“…The main findings are the dramatically reduced temperature in comparison with previously reported ODH catalyst for propane and cyclohexane and the suppression of CO 2 production for the lean conditions. The temperature of 100 °C, at which the ODH activity sets off, is lower than reported for propane ODH with Pt clusters (~400 °C) 8 or in the ODH of cyclohexane by various catalysts, such as VOx (~400 °C) 25 , zeolites doped with transition metals (>300 °C) 26 , copper oxide-based (~250 °C) 27 , Au/Pd-based (200 °C) 23 , or FeO x , Au/Fe 3 O 4 and Co 3 O 4 -based catalysts (~200–250 °C) 28,29 . In comparison with per exposed surface Co atom rates obtained for 6 nm Co 3 O 4 particles 29 tested under identical reaction conditions, the rate of formation of cyclohexene, cyclohexadiene, and benzene measured on the Co 4 and Co 27 clusters are higher by about a factor of 20, 100, and 1.2, respectively.…”