• 文献标题:   Hydrogen peroxide generation in microbial fuel cells using graphene-based air-cathodes
  • 文献类型:   Article
  • 作  者:   DONG H, LIU XW, XU T, WANG QY, CHEN XH, CHEN SN, ZHANG HL, LIANG P, HUANG X, ZHANG XY
  • 作者关键词:   microbial fuel cell, graphenebased aircathode, hydrogen peroxide, power generation, wastewater treatment
  • 出版物名称:   BIORESOURCE TECHNOLOGY
  • ISSN:   0960-8524 EI 1873-2976
  • 通讯作者地址:   Tsinghua Univ
  • 被引频次:   9
  • DOI:   10.1016/j.biortech.2017.09.158
  • 出版年:   2018

▎ 摘  要

Utilization of two-electron oxygen reduction reaction (ORR) in bioelectrochemical systems (BES) is a novel way to generate H2O2 from wastewater, and cathode catalyst is a key factor affecting ORR performance. Here, the catalytic performance of plain graphene, oxidized graphene and graphene oxide (GO) in microbial fuel cells (MFCs) and the influence of oxygen-containing functional groups are reported. Oxidized graphene air-cathode had 78% and 131% higher H2O2 productions than plain graphene cathode respectively in an abiotic reactor and an MFC. GO showed nearly no H2O2 production in the tests. XPS revealed that oxygen atomic fraction of oxidized graphene reached 5.7%, mostly in the form of C-O-C. These results show that oxidized graphene had good catalytic performance for H2O2 production, and oxygen-containing functional groups, especially C-O-C could significantly enhance its performance, but overoxidation worked adversely. Meanwhile, using oxidized graphene air-cathode could realize simultaneous wastewater treatment, power output and H2O2 generation in MFCs.