| 초록 |
Electrochemical reduction of carbon dioxide is promising way to convert Carbon dioxide into valuable products. Among these products, formate is economically viable due to its simple reaction pathway and relatively high energy value. Therefore, tin-based materials have received attention as they show high performance in formate production. In this work, we synthesized metastable tin oxide electrode by anodization and thermal annealing. Tin oxide electrode enhances its electrochemical double layer capacitance by anodization and becomes highly crystalline after thermal annealing. Electrochemical measurements show its high faradaic efficiency of 60% for CO2 reduction to formate at -0.8 V. It also exhibits a excellent formate partial current density of 33.66mA/cm2. According to various spectroscopic analyses, tin oxide remains its metastable SnO2 phase at quite reductive potential of -0.8 V due to its cyrstalline structure by thermal annealing. |
