Co-N-C electrocatalysts derived from nitrogen containing conjugated polymers for hydrogen evolution
| Autor: | O. O. Pariiska, Yaroslav Kurys, D. O. Mazur |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
chemistry.chemical_classification Tafel equation Chemistry Inorganic chemistry 02 engineering and technology Carbon black Polymer Conjugated system Overpotential 021001 nanoscience & nanotechnology Electrocatalyst 01 natural sciences Catalysis 0103 physical sciences Molecule 0210 nano-technology |
| Zdroj: | Materials Today: Proceedings. 6:73-78 |
| ISSN: | 2214-7853 |
| DOI: | 10.1016/j.matpr.2018.10.077 |
| Popis: | New Co-N-C electrocatalysts for hydrogen evolution reaction (HER) were successfully prepared via heat treatment of a series of nitrogen containing conjugated polymers – N-CP (poly-m-phenylenediamine, poly-8-aminoquinoline, poly-2,6-diaminopyridine, poly-5-aminoindole) with carbon black and Co(NO 3 ) 2 . For the first time, we demonstrated influence of the N-CP type, like a nitrogen precursor, on activity toward HER of Co-N-C composites in acidic media, which may be related, in particular, to the differences in the molecular structure of polymers. It was found, that the best HER performance inherent to an electrocatalyst obtained based on poly-5-aminoindole (overpotential at 5 mA/cm 2 ∼ 177 mV, Tafel slope - 132 mV/dec). According to obtained experimental data, it was assumed that the hydrogen evolution on Co-N-C catalysts takes place by the Volmer-Heyrovsky mechanism and the Volmer step is rate-limiting. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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