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J Colloid Interface Sci. 2016 Feb 15;464:83-8. doi: 10.1016/j.jcis.2015.11.007. Epub 2015 Nov 5.

A hybrid-assembly approach towards nitrogen-doped graphene aerogel supported cobalt nanoparticles as high performance oxygen reduction electrocatalysts.

Author information

1
National Engineering Lab for TFT-LCD Materials and Technologies, and Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China. Electronic address: ruililiu@sjtu.edu.cn.
2
Department of Chemical Engineering, School of Environment and Chemical Engineering, Shanghai University, Shangda Road 99, 200444 Shanghai, PR China.
3
National Engineering Lab for TFT-LCD Materials and Technologies, and Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China.
4
School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Dongchuan Road 800, 200240 Shanghai, PR China. Electronic address: wudongqing@sjtu.edu.cn.

Abstract

As a novel electrocatalyst for oxygen reduction reaction (ORR), nitrogen-doped graphene aerogel supported cobalt nanoparticles (Co-NGA) is archived by a hybrid-assembly of graphene oxide (GO), o-phthalonitrile and cobalt acetate and the following thermal treatment. The hybrid-assembly process successfully combines the ionic assembly of GO sheets and Co ions with the coordination between o-phthalonitrile and Co ions, which can be converted to nitrogen doped carbon and Co nanoparticles in the pyrolysis process under nitrogen flow. Remarkable features of Co-NGA including the macroporous graphene scaffolds, high surface area, and N/Co-doping effect can lead to a high catalytic efficiency for ORR. As the results, the composites pyrolyzed at 600°C (Co-NGA600) shows excellent electrocatalytic activities and kinetics for ORR in basic media, which are comparable with those of Pt/C catalyst, together with superior durability.

KEYWORDS:

Cobalt; Hybrids; Nitrogen-doped graphene; Oxygen reduction

PMID:
26609926
DOI:
10.1016/j.jcis.2015.11.007

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