Cooperative Electrocatalytic O2 Reduction Involving Co(salophen) with p-Hydroquinone as an Electron–Proton Transfer Mediator
| Autor: | Shannon S. Stahl, Colin W. Anson |
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| Rok vydání: | 2017 |
| Předmět: |
Proton
Chemistry chemistry.chemical_element Cooperativity 02 engineering and technology General Chemistry Electron 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry Electrocatalyst 01 natural sciences Biochemistry Redox Combinatorial chemistry Catalysis 0104 chemical sciences Colloid and Surface Chemistry Mediator 0210 nano-technology Cobalt |
| Zdroj: | Journal of the American Chemical Society. 139:18472-18475 |
| ISSN: | 1520-5126 0002-7863 |
| Popis: | The molecular cobalt complex, Co(salophen), and para-hydroquinone (H2Q) serve as effective cocatalysts for the electrochemical reduction of O2 to water. Mechanistic studies reveal redox cooperativity between Co(salophen) and H2Q. H2Q serves as an electron-proton transfer mediator (EPTM) that enables electrochemical O2 reduction at higher potentials and with faster rates than is observed with Co(salophen) alone. Replacement of H2Q with the higher-potential EPTM, 2-chloro-H2Q, allows for faster O2 reduction rates at higher applied potential. These results demonstrate a unique strategy to achieve improved performance with molecular electrocatalyst systems. |
| Databáze: | OpenAIRE |
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