Engineering of Ruthenium–Iron Oxide Colloidal Heterostructures: Improved Yields in CO 2 Hydrogenation to Hydrocarbons
| Autor: | Liheng Wu, Huikai Cheng, Arda Genc, Simon R. Bare, Aisulu Aitbekova, Adam S. Hoffman, Lee Casalena, Alexey Boubnov, Emmett D. Goodman, Matteo Cargnello |
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| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Materials science 010405 organic chemistry Iron oxide Oxide chemistry.chemical_element General Chemistry 010402 general chemistry 01 natural sciences Catalysis Water-gas shift reaction 0104 chemical sciences Ruthenium chemistry.chemical_compound Hydrocarbon chemistry Chemical engineering Reactivity (chemistry) Hydrogen spillover |
| Zdroj: | Angewandte Chemie International Edition. 58:17451-17457 |
| ISSN: | 1521-3773 1433-7851 |
| DOI: | 10.1002/anie.201910579 |
| Popis: | Catalytic CO2 reduction to fuels and chemicals is a major pursuit in reducing greenhouse gas emissions. One approach utilizes the reverse water-gas shift reaction, followed by Fischer-Tropsch synthesis, and iron is a well-known candidate for this process. Some attempts have been made to modify and improve its reactivity, but resulted in limited success. Now, using ruthenium-iron oxide colloidal heterodimers, close contact between the two phases promotes the reduction of iron oxide via a proximal hydrogen spillover effect, leading to the formation of ruthenium-iron core-shell structures active for the reaction at significantly lower temperatures than in bare iron catalysts. Furthermore, by engineering the iron oxide shell thickness, a fourfold increase in hydrocarbon yield is achieved compared to the heterodimers. This work shows how rational design of colloidal heterostructures can result in materials with significantly improved catalytic performance in CO2 conversion processes. |
| Databáze: | OpenAIRE |
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