer-by-layer; iron-substituted crown-type POM; nitrite reduction; peroxide reduction
Publication Date:
2014
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: University of Limerick
Citation(s): Electrochimica Acta;134, pp. 450-458
http://dx.doi.org/10.1016/j.electacta.2014.03.099
Publisher(s): Elsevier
First Indexed: 2017-10-14 07:21:16 Last Updated: 2019-10-12 06:37:50