One-step ball milling-prepared nano Fe2O3 and nitrogendoped graphene with high oxygen reduction activity and its application in microbial fuel cells

查看全文 作　　者：Xingguo [1]Guo;Qiuying [1]Wang;Ting [1]Xu;Kajia [1]Wei;Mengxi [1]Yin;Peng [1]Liang;Xia [1]Huang;Xiaoyuan [1]Zhang

机构地区：[1]State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China

出　　处：《Frontiers of Environmental Science & Engineering》索引2020年第14卷第2期,共11页

基　　金：the National Natural Science Foundation of China(Grant No.51778326);the special fund of Tsinghua University Initiative Scientific Research Program。 摘　　要：Developing high activity,low-cost and long durability catalysts for oxygen reduction reaction is of great significance for the practical application of microbial fuel cells.The ftill exposure of active sites in catalysts can enhance catalytic activity dramatically.Here,novel Fe-N-doped graphene is successftilly synthesized via a one-step in situ ball milling method.Pristine graphite,ball milling graphene,N-doped graphene and Fe-N-doped graphene are applied in air cathodes,and enhanced performance is observed in microbial fuel cells with graphene-based catalysts.Particularly,Fe-Ndoped graphene achieves the highest oxygen reduction reaction activity,with a maximum power density of 1380±20 mW/m^2 in microbial fUel cells and a current density of 23.8 A/m^2 at-0.16 V in electrochemical tests,which are comparable to commercial Pt and 390%and 640%of those of pristine graphite.An investigation of the material characteristics reveals that the superior performance of Fe-Ndoped graphene results from the full exposure of Fe2O3 nanoparticles,pyrrolic N,pyridinic N and excellent Fe-N-G active sites on the graphene matrix.This work not only suggests the strategy of maximally exposing active sites to optimize the potential of catalysts but also provides promising catalysts for the use of microbial fuel cells in sustainable energy generation. 关键词：MICROBIAL fuel cells Air cathodes NANO FE2O3 and NITROGEN-DOPED GRAPHENE Oxygen reduction reaction

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One-step ball milling-prepared nano Fe2O3 and nitrogendoped graphene with high oxygen reduction activity and its application in microbial fuel cells

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