Preparation Of MOF Derived Hollow Nanomaterials As Electrocatalysts For The Hydrogen Evolution Reaction

The "energy crisis" is one of the greatest challenges of human society in the 21st century.Therefore,human beings urgently need to find new energy sources to replace traditional fossil energy sources.Development of fuel cell and other clean energy chemical technology to achieve the conversion and storage of renewable energy is an effective way to solve this problem.The development of an efficient and inexpensive catalyst for hydrogen evolution reaction is the core of this technology.Hollow nanomaterials have attracted more and more attention in the field of catalysis due to their unique structural advantages.Compared with traditional nanomaterials,MOF-derived hollow materials are further developed to meet the needs of catalytic hydrogen evolution reaction.MOF-derived methods make the synthesis of hollow nanomaterials have more unique advantages:simple synthesis methods,controllable initial and final morphology,easy doping of heteroatoms and easy establishing structural advantages.Hence the hollow nanomaterials derived from MOF have high specific surface area,high stability and adjustable porous structure,which are very promising catalytic materials.Based on the above research background,we studied MOF derived materials as the research object.and explore the cavitation preparation method of MOF derived materials and the electrocatalytic performance of hydrogen evolution reaction.The main tasks as follows:1.Co-MOF nanospheres are self-assembled with cobalt acetate and HL10 nitrogen-rich organic ligands as seed agents,and solvothermally ion-exchanged to obtain CoNi-MOF nanocubes.Finally,they are obtained by low-temperature calcining and phosphating CoNiP hollow nanoboxes.As the electrocatalyst for hydrogen evolution reaction(HER),the CoNiP hollow nanoboxes showed the lower overpotential and excellent stability.2.Co-MOF nanospheres were self-assembled by cobalt acetate and HL10 nitrogen-rich organic ligands as precursor materials,adding RuCl3 or FeC13 metal salt aqueous solution for mixing and stirring,through the process of "etching-regrowth",the bimetal mixed CoRu-MOF or CoFe-MOF hollow nanospheres were obtained Similarly,the hollow nanospheres electrocatalyst also exhibits excellent catalytic activity and stability for hydrogen evolution reaction(HER).At the same time,the"etching-regrowth" reaction mechanism was explored.