title: Hierarchically porous nitrogen-doped graphene aerogels as efficient metal-free oxygen reduction catalysts.
abstract: Nitrogen-doped graphene aerogels with hierarchically porous architectures (N-Gs) are fabricated through the co-assembly of graphene oxide and o-phthalonitrile in a solvothermal process and the thermal treatment of the obtained composites at different temperatures. The structural characterizations indicate that both mesopores and macropores exist in the monolithic N-Gs. More importantly, the architectures, porosities and compositions show obvious dependence on the thermal treatment temperature. As the metal-free catalyst for oxygen reduction reaction in basic media, the sample thermally treated at 750°C shows the best catalytic performances among the three N-Gs, which is owing to its advantages in the surface areas and content of active N species.
authors.affiliation: School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Dongchuan Road 800, 200240 Shanghai, PR China.
authors.forename: Zongsheng
authors.initials: Z
authors.lastname: Hou
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: Xin
authors.initials: X
authors.lastname: Xi
authors.affiliation: School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Dongchuan Road 800, 200240 Shanghai, PR China.
authors.forename: Tao
authors.initials: T
authors.lastname: Huang
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
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: National Engineering Lab for TFT-LCD Materials and Technologies, Department of Electronic Engineering, Shanghai Jiao Tong University, Dongchuan Road 800, 200240 Shanghai, PR China. Electronic address: ruililiu@sjtu.edu.cn.
authors.forename: Ruili
authors.initials: R
authors.lastname: Liu
keywords: Graphene aerogel; Metal-free catalyst; Nitrogen-doping; Oxygen reduction reaction