Electrochemical Behaviour of First Row Transition Metal Substituted Polyoxotungstates: A Comparative Study in Acetonitrile

Abstract

A comparative study of the electrochemical behaviour of several transition metal substituted polyoxotungstates in acetonitrile solution with tetra-n-butylammonium perchlorate as a supporting electrolyte is presented. Tetra-nbutylammonium salts of Keggin-type polyoxoanions, α- m− , the co-existence of spe-

Oxidation of cycloalkanes with hydrogen peroxide in the presence of Keggin-type polyoxotungstates

“…Tetrabutylammonium salts of the required polyoxotungstates were prepared by known procedures [15][16][17]. Reaction conditions used in the catalytic studies are presented in Tables 1-3.…”

Functionalisation of glassy carbon electrodes with deposited tetrabutylammonium microcrystalline salts of lacunary and metal-substituted α-Keggin-polyoxosilicotungstates

“…Elemental analysis, powder X-ray diffraction, thermogravimetric and spectrometric studies were performed as referred on the literature [10]. An optical inverted microscope Zeiss connected to a digital camera Cannon was used for optical microscopy.…”

“…Substituted polyanions (general formula [XM 11 M (H 2 O)O 39 ] p− ) may be obtained by changing at least one of the addenda ions by another metal ion, M , which can be also electroactive, enlarging the scope of electrocatalytic applications [1,2,10]. In the present work the studied anions were the lacunary ␣-[SiW 11 The production of new devices for specific applications, e.g., catalysis, electro-optical and chemical sensing has been, in the past years, an enthusiastic and rapidly growing area.…”

Transition-Metal-Substituted Keggin-Type Germanotungstates for Catalytic Conversion of Carbon Dioxide to Cyclic Carbonate

“…were prepared by removing the solvent under reduced pressure after cation exchange with an aqueous solution of the corresponding potassium salts in excessive amount with toluene solution of (n-C 7 H 15 ) 4 NBr by the method of literature [28]. The [(n-C 4 H 9 ) 4 N] 4 H 2 GeW 11 MnO 39 was synthesized using the reported method [29] and was purified by repeated reprecipitation from acetonitrile solution with the addition of excess water [30,31].…”