Applications of the “nano to bulk” Mn oxides: Mn oxide as a Swiss army knife

•Mn oxides are inexpensive, environmental friendly, stable and redox active compounds.•The structures of Mn oxides are discussed.•Applications of Mn oxides are reviewed.•Mn oxides are promising compounds to be used for industrial applications.

Mn oxides are inexpensive, environmentally friendly, stable and redox-active compounds. Thus, they are among the most promising compounds for different applications. In this short review we discuss the importance of Mn oxides in different catalytic reactions, such as alcohol, sulfide and water oxidations, and also promising applications of these compounds as supercapacitors, in batteries and water treatment.

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