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Instruments / Technical Area	Publication Details	Published	Actions
B18-Core EXAFS	Catalytic decomposition of N2O over Cu–Al–Ox mixed metal oxides Magdalena Jablonska , Miren Agote Arán , Andrew M. Beale , Kinga Góra-Marek , Gérard Delahay , Carolina Petitto , Kateřina Pacultová , Regina Palkovits Rsc Advances 9, 3979 - 3986 DOI: 10.1039/C8RA10509J Diamond Proposal Number(s): [14834] Open Access Show Abstract ▼ 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.	Jan 2019
I18-Microfocus Spectroscopy	Real-time multi-length scale chemical tomography of fixed bed reactors during the oxidative coupling of methane reaction Antonios Vamvakeros , Dorota Matras , Simon D. M. Jacques , Marco Di Michiel , Stephen W. T. Price , Pierre Senecal , Miren Agote Aran , Vesna Middelkoop , Gavin B. G. Stenning , J. Frederick W. Mosselmans , Ilyas Z. Ismagilov , Andrew M. Beale Journal Of Catalysis 386, 39 - 52 DOI: 10.1016/j.jcat.2020.03.027 Diamond Proposal Number(s): [14525] Show Abstract ▼ Abstract: In this work, we present the results from multi-length-scale studies of a Mn-Na-W/SiO2 and a La-promoted Mn-Na-W/SiO2 catalyst during the oxidative coupling of methane reaction. The catalysts were investigated from the reactor level (mm scale) down to the single catalyst particle level (μm scale) with different synchrotron X-ray chemical computed tomography techniques (multi-modal chemical CT experiments). These operando spatially-resolved studies performed with XRD-CT (catalytic reactor) and multi-modal μ-XRF/XRD/absorption CT (single catalyst particle) revealed the multiple roles of the La promoter and how it provides the enhancement in catalyst performance. It is also shown that non-crystalline Mn species are part of the active catalyst component rather than crystalline Mn2O3/Mn7SiO12 or MnWO4.	Jun 2020

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