Transformations of manganese oxides under different thermal conditions |
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| Authors: | C González J I Gutiérrez J R González-Velasco A Cid A Arranz J F Arranz |
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| Institution: | 1. Chemical Engineering Department, Sciences Faculty, Basque Country University, 48080, Bilbao
2. Analytical Chemistry Department, Pharmacy Faculty, Basque Country University, 01007, Vitoria, Spain
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| Abstract: | Thermal decomposition of various synthetic manganese oxides (MnO, Mn3O4, Mn2O3, MnOOH) and a natural manganese dioxide (MnO2) from Gabon was studied with the help of termogravimetry in inert, oxidizing and reducing atmospheres. The compounds were characterized by XRD and electrochemical activity was tested by cyclic voltammetry using a carbon paste electrode. The natural manganese dioxide showed the best oxidizing and reducing capacity, confirmed by the lower temperatures of the transitions, the extent of the reactions and electrochemical performance in cyclic voltammograms. |
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