Application Of Co-containing MOF And Its Derivatives In Energy Environment Materials

The metal-organic framework material is a novel composite porous material which is formed by linking inorganic metal ions and organic ligands.Not only does the material have a large specific surface area,its pore size can be adjusted,but it can also be functionally modified.These unique properties make it a good application prospect in many fields.MOFs derivative materials possess all the characteristics of MOFs,and due to their large specific surface area,they are widely used as precursor materials in the emerging energy field.According to different requirements,other metal ions are doped into the precursor,and the doped mixture is annealed.Finally,this material becomes an electrocatalyst for electrochemical research.The MOFs material has adjustable pore size and functional modification,which makes it have a broad space for gas separation and capture.In this paper,the application of MOFs materials and their derivatives in the oxygen evolution reaction and the adsorption and separation of CO2,n-butane and isobutane gases were studied.The specific content includes:?1?ZIF-67 was used as the precursor and ruthenium chloride was used as the ruthenium source.Firstly,the Ru exchanged ZIF-67 amorphous composite was prepared.After annealing,the Co-doped nanorod electrocatalyst was formed.The XRD analysis was carried out to understand its specific composition.The catalytic activity sources were further analyzed by XPS,electrochemical performance test and theoretical calculation.The conclusion was drawn that the cobalt-doped RuO₂ nanorods were acidic at 10 mA cm-².Under conditions,it exhibits an extremely low OER overpotential?155 mV?and excellent stability over 50 h at the same current,which outperforms the most active OER electrocatalyst reported so far.?2?Firstly,as amino-functionalized microporous MOFs structure with thermodynamic separation of CO₂/N₂ and CO₂/CH₄ was synthesized,and n-butane/isobutane was also kinetically separated.The MOFs skeleton structure was synthesized by a solvothermal reaction between cobalt nitrate and a diligand of imidazole?im?and 2-aminobenzimidazole?abim?.We characterized the structure of the synthesized product and named it Co₂?abim??im?₃ according to its skeleton structure,and calculated the pore size of Co₂?abim??im?₃ to be about 5.0?.Through the measurement of gas adsorption amount,permeability test and calculation of pore size,etc.,it can be concluded that:Co₂?abim??im?₃ is not only a good candidate for thermodynamic separation of CO₂/N₂ and CO₂/CH₄,but also a good candidate for kinetic separation of n-butane/iso-butane.