A hybrid hydrazine redox flow battery with a reversible electron acceptor
| Autor: | Alagar Raja Kottaichamy, Musthafa Ottakam Thotiyl, Yogesh Kalegowda, Manu Gautam, Swapnil Varhade, Ravikumar Thimmappa, Shahid Pottachola Shafi, Mruthyunjayachari Chattanahalli Devendrachari, Zahid Manzoor Bhat |
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| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Materials science Hydrazine General Physics and Astronomy 02 engineering and technology Inner sphere electron transfer Electron acceptor 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Flow battery Redox Cathode 0104 chemical sciences law.invention chemistry.chemical_compound chemistry Chemical engineering law Electrode Outer sphere electron transfer Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Physical chemistry chemical physics : PCCP. 20(33) |
| ISSN: | 1463-9084 |
| Popis: | Hydrazine is a pollutant with high hydrogen content, offering tremendous possibilities in a direct hydrazine fuel cell (DHFC) as it can be converted into electricity via benign end products. Due to the inner sphere nature of half-cell chemistries, hydrazine cross over triggers parasitic chemistry at the Pt-based air cathode of a state-of-the-art DHFC, overly complicating the already sluggish electrode kinetics at the positive electrode. Here, we illustrate that by altering the interfacial chemistry of the catholyte from inner sphere to outer sphere, the parasitic chemistry can be dissociated from the redox chemistry of the electron acceptor and the hybrid fuel cell can be driven by simple carbon-based cathodes. The reversible nature of an outer sphere catholyte leads to a hybrid fuel cell redox flow battery with performance metrics ∼4 times higher than a Pt-based DHFC-air configuration. |
| Databáze: | OpenAIRE |
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