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Co-modified MoO2 nanoparticles highly dispersed on N-doped carbon nanorods as anode electrocatalyst of microbial fuel cells

Li, Xin, Hu, Meihua, Zeng, Lizhen, Xiong, Juan, Tang, Binhao, Hu, Zhangmin, Xing, Lidan, Huang, Qiming, Li, Weishan
Biosensors & bioelectronics 2019 v.145 pp. 111727
anodes, bacteria, bacterial culture, biosensors, carbon, catalysts, catalytic activity, electricity generation, electrochemistry, high-throughput nucleotide sequencing, microbial fuel cells, molybdenum, nanoparticles, nanorods, redox reactions, wastewater treatment
Cobalt-modified molybdenum dioxide nanoparticles highly dispersed on nitrogen-doped carbon nanorods (Co–MoO₂/NCND), are synthesized from anilinium trimolybdate dihydrate nanorods, for the performance improvement of microbial fuel cell based on a mixed bacterial culture. Electrochemical measurements demonstrate that the as-synthesized Co–MoO₂/NCND exhibits excellent electrocatalytic activity for the charge transfer on anode, providing the cell with a maximum power density of 2.06 ± 0.05 W m⁻², which is strikingly higher than the bare carbon felt anode (0.49 ± 0.04 W m⁻²). The excellent performance of Co–MoO₂/NCND is ascribed to the increased electronic conductivity of carbon nanorods by N-doping, the high ability of MoO₂ to enrich electroactive bacteria, as demonstrated by high-throughput sequencing, and the enhanced activity of MoO₂ by Co-modifying toward redox reactions in electroactive bacteria. This report provides a new concept of anode electrocatalyst fabrications for the application of microbial fuel cells in electricity generation and wastewater treatment.