Electrochemical Reduction of Oxygen and Nitric Oxide on Mn-Based Perovskites with Different A-Site Cations

Figure 4

The voltammograms recorded on the four manganite-based perovskite with different A-site cations in an atmosphere with 10% O₂ in Ar at 400 C with a sweep rate of 1 mV/s. At this temperature, only little difference is observed in the cathodic region. However, in the anodic region, where oxygen is evolved, the PrMnO_3+δ perovskite has a much higher activity than the other three perovskites.