Synthesis Of Metal Phthalocyanine Nanomaterials And Application Of Electrocatalytic Reduction Of Carbon Dioxide

The development of industrialization has promoted tremendous changes in human life,and it has also caused certain negative impacts.The burning of fossil fuels emits a large number of pollutants,which leads to serious air pollution.The greenhouse has caused great concern.Carbon dioxide?CO₂?are widely studied,and electrocatalytic reduction of carbon dioxide?CO₂?into hydrocarbons is an attractive method for mitigating energy and environmental problems.Among the reported electrocatalysts,there are many metals and alloys,and there are few metal complexes.This paper mainly introduces the performance of electrocatalytic reduction of CO₂ by metal phthalocyanine complexes.The details are as follows:A single copper phthalocyanine and tin phthalocyanine complex were synthesized by solvothermal method,and three kinds of copper-tin phthalocyanine composites were synthesized by adjusting the ratio of copper salt,tin salt and phthalocyanine.The materials were characterized by SEM,TEM,XRD,XPS.The electrocatalytic properties of five materials for CO₂ electroreduction were studied by CV and LSV.The results show that the five materials all have catalytic effect on the electroreduction of CO₂.The composite PcCu_0.8Sn_0.2.2 has the highest current density and the smallest overpotential.And the Faraday efficiency of the formate ion obtained by i-t curve and ion chromatography is also the maximum and good stability for PcCu_0.8Sn_0.2.The EIS and electroactive area tests revealed that the high electrocatalytic activity of PcCu_0.8Sn_0.2.2 is related to the high electrical conductivity and large electroactive area of the material,due to the synergistic catalysis of copper phthalocyanine and tin phthalocyanine.The mechanisms of electrocatalytic reduction of CO₂ by five materials were inferred by the Tafel slope test.Based on the synthesis of copper phthalocyanine,a single lead phthalocyanine complex and three copper-lead phthalocyanine composites were synthesized.The materials were characterized and the properties of electrocatalytic reduction of CO₂ were further studied.The results show that the composite PcCu_0.8Pb_0.2.2 has the best performance,good electrolytic stability,high catalytic activity and high Faraday efficiency of the product formic acid,high electrocatalytic activity is related to the high electrical conductivity and large electroactive area of the material,attributed to the synergistic catalysis of copper phthalocyanine and lead phthalocyanine.The mechanisms of electrocatalytic reduction of CO₂ by five materials were inferred by the Tafel slope test.