Construction And Application Of Cobalt Manganese Oxide/Carbon Nanotube Composites

Hydrogen is a clean energy source.Cracking of water is an important way to produce high-purity hydrogen in large quantities.The dynamic overpotential will cause great additional energy consumption,which needs to be reduced by a certain catalyst.At present,the process relies heavily on noble metal catalysts.Therefore,the development of efficient,cheap and stable non noble metal catalysts is of great significance.In this paper,cobalt,manganese oxide/MWCNTs composites are prepared and prepared respectively,their applications in oxygen evolution catalysts and supercapacitors are explored,and the influence and mechanism of various factors on their properties are discussed.In this paper,cobalt/MWCNTs composites are prepared by condensing reflux method,and cobalt/MWCNTs composites are used as the electrolysis catalyst for oxygen evolution.The influence mechanism of different precursors on the oxygen evolution of cobalt oxide/MWCNTs composites was proposed.The research shows that cobalt oxide/MWCNTs composites are prepared by CoO/MWCNTs,Co₉S₈/MWCNTs and CoSe/MWCNTs as precursors,and have good catalytic activity and stability for oxygen evolution.The active substances in the catalytic reaction of oxygen evolution are cobalt oxide.ZIF-67/MWCNTs composites with different cobalt content are prepared by using MWCNTs loaded cobalt hydroxyl acetate as precursors,and the oxygen evolution catalysis experiments are carried out after calcining,and the related mechanism was discussed.The study shows that by comparing the catalytic performance of ZIF-67/MWCNTs composites with different cobalt content,it is found that the increase of cobalt content increases the number of active sites and improves the catalytic activity of oxygen evolution of ZIF-67/MWCNTs composites.The above results provide valuable guidance for designing oxygen evolution catalysts and improving catalytic performance.Manganese oxide/MWCNTs composites with different oxidation degrees are prepared and prepared.The electrochemical properties of manganese oxide/MWCNTs composites with different oxidation degrees are studied respectively as supercapacitors.The results show that the specific electrical capacitance of MnO,Mn₃O₄ and MnO₂/nanotubes increases gradually and has good application prospects.