• 文献标题:   Improved cathodic oxygen reduction and bioelectricity generation of electrochemical reactor based on reduced graphene oxide decorated with titanium-based composites
  • 文献类型:   Article
  • 作  者:   LI M, BI YG, XIANG L, CHEN XT, QIN YJ, MO CH, ZHOU SQ
  • 作者关键词:   microbial fuel cell, reduced graphene oxide, bioelectricity generation, electron transfer, oxygen reduction reaction
  • 出版物名称:   BIORESOURCE TECHNOLOGY
  • ISSN:   0960-8524 EI 1873-2976
  • 通讯作者地址:   Jinan Univ
  • 被引频次:   2
  • DOI:   10.1016/j.biortech.2019.122319
  • 出版年:   2020

▎ 摘  要

A kind of reduced graphene oxide decorated with titanium-based (RGO/TiO2) composites are successfully synthesized and employed in this current study as a novel nonprecious metal catalyst for enhancing bioelectricity generation and cathodic oxygen reduction reaction (ORR) in single chamber microbial fuel cells (MFCs). Compared with commercial Pt/C, RGO/TiO2 shows obviously enhanced oxygen reduction reaction activity due to the appropriately-permeated, large electrochemical active area, enough exposure of electrocatalytic active sites of RGO/TiO2. The air-cathode MFC with RGO/TiO2-1 cathode achieves 1786.7 mW m(-3) of power density, 86.7% +/- 1.2% of COD removal and 31.6% +/- 1.1% of CE, which are higher than commercial Pt/C. Moreover, RGO/TiO2-1 cathode exhibits high-effective electrocatalytic activity, and the power density of RGO/TiO2-1 can keep a stable level and only has a minor decline (5.35%) during 30-cycles operation. These results indicate that RGO/TiO2-1 is a potential cathode catalyst, markedly enhancing cathode ORR, wastewater treatment efficiency, and bioelectricity generation of MFC.