CoPc/N-C催化剂的制备及CO_(2)电催化还原

Preparation of CoPc/N-C Catalyst and Electrochemical Reduction of CO_(2)

金属酞菁(MePcs)因其易得性和结构可调性被认为是一种很有前途的CO_(2)减排催化剂。其中,酞菁钴(CoPc)基杂化材料用于电催化CO_(2)还原(CO_(2)-RR)近年来受到了广泛关注。通过制备简便的2-甲基咪唑锌盐MOF材料为前驱体,N_(2)气氛下热解后的N-C作为载体,在DMF的超声作用下与CoPc混合制备CoPc/N-C。在三电极体系下,0.1 mol/L KHCO_(3)电解液中,CoPc/N-C表现出较好的CO_(2)电催化还原为CO的性能,过电位低至190 mV,在电位-0.7~-1 V vs RHE电势区间表现出较高的CO法拉第效率(>85%)且具有较好的稳定性,其优异的电催化CO_(2)还原性能主要归因于复合材料中CoPc与N-C载体之间的协同作用。

Metal phthalocyanines(MePcs) have been considered as promising catalysts for CO_(2) emission reduction due to accessibility and structural tunability.Among them,cobalt phthalocyanine(CoPc) based hybrid material for electrocatalytic CO_(2) reduction(CO_(2)-RR) has received extensive attention in recent years.Herein,CoPc/N-C was prepared by mixing CoPc under ultrasonic of DMF with N-C carrier which was pyrolyzed via 2-methylimidazole zinc salt MOF material as the precursor under N_(2) atmosphere.In a three-electrode system,the CoPc/N-C exhibits excellent performance for reducing CO_(2) to CO with low overpotential 190 mV,Faraday efficiency of CO(FECO) exceeded 85% over a wide potential range from-0.7~-1 V vs RHE and remarkable stability in the 0.1 mol/L KHCO_(3) electrolyte.The excellent electrocatalytic performance could be obtained due to the synergistic effect on the interface of CoPc and N-C.