We can observe from the Figure , in the constant potential electrolysis, only NH4 + related peak present. In contrast with the constant potential, when applying pulsed electrolysis, peaks in the range of 3000-3600 cm -1 emerged, we ascribe them as the NH2*. That being said, the steady state of partial NH3 oxidation related species remain on the catalysts surface with select a range of pulsed electrolysis conditions.