Figure 3.

Non-ferrous Fenton ions and their reaction with hydrogen peroxide. (a) A schematic is shown that highlights non-Ferrous Fenton ions with the oxidation states that catalyze the substrates [47]. Polyoxometalates (POMs) are metal oxyanion clusters; (b) This schematic depicts an overview of the redox reactions between H₂O₂ and various non-ferrous Fenton catalysts. The species highlighted in red or blue indicate the active Fenton catalyst and the product, respectively. Reprinted with permission from ref. [47]. Copyright 2014 Elsevier.