| 초록 |
Water splitting is a powerful method to store clean, renewable energy in the form of chemical bond. However, the whole process is limited by slow kinetics of oxygen evolution reaction (OER). Currently, precious-metal electrocatalysts such as IrO2 and Pt are reported to have good activity, but their low abundance and high cost prohibit a large-scale application. Therefore, there are many researches to develop inexpensive and highly active OER catalysts. In this study, we synthesized first-law transition-metal based catalysts in uniform size and shape regardless of the element using modified (co)precipitation method, making it possible to compare electrochemical activity of catalysts without the influence of their shape. After finding the most active catalyst, we introduced simple heat treatment as a method of defect engineering in order to improve the activity of the catalyst. |
