Synthesis And Electrocatalytic Performance Of Organic Framework Materials Based On Ferrocene Metal

Metal Organic Frameworks(MOFs)combine the advantages of inorganic heterogeneous catalysts and inorganic homogeneous catalysts,and can be used as a good platform for obtaining high electrocatalytic performance and studying electrocatalytic mechanism.Ferrocene group has good electrical conductivity and excellent chemical stability,1,1’-ferrocene dicarboxylic acid(H2Fc)as ligand can provide theoretical and experimental basis for the synthesis of MOFs electrocatalysts with excellent catalytic performance.On this basis,a series of ferrocene-based electrocatalysts were synthesized by simple hydrothermal method,and the internal relationship between the composition-structure of the electrocatalysts and the electrocatalytic activity was preliminarily revealed.The specific research contents are as follows:(1)A series of metal-organic framework materials were synthesized by solvothermal method through reasonable design of experimental conditions(reactant concentration,temperature and time).The results showed that the best morphology could be obtained when DMF:MeOH was 2:1.Under the same conditions,the influence of different metal ions on electrocatalytic performance was explored by changing the types of metal ions.The results showed that the overpotential of the sea urchin-like CoFc-MOF is 248 mV at the current density of 10 mA cm-2 in 1.0 M KOH solution.(2)On the basis of the above research,the influence of the second metal on CoFcMOF was predicted by combining with the guidance of density functional theory(DFT)calculation,including Gibbs free energy diagram and electronic structure of oxygen evolution reaction(OER).The results show that CoxNi1-xFc-MOF has the smallest potential barrier and the best electronic conductivity in OER process.Bimetallic MOFs electrocatalysts was synthesized with cobalt and nickel transition metals as metal sources to further explore the electrocatalytic performance,and the influence of growth on catalytic performance on different substrates was further exploried.The results show that when the ratio of nickel-cobalt is 1/4,the material exhibits excellent electrocatalytic performance,and the overpotential of OER is reduced by about 50 mV compared with that of single metal catalyst.Figure[34]Table[10]Reference[133]...