Pt and Pt-based alloys have demonstrated catalytic responses for AOR . Katan and Galiotto evaluated Pt black for anodic AOR, where they observed the current efficiency of nearly 100 % for N2 production . Vidal-Iglesias et al. analyzed structure sensitivity of polycrystalline Pt , where they found that Pt (100) facet showed strong NH3 oxidation peak at 0.57 VRHE, while relatively small oxidation peaks were observed at potentials higher than 0.8 VRHE and lower than 0.6 VRHE for (110) and (111), respectively. To further improve the catalytic activity of Pt catalysts, Vitse et al. investigated bimetallic alloys of Pt-Ir and Pt-Ru, where they observed a reduction in overpotentials to achieve the current density of ~70 mA cm -2 for Pt-Ir (0.36 V) compared to Pt (0.56 V). Mishima et al. also examined Pt-Ir alloy using cyclic voltammetry and differential electrochemical spectroscopy (DEMS) , and they observed that Pt-Ir exclusively produced N2 and NO at low (0.40 ~ 0.80 VRHE) and high (above 0.80 VRHE) potentials, respectively. A systematic study was performed by De Vooys et al. Generally, GM mechanism was found to be kinetically more facile compared to NN mechanism.