球磨制备C/CoPc复合材料电催化CO_(2)还原反应

Preparation of C/CoPc Composites by Ball Grinding for Electrocatalytic Reduction of CO_(2)

电催化CO_(2)还原(CO_(2)RR)可以将大气中的CO_(2)有效转化为CO或碳氢化合物等一系列增值化学品,可有效缓解温室效应导致的环境问题。酞菁钴(CoPc)因其优异的二氧化碳还原产物选择性,近年来被广泛应用于电催化CO_(2)RR反应中,然而,CoPc自身的不良导电影响了其催化活性。为此,选用CoPc及简单易得的乙炔炭黑(C)通过简便球磨法制备得到乙炔炭黑包裹的CoPc催化剂(CoPc/C),将其置于DMF中进行搅拌处理来制备CoPc/C_(s)。在0.1 mol/L KHCO_(3)中,CoPc/C_(s)表现出最好的电催化CO_(2)还原性能,其过电位低至190 mV,在-0.6~-0.9 V vs RHE的宽电势下CO的法拉第效率高于90%,为简便制备高性能酞菁类催化剂提供了一种新思路。

Electrocatalytic reduction of CO_(2)(CO_(2)RR)can effectively convert atmospheric CO_(2) into a series of value-added chemicals such as CO or hydrocarbons,which can effectively alleviate environmental problems caused by the greenhouse effect.Cobalt phthalocyanine(CoPc)has been widely used in electrocatalytic CO_(2)RR reaction in recent years due to its excellent selectivity of carbon dioxide reduction products.However,poor conductivity of CoPc itself affects its catalytic activity.To this end,we selected CoPc and easy to obtain acetylene carbon black(C)by simple ball milling method to prepare CoPc/C catalyst coated with acetylene carbon black(CoPc/C),and put the CoPc/C in DMF to prepare CoPc/C_(s)by stirring treatment.In 0.1 mol/L KHCO_(3),CoPc/C_(s) showed good electrocatalytic performance of CO_(2) reduction,and its overpotential was as low as 190 mV,and the Faraday efficiency of CO was more than 90%at the wide potential of-0.6~-0.9 V vs RHE.It provides a new idea for the simple preparation of high performance phthalocyanine catalysts.