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Nitrogen-doped graphene-like carbon from bio-waste as efficient low-cost electrocatalyst for fuel cell application.
- Source :
-
Bulletin of Materials Science . Jun2021, Vol. 44 Issue 2, p1-7. 7p. - Publication Year :
- 2021
-
Abstract
- The development of metal-free carbon-based catalysts for alkaline fuel cells has been the subject of current interest, because of the low cost and improving fuel cell efficiency. Particularly, nitrogen-doped carbon shows prominent results. Here, we show an oxygen reduction reaction (ORR) activity of nitrogen-doped graphene-like carbon materials (N-GLC) prepared by heating bagasse-derived carbon and melamine in a 1:15 ratio. The N-GLC catalyst displays excellent electro-catalytic activity towards the ORR with an onset potential of 0.92 V vs. reversible hydrogen electrode (RHE) in alkaline media (0.1 M KOH). Moreover, the half-wave (E1/2) potential 0.83 V is almost the same compared to Pt-C (40 wt%) catalyst and the diffusion limiting current of 4 mA cm–2. The rotating ring disc experiment showed a four-electron pathway (n = 3.65) with the moderate peroxide ( HO 2 - ) yield. Due to its promising ORR activity and long-term electrochemical stability, N-GLC catalyst is used in alkaline anion exchange membrane fuel cell (AEMFC) as a single cell, about 6 mW cm–2 peak power density was achieved at the load current density of ~20 mA cm–2. So the N-GLC can be a cheap alternative ORR catalyst for AEMFC applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02504707
- Volume :
- 44
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Bulletin of Materials Science
- Publication Type :
- Academic Journal
- Accession number :
- 150318216
- Full Text :
- https://doi.org/10.1007/s12034-021-02367-9