title: N-Doped graphene frameworks with superhigh surface area: excellent electrocatalytic performance for oxygen reduction.
abstract: N-Doped carbon materials are promising candidates as alternative catalysts to noble metals in promoting the oxygen reduction reaction (ORR) in fuel cells. However, methods to further reduce the ORR overpotential and improve related kinetics remain to be developed. This study reports that N-doped graphene frameworks (NGFs) synthesized from the rapid pyrolysis of solid glycine particles in the presence of sodium carbonate, display an extremely large specific surface area (1760 m(2) g(-1)) and a graphitic-N-dominant C-N configuration. The NGFs can efficiently catalyze the electrochemical reduction of molecular oxygen into water following a 4e pathway, with a low overpotential (0.98 V of onset potential vs. RHE), very high kinetic limiting current density (16.06 mA cm(-2)), and turnover frequency (121 s(-1)), much better than the commercial Pt/C catalyst.
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China. zpzhu@sxicc.ac.cn zhengjf@sxicc.ac.cn and University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: H J
authors.initials: HJ
authors.lastname: Cui
authors.affiliation: Fuel Cell System and Engineering Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
authors.forename: H M
authors.initials: HM
authors.lastname: Yu
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China. zpzhu@sxicc.ac.cn zhengjf@sxicc.ac.cn.
authors.forename: J F
authors.initials: JF
authors.lastname: Zheng
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China. zpzhu@sxicc.ac.cn zhengjf@sxicc.ac.cn.
authors.forename: Z J
authors.initials: ZJ
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China. zpzhu@sxicc.ac.cn zhengjf@sxicc.ac.cn and University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Y Y
authors.initials: YY
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China. zpzhu@sxicc.ac.cn zhengjf@sxicc.ac.cn.
authors.forename: S P
authors.initials: SP
authors.lastname: Jia
authors.affiliation: Fuel Cell System and Engineering Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
authors.forename: J
authors.initials: J
authors.lastname: Jia
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China. zpzhu@sxicc.ac.cn zhengjf@sxicc.ac.cn.
authors.forename: Z P
authors.initials: ZP
authors.lastname: Zhu