| 초록 |
Carbon dioxide (CO2) has been considered as a green-house gas which causes environmental problems such as global warming. Meanwhile, CO2 is a sustainable carbon feedstock which can be used to produce value-added products. To date, the field of electrochemical CO2 reduction has attracted interest because it can convert CO2 to other useful compounds. However, electrochemical reduction of CO2 has occurred by supplying continuous electrical power and applying overpotential. Here, we have prepared Al electrode to use sacrificial electrode. The standard reduction potential of Al is – 1.66 V which has more negative potential than other standard reduction potential of CO2. Namely, Al electrode is oxidized to Al3+ ions and CO2 is reduced to value-added compounds (CH4, C2H4). Since this reaction is spontaneous reaction, applying continuous overpotential is not essential. The changes of electrodes are characterized by X-ray diffraction (XRD) and X-ray photo electron spectroscopy (XPS). The electrochemical performances are evaluated by linear sweep voltammetry (LSV). Also, the products of reaction are characterized by Gas chromatography (GC) and Liquid chromatography (LC). |
