title: A hybrid-assembly approach towards nitrogen-doped graphene aerogel supported cobalt nanoparticles as high performance oxygen reduction electrocatalysts.
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.
authors.affiliation: 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.
authors.forename: Ruili
authors.initials: R
authors.lastname: Liu
authors.affiliation: Department of Chemical Engineering, School of Environment and Chemical Engineering, Shanghai University, Shangda Road 99, 200444 Shanghai, PR China.
authors.forename: Yeqing
authors.initials: Y
authors.lastname: Jin
authors.affiliation: Department of Chemical Engineering, School of Environment and Chemical Engineering, Shanghai University, Shangda Road 99, 200444 Shanghai, PR China.
authors.forename: Peimin
authors.initials: P
authors.lastname: Xu
authors.affiliation: Department of Chemical Engineering, School of Environment and Chemical Engineering, Shanghai University, Shangda Road 99, 200444 Shanghai, PR China.
authors.forename: Xia
authors.initials: X
authors.lastname: Xing
authors.affiliation: National Engineering Lab for TFT-LCD Materials and Technologies, and Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China.
authors.forename: Yuxing
authors.initials: Y
authors.lastname: Yang
authors.affiliation: School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Dongchuan Road 800, 200240 Shanghai, PR China. Electronic address: wudongqing@sjtu.edu.cn.
authors.forename: Dongqing
authors.initials: D
authors.lastname: Wu
keywords: Cobalt; Hybrids; Nitrogen-doped graphene; Oxygen reduction