2026-06-02T05:43:01Z https://icatplus.esrf.fr/oaipmh/request

oai:icatplus.esrf.fr:inv/2093747727 2025-05-03T06:00:29.561Z

4.2 EI 10.15151/ESRF-ES-2093747727 Alessandra BERETTA Alessandra Beretta 0000-0003-4854-4907 Alessandra BERETTA Alessandra Beretta 0000-0003-4854-4907 Kirill LOMACHENKO Kirill Lomachenko 0000-0003-0238-1719 Chiara NEGRI Chiara Negri 0000-0002-5216-2517 Chiara NEGRI Chiara Negri 0000-0002-5216-2517 Lidia CASTOLDI Lidia Castoldi 0000-0002-7962-1146 Lidia CASTOLDI Lidia Castoldi 0000-0002-7962-1146 Veronica PIAZZA Veronica Piazza 0000-0002-8470-1773 Marco ORSENIGO Marco Orsenigo Marco ORSENIGO Marco Orsenigo Veronica PIAZZA Veronica Piazza 0000-0002-8470-1773 Example Institute 2028 Data from large facility measurement 2025-04-29T06:00:00Z/2025-05-03T06:00:00Z 2025-05-03T06:00:00Z I CC-BY-4.0 Fe-based catalysts are active catalysts for the catalytic decomposition of methane, key-reaction for the energy transition, which leads to pure H2 and solid C. Despite the interest, a full comprehension of the structure-activity relationship for Fe-based catalysts is still under way. In our group we focused on experimental and modelling activity on CH4 pyrolysis over Fe/Al2O3 catalysts. To rationalize the results in terms of Fe active site/phase, with this proposal we aim at systematically investigate catalyst modifications during activation and pyrolysis reaction by operando powder X-ray diffraction combined with operando XAS on a series of samples, varying the Fe loading (12 - 100 wt% Fe, with Al2O3 as textural promoter). We will focus on high-quality PXRD and XAS data collection in reaction conditions, to determine the metal active phase structure and the role played by metastable and intermediate phases, as well as the changes in Fe oxidation state and average coordination numbers.