title: Hierarchical Metal-Free Nitrogen-Doped Porous Graphene/Carbon Composites as an Efficient Oxygen Reduction Reaction Catalyst.
abstract: Hierarchical nitrogen-doped porous graphene/carbon (NPGC) composites were fabricated by a simple and nontemplate method. The morphology characterizations demonstrate that reduced graphene oxide was successfully coated by the carbon derived from glucose, and a well-organized and interpenetrated hierarchical porous structure of NPGC was formed after pyrolysis at 950 °C. Notably, the prepared material, denoted as NPGC-950, has superlarge specific surface area (1510.83 m(2) g(-1)) and relatively high content percentage of pyridinic and graphitic nitrogen. As an efficient metal-free electrocatalyst, NPGC-950 exhibits a high onset potential (0.91 V vs RHE) and a nearly four-electron pathway for oxygen reduction reaction in alkaline solution as well as stronger methanol tolerance and better long-term durability than commercial Pt/C. In view of these excellent features, the obtained hierarchical N-doped metal-free porous carbon material is a promising catalyst for oxygen reduction reaction and could be widely applied in industry.
authors.affiliation: National Fundamental Research Laboratory of New Hazardous Chemicals Assessment and Accident Analysis, Institute of Applied Electrochemistry, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Bao
authors.initials: B
authors.lastname: Men
authors.affiliation: National Fundamental Research Laboratory of New Hazardous Chemicals Assessment and Accident Analysis, Institute of Applied Electrochemistry, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Yanzhi
authors.initials: Y
authors.lastname: Sun
authors.affiliation: National Fundamental Research Laboratory of New Hazardous Chemicals Assessment and Accident Analysis, Institute of Applied Electrochemistry, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Mujie
authors.initials: M
authors.lastname: Li
authors.affiliation: National Fundamental Research Laboratory of New Hazardous Chemicals Assessment and Accident Analysis, Institute of Applied Electrochemistry, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Chaoqun
authors.initials: C
authors.lastname: Hu
authors.affiliation: National Fundamental Research Laboratory of New Hazardous Chemicals Assessment and Accident Analysis, Institute of Applied Electrochemistry, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Man
authors.initials: M
authors.lastname: Zhang
authors.affiliation: National Fundamental Research Laboratory of New Hazardous Chemicals Assessment and Accident Analysis, Institute of Applied Electrochemistry, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Linan
authors.initials: L
authors.lastname: Wang
authors.affiliation: National Fundamental Research Laboratory of New Hazardous Chemicals Assessment and Accident Analysis, Institute of Applied Electrochemistry, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Tang
authors.affiliation: National Fundamental Research Laboratory of New Hazardous Chemicals Assessment and Accident Analysis, Institute of Applied Electrochemistry, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Yongmei
authors.initials: Y
authors.lastname: Chen
authors.affiliation: National Fundamental Research Laboratory of New Hazardous Chemicals Assessment and Accident Analysis, Institute of Applied Electrochemistry, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Pingyu
authors.initials: P
authors.lastname: Wan
authors.affiliation: National Fundamental Research Laboratory of New Hazardous Chemicals Assessment and Accident Analysis, Institute of Applied Electrochemistry, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Junqing
authors.initials: J
authors.lastname: Pan
keywords: graphene/carbon composites; hierarchical porous structure; metal-free; nitrogen doped; oxygen reduction reaction