Electrochemical and Computational Study of Ion Association in the Electroreduction of PW12O403–
| Autor: | Angela Molina, Eduardo Laborda, R. G. Compton, J.M. Gómez-Gil, Joaquín González |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Tetramethylammonium
Inorganic chemistry Solvation Charge number 02 engineering and technology Ion-association 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Redox 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound General Energy chemistry Polyoxometalate Density functional theory Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | The Journal of Physical Chemistry C. 121:26751-26763 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.7b07073 |
| Popis: | Insights into ion pairing effects on the redox properties of the Keggin-type polyoxotungstate PW 12 O 40 3- are gained by combining electrochemical experiments and density functional theory (DFT) calculations. Such effects have been reported to affect the performance of these species as molecular electrocatalysts. Experimental square wave voltammetry (SWV) of the two-electron reduction of PW 12 O 40 3- in acetonitrile evidences that the reduced forms PW 12 O 40 4- and PW 12 O 40 5- can be significantly stabilized by ion association. The strength and stoichiometry of the corresponding aggregates are estimated as a function of the nature of the cation (lithium, sodium, and tetramethylammonium) and the oxidation state of the polyoxometalate. The results obtained in combination with DFT enable us to examine the roles of the cation solvation and the charge number and distribution of the polyanions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|