Functional materials S. Mauri1, R. Calligaro2, C.F. Pauletti3, M.F. Camellone1, M. Boaro2, L. Braglia1,4, S. Fabris1, S. Piccinin1, P. Torelli1, A. Trovarelli2 1 CNR-IOM, Laboratorio TASC, Trieste, Italy 2 Università degli Studi di Udine, Dipartimento Politecnico, via del Cotonificio 108, 33100 Udine, and INSTM- University of Udine Research Unity, Udine, Italy 3 Università degli Studi di Trieste, Dipartimento di Fisica, via Alfonso Valerio 2, 34127 Trieste, Italy 4 AREA Science Park, Padriciano 99, I-34149 Trieste, Italy e-mail: mauri@iom.cnr.it; alessandro.trovarelli@uniud.it Acknowledgments This work was performed in the framework of the Nanoscience Foundry and Fine Analysis (NFFA-M UR Italy Progetti lnternazionali) facility (https:// www.trieste.nffa.eu/). L.B. acknowledges the (PNR) grant (J95F2100283000l) with the title "FAIR-by-Design". Original paper S. Mauri et al., Small 20, 2403028 (2024); DOI: 10.1002/smll.202403028. Figure 2. In-situ DRIFTS data acquired during two subsequent catalytic cycles. Step 1: He+CH4, Step 2: He, Step 3: He+O2. m = methoxy group; f = formate group. Figure 3. Operando NEXAFS data acquired during two subsequent catalytic cycles. Step 1: He+CH4, Step 2: He, Step 3: He+O2. Figure 1. Graphical representation of the CuO/CeO2 interface in the ball milled composites. Ce → Cu charge transfer occurring during the ball milling process takes to the formation of reactive O atoms able to activate the methane molecule. Fig. 3 Fig. 1 Fig. 2 Elettra Highlights 2024–2025 11
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