Case Study on the Reproducibility of Characterizing the Electrocatalytic Activity of La1−xSrxMnO3 in ORR

The electrocatalytic activity characterization of the oxygen reduction reaction (ORR) is commonly characterized using a rotating disk electrode (RDE) with linear sweep voltammetry (LSV) or cyclic (CV) measurements. Despite wide application this method in literature, its reproducibility and comparability are rarely mentioned articles. LSV CV sensitive to experimental conditions, thus significant concern. In article, perovskite oxides La1−xSrxMnO3 (LSMOx, x = 0, 0.1, 0.2, 0.3, 0.4, 0.5) chosen for case study measure their electroactivity RDE method. main elements that influence experiment presented corresponding explanations as well means ensuring given. Through LSMOx variations calcination temperatures, values kinetic current ORR on different catalysts compared. It found doping ratios above 0.1 associated higher electroactivity, around 50 mV difference onset potential between > which accordance results reported works, whereas there no when 0.2–0.5. Calcination temperature has little LSMOx, resulting only slight advantage at lower an 10 more positive.