USE OF MANGANESE OXIDES RECOVERED FROM SPENT BATTERIES IN ELECTROCATALYSIS OF OXYGEN REDUCTION REACTION IN ALKALINE MEDIUM.

USE OF MANGANESE OXIDES RECOVERED FROM SPENT BATTERIES IN ELECTROCATALYSIS OF OXYGEN REDUCTION REACTION IN ALKALINE MEDIUM. The oxygen reduction reaction was studied in alkaline media using manganese oxides obtained from spent batteries as electrocatalysts. Three processes were used to recover manganese oxides from spent batteries. The particles obtained were in the range from 8 to 11 nm. The electrochemical experiments indicated a good electrocatalytic activity toward oxygen reduction using the different samples and showing approximately a direct transference of 4 electrons during the process. Even though all the processes were efficient, the best result was observed for the prepared sample using reactants of low cost.