6533b839fe1ef96bd12a637f
RESEARCH PRODUCT
Electrochemical Detection of High Oxidation States of Chromium( IV and V ) in Chromium‐Doped Cassiterite and Tin‐Sphene Ceramic Pigmenting Systems
Esther Ruiz De SolaJavier AlarcónAntonio DoménechFrancisco Jose Torressubject
ChemistryMetal ions in aqueous solutionInorganic chemistryDopingCassiteritechemistry.chemical_elementengineering.materialElectrochemistryInorganic ChemistryChromiumvisual_artvisual_art.visual_art_mediumengineeringCeramicTinVoltammetrydescription
Solid-state electrochemistry is applied to detect the presence of chromium centres with high oxidation states in chromium-doped cassiterite and tin-sphene ceramic pigmenting systems. Voltammetric data indicate that CrV and CrIV centres with different coordinative arrangements exist in the studied materials, and yield proton-assisted reduction processes at +0.95, +0.42 AgCl/Ag in contact with 0.50 M H2SO4. Electrochemical measurements are correlated with spectroscopic data. The CrIV and CrV metal ions display a significant light-driven electrocatalytic effect on the oxidation of 1,4-dihydrobenzoquinone and Fe(CN)64– ions that involves the formation of surface-confined adducts. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-01-25 | European Journal of Inorganic Chemistry |