ESR ST study of hydroxyl radical generation in wet peroxide system catalyzed by heterogeneous ruthenium.
Ru-based catalysts gained popularity because of their applicability for a variety of processes, including carbon monoxide oxidation, wet air catalytic oxidation and wastewater treatment. The focus of a current study was generation of hydroxyl radicals in the wet peroxide system catalyzed by heterogeneous ruthenium, spin-trapped by DEPMPO and DIPPMPO by means of electron spin resonance spin-trapping technique (ESR ST). The mechanism of free radicals formation was proposed via direct cleavage of hydrogen peroxide over ruthenium active sites. The chemical reactions occurring in the system were introduced according to the experimental results. Also, radical production rate was assessed based on concentration changes of species involved in the bulk liquid phase oxidation.
Rokhina
Ekaterina V
EV
Department of Environmental Science, University of Kuopio, Finland. katja.rokhina@uku.fi
Golovina
Elena A
EA
As
Henk van
Hv
Virkutyte
Jurate
J
D000327:Adsorption; D002384:Catalysis; D004578:Electron Spin Resonance Spectroscopy; D017665:Hydroxyl Radical / Q000737:chemistry*; D007700:Kinetics; D010545:Peroxides / Q000737:chemistry*; D010758:Phosphorus / Q000737:chemistry; D012428:Ruthenium / Q000737:chemistry*
D010545:Peroxides; D010758:Phosphorus; D017665:Hydroxyl Radical; D012428:Ruthenium