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- W2022755733 abstract "The interaction between gaseous oxygen and a catalyst Pt−Rh supported on γ-Al2O3 (specific surface area: 100 m2 g-1) was investigated by means of a differential desorption technique called intermittent temperature-programmed desorption (ITPD). Experiments were carried out under conventional secondary vacuum (P ≈ 10-4 Pa). Essentially, three desorption steps α, β1, and β2 were observed, occurring around 350, 650, and 750 K, respectively. Steps β1 and β2 stem from the desorption of oxygen strongly and dissociatively adsorbed on the metallic particles. Desorption step α is better observed after oxygen adsorption at ambient temperature; it corresponds to weakly bonded oxygen. The high values of the frequency factors strongly suggest that no readsorption occurred when oxygen desorbed through steps β1 and β2. Desorption activation energies for steps β1 and β2 were estimated at 219 and 305 kJ/mol, respectively." @default.
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- W2022755733 date "2003-09-26" @default.
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- W2022755733 title "Investigation of Oxygen Interaction with a Pt−Rh/Al<sub>2</sub>O<sub>3</sub> Catalyst by a Differential Temperature-Programmed Desorption Method" @default.
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- W2022755733 doi "https://doi.org/10.1021/la0344635" @default.
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