Coral‐like nitrogen doped carbon derived from polyaniline‐silicon nitride hybrid for highly active oxygen reduction electrocatalysis
| Autor: | Luiz Antonio Pessan, Mohd. Khalid, Ana M.B. Honorato |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Coral like
Materials science ORR chemistry.chemical_element Nitrogen doped Electrocatalyst TP250-261 Reduction (complexity) Active oxygen chemistry.chemical_compound coral‐like structure Chemistry chemistry Silicon nitride Chemical engineering Industrial electrochemistry Polyaniline electrocatalysis Carbon QD1-999 nitrogen‐doped carbon |
| Zdroj: | Electrochemical Science Advances, Vol 1, Iss 2, Pp n/a-n/a (2021) |
| ISSN: | 2698-5977 |
| Popis: | In this work, a coral‐like nitrogen‐doped carbon electrocatalyst has been prepared via self‐assembly oxidative polymerization of aniline monomers onto silicon nitride (Si3N4) nanospheres, followed by carbonization. The prepared catalyst at 900°C (denoted as NC‐900) shows excellent oxygen reduction reaction (ORR) activity by achieving an onset potential (η) of 0.90 V versus reversible hydrogen electrode (RHE) and half wave potential (E1/2) of 0.82 V versus RHE comparable to that of the commercial Pt/C (η = 0.99 V vs. RHE and E1/2 = 0.87 V vs RHE) and even outperforming many carbon‐based electrocatalysts recently reported in the literature. The catalyst NC‐900 also displays better stability and resistance toward methanol crossover effect than Pt/C in alkaline solution. The high ORR performance of NC‐900 catalyst was associated with high content of nitrogen species and hierarchical mesoporous structure that facilitate high electron and mass transport. |
| Databáze: | OpenAIRE |
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