Porous Carbon-based Hybrid Materials Derived From Metal-organic Frameworks And Their Application On Electrochemical Sensor And Electrocatalytic Oxygen Reduction Reaction

Phenols,such as catechol and hydroquinol,have been designated as preferential contaminant by Chinese,American,European Union.Overuse of fossil energy leads to exhaustion of resource and intensifies greenhouse effect.The society urge the development and employ of clean energy.Therefore,it is been most significant fields for environmental science,energy science and material science to blossom new technology for:?i?the contaminant's monitoring technology of phenols with the characteristics of green,low cost,simple and sensitive and?ii?electrochemistry power source's conversion and storage technologies which could reach the characteristics of clean,high efficient and cheap.In this paper,we focus on development including materials of electrochemical sensor and catalysts of electrocatalytic oxygen reduction,and systematic study for design,preparation and functionalization of materials,conclusion as follow:?1?The Zn-MOF-74 has been synthesized by solvothermal method.Then,as-MOFs is used for template/precursor to prepare porous carbon material via a thermal treatment in Ar atmosphere.The porous carbon material is modified onto electrode for for study of simultaneous determination of catechol?CC?and hydroquinone?HQ?.The results show that the concentration of CC and HQ from 0.50 to 80?mol/L is great linear with their anodic current,respectively.Detection limit of CC and HQ are 0.031and 0.11?mol/L,respectively.?2?Using polyvinyl pyrrolidone as surfactant,nanoscale Co^II-IRMOF-3 has been synthesized successfully via sample refluxing method.As a template,Co^II-IRMOF-3is pyrolyzed in Argon atmosphere and then nanostructured hybrid materials Co/N/C with controllable morphology and well dispersity is prepared.The Co/N/C is applied for the test of oxygen reduction reaction performance in basic solution.A superior electrocatalytic activity for ORR,i.e.,high onset potential?0.91 V?and half-wave potential?0.76 V?,is observed.For long-range cyclic stability,the performance of as-prepared catalyst is better than that of commercial Pt-based catalyst.?3?The Fe,N co-doped porous carbon?Fe/N/C?is synthesized successfully by a pyrolyzing method which bimetallic-Fe^III-IRMOF-3 is heating treatment in Ar atmosphere.The Fe/N/C shows great characteristics,including controllable morphology,uniform elemental distribution and well-defined pore size.The preparation method is simple,low cost and high output.In alkaline medium,the oxygen reduction reaction performance of Fe/N/C is tested.Impressively,the Fe/N/C hybrid exhibits a superior electrocatalytic activity with high onset potential?0.93 V?and half-wave potential?0.78 V?,and excellent stability,which is attributed to the synergistic effect of its high surface to volume ratio,well-defined pore size,multiactive composition,and high exposed catalytic active sites.