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Template synthesis of core-shellWS2@N/C nanocage Multifunctional Electrocatalysts forDSSCs,ORR and OER

  Ms. Xiaohui

Due to its unique characteristics of large specific surface area of transition metal dihalides (TMDs) and clear hollow metal-organic framework (MOF), are widely used in dye sensitized solar cells (DSSCs), oxygen reduction (ORR), oxygen evolution reaction (OER) and other fields.2D transition metal dichalcogenides (TMDs) analogous structure like graphite, it structure is composed of three atomic layers, a W layer sandwiched between two S layers, and the triple la yers are stacked by weak van der Waals interaction.[1]Metal-organic framework (MOF) synthesized by the assembly of metal nodes and organic linkers, have emerged as promising materials for diverse applications due to their high porosity and ultrahigh surface area.[2]Calcinate the MOF material at high temperature,get the N-doped hollow carbon nanocages.TMDs combined with MOF tinplating synthesis of few-layered WS2 Nanoplates confined in Metal-organic framework Nanocaqes for dye-sensitized solar cells as the counter electrode.[3] N/C hollow metal-organic frame structural materials were prepared and used as templates to grow WS2 core-shell and encapsulated them in MOF with a W-N interfacial coupling center.During the pyrolysis process, after carbonization, ZIF-67 becomes Co, N-doped C material, which effectively inhibits the growth of WS2 and forms the multi-functional group WS2@N/C material.Among them, the WS2core- shell structure has better catalytic performance than the layered structure.