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Target Concepts:
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Query: UMLS:C1862200 (
RHE
)
1,093
document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)
Developing a facile strategy to synthesize an efficient and inexpensive catalyst for the oxygen reduction reaction (ORR) is critical to the commercialization of many sustainable energy storage and conversion techniques. Herein, a novel and convenient strategy was presented to prepare Fe
3
O
4
embedded into nitrogen-doped mesoporous carbon spheres (Fe
3
O
4
/N-
MCS
) by the polycondensation between methylolmelamines and ammonium ferric citrate (AFC) and subsequent pyrolysis process. In particular, the polycondensation reaction was completely finished within a very short time (6.5 min), and the iron contents can be adjusted and had a great influence on the microstructure. Moreover, the Fe
3
O
4
/N-
MCS
can be used as a robust catalyst for the ORR in alkaline media, and the catalyst with the iron content of 3.35 wt % exhibited excellent electrochemical performance in terms of more positive onset potential (E
0
= 1.036 V vs
RHE
) and half-wave potential (E
1/2
= 0.861 V) and much better methanol tolerance and long-term durability, in comparison with that of 20% Pt/C. The remarkable performance was ascribed to the characteristics of large specific surface area, mesoporous structure, high contents of pyridinic N and graphitic N, as well as strong electronic interaction between Fe
3
O
4
and protective N-doped graphitic layers.
...
PMID:Uniform Fe
3
O
4
/Nitrogen-Doped Mesoporous Carbon Spheres Derived from Ferric Citrate-Bonded Melamine Resin as an Efficient Synergistic Catalyst for Oxygen Reduction. 2797 67
