Efficient approach to iron/nitrogen co-doped graphene materials as efficient electrochemical catalysts for the oxygen reduction reaction

Dong Q, Zhuang X, Li Z, Li B, Fang B, Yang C, Xie H, Zhang F, Feng X (2015)

Publication Type: Journal article

Publication year: 2015

Journal

Journal of Materials Chemistry A Royal Society of Chemistry

Book Volume: 3

Pages Range: 7767-7772

Journal Issue: 15

DOI: 10.1039/c5ta00556f

Abstract

Cyclopentadienyliron (CpFe) groups have been successfully attached on the surface of reduced graphene oxide (rG) by a ligand-exchange reaction of ferrocene (Cp2Fe) and rG to produce CpFe-modified reduced graphene oxide (rGFeCp), which exhibits good processability in many organic solvents. In a similar one-pot reaction, graphite was efficiently exfoliated using Cp2Fe as the intercalator to form CpFe-attached free-standing graphene nanosheets (GFeCp, ∼10 layers). Upon pyrolysis and ammonia activation, rGFeCp and GFeCp were converted to iron/nitrogen co-doped porous graphenes, namely, rGFe-800a and GFe-800a, respectively. The obtained rGFe-800a exhibited good electrochemical performance for the oxygen reduction reaction (ORR) under alkaline conditions (0.1 M KOH) with a low half-wave potential at -0.29 V, a dominant four-electron transfer mechanism (n = 3.5 at -1.0 V), and a maximum diffusion-limiting current density of 4.86 mA cm-2. In addition, rGFe-800a showed excellent methanol tolerance, superior to that of commercial 20% Pt/C. The effect of iron/nitrogen co-doping plays a key role in the good ORR activities of the as-prepared materials.

Involved external institutions

East China University of Science and Technology (ECUST) CN China (CN) Shanghai Jiao Tong University / 上海交通大学 CN China (CN)

How to cite

APA:

Dong, Q., Zhuang, X., Li, Z., Li, B., Fang, B., Yang, C.,... Feng, X. (2015). Efficient approach to iron/nitrogen co-doped graphene materials as efficient electrochemical catalysts for the oxygen reduction reaction. Journal of Materials Chemistry A, 3(15), 7767-7772. https://doi.org/10.1039/c5ta00556f

MLA:

Dong, Qingqing, et al. "Efficient approach to iron/nitrogen co-doped graphene materials as efficient electrochemical catalysts for the oxygen reduction reaction." Journal of Materials Chemistry A 3.15 (2015): 7767-7772.

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