Effects of CoO modified with MoS on microbial fuel cells performance.

In this study, CoO@MoS is prepared as anodic catalytic material for microbial fuel cells (MFCs). As the mass fraction of MoS is 20%, the best performance of CoO@MoS composite catalytic material is achieved, and the addition of MoS enhances both the electrical conductivity and catalytic performance of the composite catalyst. Through the structural characterization of CoO@MoS composite catalytic material, nanorod-like CoO and lamellar MoS interweaved and stacked each other, and the agglomeration of CoO is weakened. Among the four groups of single-chamber MFCs constructed, the CoO@MoS-MFC shows the best power production performance with a maximum stable output voltage of to 539 mV and a maximum power density of up to 2221 mW/m. Additionally, the ammonia nitrogen removal rate of the MFCs loaded with catalysts is enhanced by about 10% compared with the blank carbon cloth MFC. Overall, the findings suggest that CoO@MoS composite catalysts can significantly improve the performance of MFCs, making them more effective for both energy production and wastewater treatment.