Abstract: Described herein are heterogeneous catalysts for removing impurities, such as halogen oxyanions (e.g., ClO4? and ClO3?), from a fluid, the catalyst can comprise: an oxygen atom transfer (OAT) transition metal, a Group VIII metal, and a support, where the transition metal, and the Group VIII metal can be in physical communication with the support either directly or indirectly through each other, whereby the catalyst can chemically remove impurities from the fluid. Certain embodiments provide catalysts that further comprise nitrogen donor ligand(s). Accordingly, such catalysts that comprise the OAT transition metal in the form of a complex with one or more nitrogen donor ligands have enhanced efficiency in reducing halogen oxyanion (e.g., ClO4?) to Cl?. Also described are methods or kits for making the catalysts and methods or reactor for the treatment of a fluid utilizing the catalyst.

Abstract: Described herein are heterogeneous catalysts for removing impurities, such as halogen oxyanions (e.g., ClO4? and ClO3?), from a fluid, the catalyst can comprise: an oxygen atom transfer (OAT) transition metal, a Group VIII metal, and a support, where the transition metal, and the Group VIII metal can be in physical communication with the support either directly or indirectly through each other, whereby the catalyst can chemically remove impurities from the fluid. Certain embodiments provide catalysts that further comprise nitrogen donor ligand(s). Accordingly, such catalysts that comprise the OAT transition metal in the form of a complex with one or more nitrogen donor ligands have enhanced efficiency in reducing halogen oxyanion (e.g., ClO4?) to Cl?. Also described are methods or kits for making the catalysts and methods or reactor for the treatment of a fluid utilizing the catalyst.