Abstract
Transition metal chalcogenide material based on W-Se-Os(CO) n cluster electrocatalyst were prepared by reacting the transition metal carbonyl compounds OS 3 (CO) 12 and W(CO) 6 , with elemental selenium in 1,2-dichloro- benzene (bp≈180°C). The synthesized material was characterized by FT-IR, 13 C MAS NMR spectroscopy, X-ray diffraction (XRD), SEM and electrochemically. XRD indicated that the powder presents crystalline structure sup- ported on an amorphous surface. The electrocatalytic activity for molecular oxygen reduction was studied by a Rotating Ring-Disc Electrode ( rrde) technique in a 0.5 MH 2 SO 4 . The results showed that the oxygen reduction occurs via multielectron charge transfer (n = 4e - ), to water formation. The yield to water formation is more than 96%.
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