title: Enhancing electrocatalytic oxygen reduction on nitrogen-doped graphene by active sites implantation.
abstract: The shortage of nitrogen active sites and relatively low nitrogen content result in unsatisfying eletrocatalytic activity and durability of nitrogen-doped graphene (NG) for oxygen reduction reaction (ORR). Here we report a novel approach to substantially enhance electrocatalytic oxygen reduction on NG electrode by the implantation of nitrogen active sites with mesoporous graphitic carbon nitride (mpg-C3N4). Electrochemical characterization revealed that in neutral electrolyte the resulting NG (I-NG) exhibited super electrocatalytic activity (completely 100% of four-electron ORR pathway) and durability (nearly no activity change after 100,000 potential cyclings). When I-NG was used as cathode catalyst in microbial fuel cells (MFCs), power density and its drop percentage were also much better than the NG and Pt/C ones, demonstrating that the current I-NG was a perfect alternative to Pt/C and offered a new potential for constructing high-performance and less expensive cathode which is crucial for large-scale application of MFC technology.
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China.
authors.forename: Leiyu
authors.initials: L
authors.lastname: Feng
authors.forename: Lanqin
authors.initials: L
authors.lastname: Yang
authors.forename: Zujing
authors.initials: Z
authors.lastname: Huang
authors.forename: Jingyang
authors.initials: J
authors.lastname: Luo
authors.forename: Mu
authors.initials: M
authors.lastname: Li
authors.forename: Dongbo
authors.initials: D
authors.lastname: Wang
authors.forename: Yinguang
authors.initials: Y
authors.lastname: Chen