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Catalytic decomposition of N2O over Cu–Al–Ox mixed metal oxides

DOI: 10.1039/C8RA10509J DOI Help

Authors: Magdalena Jablonska (RWTH Aachen University) , Miren Agote Arán (University College London) , Andrew M. Beale (University College London; UK Catalysis Hub, Research Complex at Harwell) , Kinga Góra-Marek (Jagiellonian University in Kraków) , Gérard Delahay (Institut Charles Gerhardt de Montpellier) , Carolina Petitto (Institut Charles Gerhardt de Montpellier) , Kateřina Pacultová (VŠB-Technical University of Ostrava) , Regina Palkovits (RWTH Aachen University)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Rsc Advances , VOL 9 , PAGES 3979 - 3986

State: Published (Approved)
Published: January 2019
Diamond Proposal Number(s): 14834

Open Access Open Access

Abstract: Cu–Al–Ox mixed metal oxides with intended molar ratios of Cu/Al = 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 (deN2O). Techniques such as XRD, ICP-MS, N2 physisorption, O2-TPD, H2-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 O2-TPD results gained for Cu–Al–Ox mixed metal oxides conform closely to the catalytic reaction data. In situ FT-IR studies allowed detecting the form of Cu+⋯N2 complexes due to the adsorption of nitrogen, i.e. the product in the reaction between N2O 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.

Subject Areas: Chemistry

Instruments: B18-Core EXAFS

Added On: 04/02/2019 11:53


Discipline Tags:

Catalysis Physical Chemistry Chemistry

Technical Tags:

Spectroscopy X-ray Absorption Spectroscopy (XAS)