Academic Journal
Nanoscale chemical diversity of coke deposits on nanoprinted metal catalysts visualized by tip‐enhanced Raman spectroscopy
| العنوان: | Nanoscale chemical diversity of coke deposits on nanoprinted metal catalysts visualized by tip‐enhanced Raman spectroscopy |
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| المؤلفون: | Filez, Matthias, Walke, Peter, Le‐The, Hai, Toyouchi, Shuichi, Peeters, Wannes, Tomkins, Patrick, Eijkel, Jan C. T., De Feyter, Steven, Detavernier, Christophe, De Vos, Dirk E., Uji‐I, Hiroshi, Roeffaers, Maarten B. J. |
| المصدر: | ADVANCED MATERIALS ; ISSN: 0935-9648 ; ISSN: 1521-4095 |
| سنة النشر: | 2024 |
| المجموعة: | Ghent University Academic Bibliography |
| مصطلحات موضوعية: | Chemistry, Physics and Astronomy, Mechanical Engineering, Mechanics of Materials, General Materials Science, coke formation, nanoparticle catalysts, propane dehydrogenation, reactivation, tailored catalyst fabrication, tip-enhanced Raman spectroscopy, DEHYDROGENATION, DEACTIVATION, TIME, SCATTERING, CONVERSION, GRAPHENE, SURFACE, CARBON |
| الوصف: | Coke formation is the prime cause of catalyst deactivation, where undesired carbon wastes block the catalyst surface and hinder further reaction in a broad gamut of industrial chemical processes. Yet, the origins of coke formation and their distribution across the catalyst remain elusive, obstructing the design of coke-resistant catalysts. Here, the first-time application of tip-enhanced Raman spectroscopy (TERS) is demonstrated as a nanoscale chemical probe to localize and identify coke deposits on a post-mortem metal nanocatalyst. Monitoring coke at the nanoscale circumvents bulk averaging and reveals the local nature of coke with unmatched detail. The nature of coke is chemically diverse and ranges from nanocrystalline graphite to disordered and polymeric coke, even on a single nanoscale location of a top-down nanoprinted SiO2-supported Pt catalyst. Surprisingly, not all Pt is an equal producer of coke, where clear isolated coke "hotspots" are present non-homogeneously on Pt which generate large amounts of disordered coke. After their formation, coke shifts to the support and undergoes long-range transport on the surrounding SiO2 surface, where it becomes more graphitic. The presented results provide novel guidelines to selectively free-up the coked metal surface at more mild rejuvenation conditions, thus securing the long-term catalyst stability. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/vnd.openxmlformats-officedocument.wordprocessingml.document |
| اللغة: | English |
| Relation: | https://biblio.ugent.be/publication/01HR9HHS81QC1S80XVYRV801EG; http://doi.org/10.1002/adma.202305984; https://biblio.ugent.be/publication/01HR9HHS81QC1S80XVYRV801EG/file/01HR9HZJ1XC8J1CJN9KR6QT40Q |
| DOI: | 10.1002/adma.202305984 |
| الاتاحة: | https://biblio.ugent.be/publication/01HR9HHS81QC1S80XVYRV801EG http://hdl.handle.net/1854/LU-01HR9HHS81QC1S80XVYRV801EG https://doi.org/10.1002/adma.202305984 https://biblio.ugent.be/publication/01HR9HHS81QC1S80XVYRV801EG/file/01HR9HZJ1XC8J1CJN9KR6QT40Q |
| Rights: | No license (in copyright) ; info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.33BE3E71 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1002/adma.202305984 |
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