Application Of MoN And VN Modified Anodes In Microbial Fuel Cells

Microbial Fuel Cells(MFCs)are a kind of green,environment-friendly and pollution-free device which can convert chemical energy into electric energy by catalyzing the decomposition of organic matter in the anode by electricity-producing microorganisms.It provides a solution to the environmental crisis and energy crisis currently faced with.However,the application of microbial fuel cells is still limited by many factors,such as low power generation efficiency and high cost.The performance of anode material is the key factor affecting the performance of microbial fuel cell.Transition metal nitrides have the electrical conductivity and excellent electrocatalytic activity of precious metals,and are much lower than precious metals in price,but also have a higher melting point,better biological compatibility and so on.It is a very excellent anode material.In this study,carbon cloth electrode modified by Mo N nanoarray and VN nanoparticles was selected as anode material,which effectively improved the electrochemical performance of the anode,and enhanced the electron transfer efficiency and electrocatalytic capacity.At the same time,the maximum output voltage of Mo N is 0.60 V,higher than that of carbon cloth 0.50 V,Chemical Oxygen Demand removal rate is 88%,higher than that of carbon cloth 78%,Coulomb efficiency is 33%,higher than that of carbon cloth 23%.The maximum output voltage of VN is 0.64 V,higher than that of carbon cloth 0.57 V.The Chemical Oxygen Demand removal rate of VN reaches 95%,which is higher than89% of CC under the same conditions.The Coulomb efficiency of VN is the highest 46%,which is 1.64 times of 28% of CC.At the same time,the highest degradation rate of VN on aniline can reach 87% when aniline solutions are separately prepared from high concentration of 2500 mg/L to low concentration of 250 mg/L.In conclusion,Mo N and VN can effectively improve the electrochemical performance of the anode of the microbial fuel cell,enhance the ability of the microbial fuel cell to generate electricity and degrade organic matter,and provide an effective possibility for the industrialization of the microbial fuel cell.