High Catalytic Activity of Pt/Al2O3 Catalyst in CO Oxidation at Room Temperature—A New Insight into Strong Metal–Support Interactions
| Autor: | Jacek Rynkowski, Jacek Rogowski, Marcin Jędrzejczyk, Izabela Śmiechowicz, Ireneusz Kocemba |
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| Rok vydání: | 2021 |
| Předmět: |
CO oxidation
Pt/Al2O3 catalyst SMSI phenomenon Chemical technology Inorganic chemistry chemistry.chemical_element Context (language use) TP1-1185 Chemical reaction Redox Catalysis Metal Chemistry chemistry Chemisorption visual_art visual_art.visual_art_medium Titration Physical and Theoretical Chemistry Platinum QD1-999 |
| Zdroj: | Catalysts; Volume 11; Issue 12; Pages: 1475 Catalysts, Vol 11, Iss 1475, p 1475 (2021) |
| ISSN: | 2073-4344 |
| Popis: | The concept of very strong metal–support interactions (VSMSI) was defined in regard to the interactions that influence the catalytic properties of catalysts due to the creation of a new phase as a result of a solid-state chemical reaction between the metal and support. In this context, the high catalytic activity of the 1%Pt/Al2O3 catalyst in the CO oxidation reaction at room temperature was explained. The catalyst samples were reduced at different temperatures ranging from 500 °C to 800 °C and characterized using TPR, O2/H2 titration, CO chemisorption, TPD-CO, FTIR-CO, XRD, and TOF-SIMS methods. Based on the obtained results, it was claimed that with very high temperature reduction (800 °C), nonstoichiometric platinum species [Pt(Cl)Ox] strongly anchored to Al2O3 surface are formed. These species act as the oxygen adsorption sites. |
| Databáze: | OpenAIRE |
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