CoTBrPP-PTAB-Cu 电催化还原 CO₂制甲烷

Using the electricity generated by renewable energy such as wind energy and solar energy to electrocatalyze the reduction of CO₂ into high value-added materials and chemical raw materials is an effective way to achieve carbon balance. By grafting alkynyl polymer on the surface of CoTBrPP metal porphyrin crystal through Sonogashira-Hagihara coupling reaction, a novel CoTBrPP-PTAB-Cu catalyst was synthesized. The catalyst has a high selectivity for methane, and the Faraday efficiency of methane can reach 54.6% when the current density was -200mA/cm². It was found that the surface of metal porphyrin crystal was coated with triacetylene benzene polymer by grafting reaction, which effectively improved the hydrophilic and hydrophobic properties of metal porphyrins, thus reducing HER competition reaction. At the same time, the copper ions introduced in the coupling reaction can interact with the metal ions in the porphyrin center to achieve the regulation of the reduction products.