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

Figure 2

Voltammograms recorded in 10% O₂ in Ar at 200 C with a sweep rate of 1 mV/s. The voltammograms show that the materials are active for both oxygen evolution and oxygen reduction. A marked difference in the activity is observed as a function of A-site cation. The most active compounds are the SmMnO_3+δ and GdMnO_3+δ perovskites.