Academic Journal
Multi-length scale 5D diffraction imaging of Ni-Pd/CeO2-ZrO2/Al2O3 catalyst during partial oxidation of methane
| العنوان: | Multi-length scale 5D diffraction imaging of Ni-Pd/CeO2-ZrO2/Al2O3 catalyst during partial oxidation of methane |
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| المؤلفون: | Matras, Dorota, Vamvakeros, Antonis, Jacques, Simon D. M., Di Michiel, Marco, Middelkoop, Vesna, Ismagilov, Ilyas Z., Matus, Ekaterina V., Kuznetsov, Vadim V., Cernik, Robert J., Beale, Andrew M. |
| المساهمون: | School of Materials Manchester, University of Manchester Manchester, European Synchrotron Radiation Facility Grenoble (ESRF), Finden Limited, Flemish Institute for Technological Research (VITO), Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences (SB RAS), University College of London London (UCL) |
| المصدر: | ISSN: 2050-7488 ; Journal of Materials Chemistry A ; https://hal.science/hal-03722614 ; Journal of Materials Chemistry A, 2021, 9 (18), pp.11331-11346. ⟨10.1039/d1ta01464a⟩. |
| بيانات النشر: | HAL CCSD Royal Society of Chemistry |
| سنة النشر: | 2021 |
| المجموعة: | Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
| مصطلحات موضوعية: | NI-BASED CATALYSTS, FISCHER-TROPSCH SYNTHESIS, SYNTHESIS GAS, COKE FORMATION, COMPUTED-TOMOGRAPHY, HYDROGEN-PRODUCTION, SYNGAS PRODUCTION, PHYSICOCHEMICAL PROPERTIES, NI/CEO2-AL2O3 CATALYSTS, SUPPORT COMPOSITION, [CHIM]Chemical Sciences |
| الوصف: | International audience ; A 5D diffraction imaging experiment (with 3D spatial, 1D time/imposed operating conditions and 1D scattering signal) was performed with a Ni-Pd/CeO2-ZrO2/Al2O3 catalyst. The catalyst was investigated during both activation and partial oxidation of methane (POX). The spatio-temporal resolved diffraction data allowed us to obtain unprecedented insight into the behaviour and fate of the various metal and metal oxide species and how this is affected by the heterogeneity across catalyst particles. We show firstly, how Pd promotion although facilitating Ni reduction, over time leads to formation of unstable Ni-Pd metallic alloy, rendering the impact of Pd beyond the initial reduction less important. Furthermore, in the core of the particles, where the metallic Ni is primarily supported on Al2O3, poor resistance towards coke deposition was observed. We identified that this preceded via the formation of an active yet metastable interstitial solid solution of Ni-C and led to the exclusive formation of graphitic carbon, the only polymorph of coke observed. In contrast, at the outermost part of the catalyst particle, where Ni is predominantly supported on CeO2-ZrO2, the graphite formation was mitigated but sintering of Ni crystallites was more severe. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | hal-03722614; https://hal.science/hal-03722614; https://hal.science/hal-03722614/document; https://hal.science/hal-03722614/file/J_Mater_Chem_A_9_11331.pdf; WOS: 000644940300001 |
| DOI: | 10.1039/d1ta01464a |
| الاتاحة: | https://hal.science/hal-03722614 https://hal.science/hal-03722614/document https://hal.science/hal-03722614/file/J_Mater_Chem_A_9_11331.pdf https://doi.org/10.1039/d1ta01464a |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.F4C6BC36 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1039/d1ta01464a |
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