Study On Preparation Of Glass And Electrocatalytic Oxidation Properties Of Mononuclear Cd/Ni/Co/Cu Complexes And Their Metal-Doped Complexes

CP（Coordination polymer）also contains Metal organic framework compounds（MOFs,Metal-organic frameworks）with topological structure,composition and nature diversity and functional designability and adjustability,and easy to prepare.It has important research value in scientific research and functional application.Scientifically speaking,it is challenging to observe stable liquids because most CP/MOF decompose at Decomposition temperature（Td,Decomposition temperature）<Melting temperature（Tm,Melting temperature）when heated.Therefore,the design of structures regulating CP/MOF provides an opportunity to observe its glass transition process to address this challenge.The vitrification preparation of CP/MOF and the regulation of glassy properties are important subjects,which provide a new method for expanding the structural design and regulation of glass materials.On the application side,CP/MOF is receiving increasing attention in the development of new materials such as electronics and optoelectronics as well as magnetism.Metal materials are one of the most active and durable catalysts for effective electrocatalytic oxidation reactions.Generally,the redox reaction of CP/MOF as catalyst is carried out at the active site of metal complex that can accept or provide electrons.Therefore,the structural characteristics of higher active sites can be obtained based on the regulation of CP/MOF composition and structure.In this paper,the preparation of a significant glass transition performance of the complex,further,the several complex and complex glass electrochemical catalytic oxidation performance of the exploration.In the section of glass preparation,the glass conversion processes of four mononuclear isonicotinic acid metal complexes and metal-doped Cox/Cd1-x（ina）₂（H₂O）₄and Nix/Cd1-x（ina）₂（H₂O）₄complexes were studied by heating.In terms of electrochemistry,through the electrochemical OER/UOR/MOR test of these metal complexes,it is found that the nickel-based complexes involved in this paper show obvious effects in the OER reaction,and try to prepare high efficiency and cheap metal catalysts by improving the above materials.The main chapters are as follows:In chapter 1,the classification,preparation,research status and challenges of CP and CP glass,electrochemical activity of CP（coordination polymer）and its application in OER/UOR/MOR are summarized.This paper briefly introduces the research on glass conversion of bimetallic coordination polymer and its application of electrooxidation properties.Finally,it briefly describes the previous work accumulation of our research group and explains the purpose and significance of this research.In Chapter 2,the glass transition behavior of four single-core CP crystals Cd（ina）₂（H₂O）₄,Ni（ina）₂（H₂O）₄,Co（ina）₂（H₂O）₄,Cu（ina）₂（H₂O）₄was studied by differential scanning calorimeter（DSC）and dynamic mechanics analyzer（DMA）based on isonicotinic acid ligands.The state before and after transformation was tested with PXRD.It is found that Cd（ina）₂（H₂O）₄and Ni（ina）₂（H₂O）₄can be heated to form glass and achieve glass conversion.In addition,OER/UOR/MOR tests were carried out on the crystalline and amorphous（glass）samples involved in this paper to explore the catalytic effect of Ni（ina）₂（H₂O）₄,Co（ina）₂（H₂O）₄.The results show that Ni（ina）₂（H₂O）₄has good OER catalytic performance,and the overpotential reaches 393 m V when the current density is 10 m A?cm^-2.In Chapter 3,bimetallic doped complex crystals Cox/Cd1-x（ina）₂（H₂O）₄and Ni_x/Cd_1-x（ina）₂（H₂O）₄were obtained by solvothermal synthesis.The metal proportion of the complexes was measured by ICP,and the glass transition rule of the metal-doped complexes was revealed by DSC and DMA.The results showed that the Co-doped Co_x/Cd_1-x（ina）₂（H₂O）₄was heated and no glass conversion was found by PXRD test.Ni_x/Cd_1-x（ina）₂（H₂O）₄doped with metal Ni,Ni_0.01/Cd0.₉₉（ina）₂（H₂O）₄sample and Ni_0.03/Cd_0.97（ina）₂（H₂O）₄sample have glass transition phenomenon when the content of metal Ni is less.However,with the increase of nickel content in doping ratio,the glass transition is no longer obvious.The catalytic activity of OER oxidation was tested on bimetallic complex crystals Co_x/Cd_1-x（ina）₂（H₂O）₄and Ni_x/Cd_1-x（ina）₂（H₂O）₄with different proportions.It was found that doping ratio,namely metal ion content,had significant influence on the electrooxidation effect.With the increase of metal Co and Ni content,The catalytic effect showed a law of gradual increase...