Preparation Of Terpyridine Metal-Organocatalyst And Study On Photo-induced Hydrogen Evolution Performance

Hydrogen production by solar photolysis of water is an ideal solution to energy problems,and the most critical factor for photoinduced hydrogen evolution is the use of catalysts.Thus,to obtain efficient and stable water reduction catalysts,it is necessary to invest more energy and broaden on the research of catalyst materials.At present,most of the molecular-level water reduction catalysts was based on noble metals such as Pt,Ru,and Ir.There was few researches on non-precious metal water reduction catalysts such as Cu,Fe,Co,and Zn based on terpyridine.Faced with the urgent needs of the society,the search for efficient,stable and inexpensive photocatalysts have been a research hotspot for researchers,in order to realize the industrial application of photocatalytic hydrogen production.The specific research contents are as follows:1)In the second chapter of this thesis,a series of polyterpyridine ligands with different substitution numbers and orientations were designed and synthesized,and then a series of polyterpyridine copper complexes were prepared by coordination reaction with non-precious metal copper at room temperature.[Ru(bpy)3]Cl2 was added as photosensitizer,triethylamine as electron sacrificial agent,and copperbased complexes as catalysts to form a three-component photocatalytic system,the performances of metal complexes for catalyzing water reduction to hydrogen production were evaluated,and the effects of different structures on light were compared.Effects of catalytic water reduction on hydrogen production performances.At the same time,a series of organic ligands and copper complexes with different carbon chain numbers were prepared,and the effects of different carbon chains on the morphology and catalytic performances of the complex catalysts were investigated.The results show that the 2-S complexes whose microscopic morphology is nanoparticles have a better performance in catalyzing the hydrogen evolution of water,and the TON value can reach 395 mol mg·-1;2)In the third chapter of this paper,three-membered ring supramolecular complexes with V-type bis-terpyridine ligands and Fe2+,Co2+,Zn2+metal ions coordinated and assembled were designed and synthesized,and the chemical structures of the complexes were characterized.The electrochemical properties and photocatalytic hydrogen production performances of the complexes were investigated.The results show that the catalytic’s TON value of S-Fe catalyzed water hydrogen evolution can reach 3185 mol mg·-1,which meant it has an excellent performance compared with the efficiency of the other two complexes in photocatalytic water reduction for hydrogen production.