| 초록 |
The electrochemical oxygen reduction is an important reaction to be used in both the fuel cells in the alternative energy conversion fields and hydrogen peroxide production in the environmental fields. Generally, the electrocatalytic oxygen reduction reaction (ORR) can proceed through one of two competing reactions in aqueous conditions: the 4-electron reaction to convert O2 to H2O or the 2-electron process to generate hydrogen peroxide (H2O2). As a result, accurate selectivity calculation is a considerable critical issue in this field. A common way is the rotating disk electrode method, which can be estimated the ORR selectivity through the Koutecky-Levich equation. However, this method can easily vary the ORR selectivity as a function of experimental conditions, which gives rise to the difference between theoretical and experimental values. Here, we attempt to optimize experimental conditions to obtain accurate and exact ORR selectivity through systematic approaches. |
