Carbon Nanomaterial–Phosphomolybdate Composites for Oxidative Electrocatalysis. Issue 2 (12th November 2014)

• Record Type: Journal Article
• Authors: Fernandes, Diana M.; Freire, Cristina
• Is Part Of: ChemElectroChem. Volume 2:Issue 2(2015)
• Page Start: 269
• Page End: 279
• Publication Date: 2014-11-12
• Subjects: Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.201402271
• Languages: English
• ISSNs: 2196-0216

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Novel hybrid nanocomposites based on the immobilisation of tetrabutylammonium salts of phosphomolybdates (PMo₁₂, PMo₁₁, PMo₁₁V, and PMo₁₀V₂) on single‐walled carbon nanotubes or graphene flakes were prepared. Glassy carbon electrodes modified with carbon nanocomposites produce cyclic voltammograms that are consistent with surface‐confined redox processes attributed to Mo‐centred reduction (Mo^VI→Mo^V) and vanadium reduction (V^V→V^IV) for PMo₁₁V and PMo₁₀V₂. Furthermore, they show very high stabilities and well‐resolved redox peaks with high current intensities. The observed enhancement of the electrochemical properties of polyoxometalates (POMs) is a consequence of strong electronic communication between POMs and carbon nanomaterials. Nanocomposites of vanadium–phosphomolybdates exhibit superior V‐based electrocatalytic properties towards ascorbic acid oxidation in comparison with free POMs; moreover, PMo₁₁V@graphene shows an outstanding sensing performance for the detection of dopamine.</p> </abstract>