The Redox Reaction of Binuclear Ruthenium(IV) Oxochloride Complex with Lithium Countercations in the Oxidation of Water
| Autor: | T. S. Dzhabiev, L. V. Avdeeva, V. Yu. Tkachenko, L. I. Tkachenko, Z. M. Dzhabieva |
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| Rok vydání: | 2020 |
| Předmět: |
Dimer
chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Redox 0104 chemical sciences Ruthenium Catalysis chemistry.chemical_compound Monomer chemistry Polymer chemistry Molecule Lithium 0210 nano-technology |
| Zdroj: | Russian Journal of Electrochemistry. 56:605-610 |
| ISSN: | 1608-3342 1023-1935 |
| DOI: | 10.1134/s1023193520060130 |
| Popis: | The reaction of reduction of binuclear ruthenium(IV) oxochloride complex with lithium coutercations Li4Ru2OCl10 in HCl solutions is studied by electrochemical and spectrophotometric methods. The results are consistent with the process involving the irreversible reduction of the dimer in weakly acidic medium (0.2–0.8 М HCl) to form a mixed-valence intermediate which decomposes later to Ru(IV) and Ru(III) monomers. Increasing the HCl concentration to 2.0 М and higher excludes its formation. The kinetics of the reduction of Ru(IV)–Ru(IV) dimer by coordinated water in 3 М HCl obeys the bimolecular law. Binuclear complexes self-assemble into the tetranuclear catalyst which oxidizes water to oxygen molecule by the four-electron mechanism. The composition of the tetranuclear catalyst is determined by means of electrospray mass spectrometry. |
| Databáze: | OpenAIRE |
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