Study On The Constructed Of Phenol Fuel Cell By MWCNTs Nanocomposites As Anode Catalyst

In recent years,environmental pollution,energy crisis and other issues have increasingly restricted the development of human society.Biofuel cells have received extensive attention as an alternative ideal clean energy supply device.Based on the excellent physical and chemical properties of carbon-based nanomaterials,they are often used as carrier to support metals and their compounds,and the nanocomposites have greatly improved in electrical conductivity and catalytic activity.In this paper,C0304-MWCNTs,CuO/MWCNTs and MWCNTs/CdS nanowires were prepared by ultrasound-assisted method,solvent thermal method and layer by layer assembly method,respectively.And then,non-enzymatic phenol fuel cells were constructed using these nanocomposites as anode materials.The following is the main research content:(1)Co3O4-MWCNTs nanocomposites were synthesized by ultrasonic assisted method and used as anode catalysts to construct phenol fuel cells.Firstly,the mixed acid treatment is used to increase the dispersibility of multi-walled carbon nanotubes(MWCNTs).MWCNTs and the prepared Co3O4 were uniformly mixed by ultrasonic treatment.Due to the small particle size of Co3O4,Co3O4 was dispersed on the surface of MWCNTs by electrostatic adsorption to prepare Co3O4-MWCNTs nanocomposites.The catalytic effect of the nanocomposite on phenol was tested by cyclic voltammetry.The electrochemical test results show that the Co3O4-MWCNTs nanocomposites have better electrocatalytic oxidation performance for phenol than single Co3O4 or MWCNTs.The phenol/O2 fuel cell was constructed by using Co3O4-MWCNTs as the anode material and electrodepositing the platinum film as the cathode material.The open circuit potential(OCP)of the battery was 0.44 V through the polarization curve.The maximum power density(Pmax)is 0.27 mW·cm-2 at 0.35 V.(2)The CuO/MWCNTs composites were synthesized by solvothermal method at 120℃.The phenol/O2 fuel cells were constructed by using the nanomaterials modified electrode as anode.SEM and TEM results showed that a layer of CuO nanoparticles was coated on the surface of MWCNTs with a small particle size(about 10 nm).Mapping showed that CuO dispersion was very uniform..The effects of different CuO loading,sweeping speed and phenol concentration on the catalytic performance of phenol were investigated by electrochemical investigation.The results show that the phenol fuel cell has an OCP of 0.69 V and provides a Pmax of 0.25 mW·cm-2 at 0.44 V.(3)MWCNTs/CdS nanowires composites were prepared by layer-by-layer assembly of MWCNTs and CdS nanowires.The nanomaterials were used as catalysts to construct phenol fuel cells.The effects of different CdS loadings and different number of assembled layers on the catalytic performance of phenol were investigated by electrochemical investigation.The phenol fuel cell was fabricated with MWCNTs/CdS nanowires as anode material and electro-deposited platinum film(Pt/GCE)as cathode material.The electrochemical test results show that MWCNTs/CdS nanowires exhibits good catalytic performance as an electrocatalytic material.The OCP of the constructed fuel cell is 0.62 V and provides a Pmax of 0.29 mW·cm-2 at 0.56 V.