Metal-carbide Embedded Carbons Materials And Applied As Highly Efficient Electrochemical Catalysts For Water Splitting

Viologens are a class of compounds having a structure similar to 1,1'-dialkyl-4,4'-bipyridine,and in particular have significant electrochromic properties in reversible redox processes and as electron transfer sequences,The strong electron acceptability of the medium has been paid more and more attention.And also acts as an acceptor in the solid state charge transfer complex of electron and ionic conductors.The neutral form of Viologens has chemical reactivity and strong reducing agents.Due to these special properties,Viologens modified materials have been used in different applications such as mediators,electrochromic displays,bioelectronic devices and functional electrode materials.With the reduction of petroleum fuels and its environmental pollution,hydrogen as a new energy is the most ideal alternative to fossil fuels,and electrochemical hydrogen production is expected to large-scale production of hydrogen the most likely method,molybdenum carbide due to its lattice The structure of platinum material with the best catalytic performance has become a popular material.In this paper,the positive and excellent oxygen reduction properties of bipyridine structure on Viologens and the preparation of two-dimensional nitrogen-doped carbon The potential of the material is introduced into the thin film and the nanosheet material by using the electrochemical violet polymer thin film and the linear polyphenylene modified graphene as the carbon skeleton and the carbon source and the functional site to uniformly introduce the metal anion by the ion exchange.Doped carbon nanocomposites were prepared by ion-exchange method,and nitrogen-doped molybdenum disulfide carbon flake composites were prepared by ion-exchange method.It can be used in electrochemical catalytic hydrogen production and energy storage.The specific research contents are as follows:1)CPV was synthesized from polyphenylene vinylene(CPO)on ITO by electro-polymerization and different thickness of CPV was obtained by different scanning cycles.CPV was obtained by ultrasonic glass and CPV was centrifuged.After a simple ion exchange,the CPV in the anion exchange into phosphomolybdic acid and sodium tungstate polyanions and molybdate anion.Finally,CPV-Mo,CPV-W,and CPV-MoO4-polymers with metal anions were obtained by filtration and washing.The CPV-Mo or CPV-W was pyrolyzed at 800-1000 ? in a nitrogen atmosphere to obtain carbon black carbon-carbon thin films Mo2C @ NPCF and W2 @ NPCF.The CPV-MoO4-precursor was reduced by sodium sulfide to obtain CPV-MoS3 and then heat-treated at high temperature to obtain MoS2 @ NCF thin film of nitrogen-doped molybdenum sulfide carbon material.(2)Preparation of linear bipyridine-based polymer-modified graphene(BGO)using amino-modified graphene oxide as the base material.Carbide or sulfide graphene composites were prepared as in the previous chapter.(3)Finally,the porphyrin and positively charged phosphorus were prepared by using benzo-porphyrin and 1,2-bis(diphenylphosphino)ethane to prepare the porous polymer.Then the coordination metal ions and the ion-exchange were used to prepare the multi-Co-doped porous polymer.