Study On Preparation And Properties Of Transition Metal Phthalocyanine Catalysts

Photocatalysis and electrocatalysis are important potential means to solve energy crisis and environmental pollution.In the process of photocatalysis and electrocatalysis,efficient and stable catalytic materials are undoubtedly the key.The main problem facing photocatalysts is to develop non-Ti O₂photocatalyst systems to effectively utilize sunlight.The major problem for electrocatalysts is the development of inexpensive non-precious metal catalyst systems to achieve commercial application as soon as possible.Therefore,the development of new and efficient photocatalytic materials system is an inevitable trend and the key to industrialization to solve the energy crisis and environmental pollution.Metal phthalocyanine shows potential application prospect in the above fields due to its unique structure.This paper contains the following two aspects of work:（1）FePc@NF composite catalyst was prepared by solvothermal growth of ferric phthalocyanine uniformly on nickel foam.The catalyst showed good electrochemical oxygen evolution performance.In 1.0 M KOH electrolyte,289 m V low overpotential and 49.9 m V dec^-1Tafel slope were shown at a current density of 10 m A cm^-2.The excellent electrochemical performance comes from the homogeneous dispersion of phthalocyanine nanostructures on the surface of nickel foam,which avoids the common agglomeration problem of such catalysts and provides a large number of active sites for OER reaction,thus improving the catalytic performance of the system.（2）Organic-inorganic heterostructures of CuPc/BiOCl were prepared by a two-step solvothermal method.Compared with BiOCl,CuPc/BiOCl heterostructures showed higher photocatalytic properties for MO decomposition under visible light.Under visible light irradiation,the enhanced photocatalytic performance of BiOCl is not only due to the good match with CuPc band structure,which promotes the separation and transfer of photogenerated electron-hole pairs,but also due to the intrinsic absorption of CuPc in the red/near infrared spectrum region,which leads to the overall enhancement of the photocatalytic activity of CuPc/BiOCl heterostructure in the whole absorption spectrum.