Electro-catalytic reduction of carbon dioxide on cobalt phthalocyanine/ionic liquid derived fibrillated mesoporous carbon coupled with electrochemical synthesis of zinc-based metal-organic frameworks

Electrochemical CO۲ reduction reaction (CO۲RR) represents a promising method for both renewable energy storage and CO۲ valorization. Therefore, development of low-cost and selective electrocatalysts for CO۲ electroreduction in aqueous media is serious challenging [۱]. Mesoporous materials comprising the carbon family have become the focus of profuse research due to their potential applications as catalysts themselves or catalyst supports. The most popular categories of this family, Ordered Mesoporous Carbons (OMCs), possess a regular array of uniform nanostructured pores. This feature, together with their extraordinary high electrical conductivity and high surface area open up many potential applications in electrocatalysis [۲, ۳]. One of the appealing catalysts for CO۲RR is the hybrid of metal complexes and OMCs. On the other hand, Metal organic frameworks (MOFs) have received much attention in the last two decades in electrochemistry as electro-catalyst, sensor, solar cell and supercapacitor. Among different methods for synthesis of MOFs, electrochemical synthesis has received increasing attention in recent years owing to mild and green conditions [۴]. In this work, we developed a hybrid of cobalt phthalocyanine and Ionic liquid derived Fibrillated Mesoporous Carbon (IFMC) to obtain an efficient electrocatalyst for CO۲RR. The IFMC was synthesized via carbonization of ۱-methyl-۳-phenethyl-۱H-imidazolium hydrogen sulfate (MPIHS) in the presence of ordered mesoporous silica SBA-۱۵ as a structural guide. The main product of the cathodic reaction was carbon monoxide which produced in high current density of ۲۲ mAcm-۲. Efficiency of the cell was further enhanced by electrochemical synthesis of Zn-based MOF in the anodic part of the electrolysis cell in eco-frendily and mild solution.

کلیدواژه ها:

Metal Organic framework (MOF) ، Ionic liquid derived Fibrillated Mesoporous Carbon (IFMC) ، Ordered Mesoporous Carbon (OMC) ، Electrocatalyst ، Electrocatalytic CO۲ reduction reaction (CO۲RR)