| 초록 |
Much attention has been paid to transition metal nitrides as a possible replacement of Pt-group metal catalysts. Recently, early transition metal nitrides, oxynitrides and carbonitrides are used as oxygen reduction reaction (ORR) catalysts. Here, three different transition metal nitrides (Mo2N, W2N, NbN) were prepared by simple urea glass route, then compared their physical and electrochemical properties using XRD and half cell test (cyclic voltammetry and linear sweep voltammetry) respectively. In CV results, W2N and NbN showed good electrochemical stability in the potential range of ORR compared to the Mo2N which exhibited clear corrosion current originated from transformation of nitride to oxide. On the other hand, Mo2N showed relatively high electrochemical activity for ORR than W2N and NbN in LSV results. |
