In situ observations of an active MoS2 model hydrodesulfurization catalyst
| Autor: | Joost W. M. Frenken, Irene M. N. Groot, Rik V. Mom, Jaap N. Louwen |
|---|---|
| Přispěvatelé: | ARCNL (WZI, IoP, FNWI) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Materials science Hydrogen Science Chemical physics General Physics and Astronomy chemistry.chemical_element 02 engineering and technology General Biochemistry Genetics and Molecular Biology Article Catalysis law.invention 03 medical and health sciences Adsorption law lcsh:Science chemistry.chemical_classification Heterogeneous catalysis Multidisciplinary General Chemistry 021001 nanoscience & nanotechnology Sulfur Flue-gas desulfurization 030104 developmental biology Hydrocarbon chemistry Chemical engineering Physical chemistry lcsh:Q Scanning tunneling microscope 0210 nano-technology Hydrodesulfurization |
| Zdroj: | Nature Communications Nature Communications, Vol 10, Iss 1, Pp 1-8 (2019) Nature Communications, 10:2546. Nature Publishing Group Nature Communications, 10, 2546 |
| ISSN: | 2041-1723 |
| Popis: | The hydrodesulfurization process is one of the cornerstones of the chemical industry, removing harmful sulfur from oil to produce clean hydrocarbons. The reaction is catalyzed by the edges of MoS2 nanoislands and is operated in hydrogen-oil mixtures at 5–160 bar and 260–380 °C. Until now, it has remained unclear how these harsh conditions affect the structure of the catalyst. Using a special-purpose high-pressure scanning tunneling microscope, we provide direct observations of an active MoS2 model catalyst under reaction conditions. We show that the active edge sites adapt their sulfur, hydrogen, and hydrocarbon coverages depending on the gas environment. By comparing these observations to density functional theory calculations, we propose that the dominant edge structure during the desulfurization of CH3SH contains a mixture of adsorbed sulfur and CH3SH. Although hydrodesulfurization is a key process in the chemical industry, a deep understanding of the catalyst structure under real reaction conditions is lacking. Here, the authors combine theoretical calculations with high-pressure scanning tunneling microscopy to elucidate the MoS2 catalyst structure under reaction conditions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|