High-entropy oxides are an upcoming research topic due to their broad range of possible crystal structures and applications. In this work, we want present the change in catalytic properties when using different elements create a high-entropy spinel. Therefore, used nebulized-spray pyrolysis synthesize spinel (Mn 0.2 Fe Ni Mg Zn ) 3 O 4 later on exchanged or with multiple oxidation states, our e...