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Article Dans Une Revue RSC Advances Année : 2019

Catalytic decomposition of N 2 O over Cu–Al–O x mixed metal oxides

Résumé

Cu-Al-O x mixed metal oxides with intended molar ratios of Cu/Al ¼ 85/15, 78/22, 75/25, 60/30, were prepared by thermal decomposition of precursors at 600 C and tested for the decomposition of nitrous oxide (deN 2 O). Techniques such as XRD, ICP-MS, N 2 physisorption, O 2-TPD, H 2-TPR, in situ FT-IR and XAFS were used to characterize the obtained materials. Physico-chemical characterization revealed the formation of mixed metal oxides characterized by different specific surface area and thus, different surface oxygen default sites. The O 2-TPD results gained for Cu-Al-O x mixed metal oxides conform closely to the catalytic reaction data. In situ FT-IR studies allowed detecting the form of Cu + /N 2 complexes due to the adsorption of nitrogen, i.e. the product in the reaction between N 2 O and copper lattice oxygen. On the other hand, mostly nitrate species and NO were detected but those species were attributed to the residue from catalyst synthesis.

Domaines

Catalyse
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Dates et versions

hal-01999315 , version 1 (06-07-2020)

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Paternité - Pas d'utilisation commerciale

Identifiants

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Magdalena Jabłońska, Miren Agote Arán, Andrew M. Beale, Kinga Góra-Marek, Gerard Delahay, et al.. Catalytic decomposition of N 2 O over Cu–Al–O x mixed metal oxides. RSC Advances, 2019, 9 (7), pp.3979-3986. ⟨10.1039/c8ra10509j⟩. ⟨hal-01999315⟩
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