“…We may thereby conclude that after an hour of electrolysis, electrocatalytic properties of MnO 2 anodic layers have diminished and tend to be equal in both scan directions. On comparing the charges obtained, the ACZn12Mn system exhibits higher values for O2 process, which may be related to simultaneous reactions occurring in this system, already described by several authors (Chen and Dutrizac, 2011;Liu et al, 2011;Masatsugu, 2011;Recéndiz et al, 2008Recéndiz et al, , 2009Recéndiz et al, , 2010Schmachtel et al, 2008;Tjandrawan and Nicol, 2013;Zhang and Hua, 2009). Fig.…”