In:
ChemistrySelect, Wiley, Vol. 3, No. 44 ( 2018-11-30), p. 12690-12695
Abstract:
Oxygen reduction reactions (ORRs) occur at cathodes in fuel cells and require efficient electrocatalysts. Because of the cost and limited durability and stability of commercial Pt/C catalysts, the development of efficient Pt‐free electrocatalysts is an active research topic. Here, we describe the solution‐based production of Fe 3 O 4 nanoparticles/N‐doped graphene‐based materials from FeCl 2 , graphene oxide (G−O), and hydrazine. Orders of production steps were varied by; i) reacting FeCl 2 and G−O first and then adding hydrazine (Fe/G−N), ii) reacting G−O, FeCl 2 , and hydrazine at the same time (Fe/G/N), or iii) reacting G−O and hydrazine first and then adding FeCl 2 (G/N−Fe). The hybrids produced showed better ORR electrocatalytic activity in alkaline media than single components such as N‐doped graphene‐based materials or Fe 3 O 4 . Furthermore, the electrocatalytic properties of the resulting hybrids were found to depend on orders of addition. Fe/G/N was found to be the best electrocatalyst and had better onset and half‐wave potentials, thermodynamic current density, and 4‐electron selectivity. All three hybrids show good cyclic durability and methanol tolerance.
Type of Medium:
Online Resource
ISSN:
2365-6549
,
2365-6549
DOI:
10.1002/slct.201801788
Language:
English
Publisher:
Wiley
Publication Date:
2018
detail.hit.zdb_id:
2844262-3
