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Technical University of Crete
Technical University of Crete
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| URI | http://purl.tuc.gr/dl/dias/D178ED84-50B2-4896-B955-7EF1B3A27752 | - |
| Identifier | https://doi.org/10.3390/nano11112880 | - |
| Identifier | https://www.mdpi.com/2079-4991/11/11/2880/htm | - |
| Language | en | - |
| Extent | 24 pages | en |
| Title | Support induced effects on the Ir nanoparticles activity, selectivity and stability performance under CO2 reforming of methane | en |
| Creator | Nikolaraki Ersi | en |
| Creator | Νικολαρακη Ερση | el |
| Creator | Goula Grammatiki | en |
| Creator | Panagiotopoulou Paraskevi | en |
| Creator | Παναγιωτοπουλου Παρασκευη | el |
| Creator | Taylor Martin | en |
| Creator | Kousi Kalliopi | en |
| Creator | Kyriakou Georgios | en |
| Creator | Kondarides Dimitris I. | en |
| Creator | Lambert Richard M. | en |
| Creator | Gentekakis Ioannis | en |
| Creator | Γεντεκακης Ιωαννης | el |
| Publisher | MDPI | en |
| Content Summary | The production of syngas (H2 and CO)—a key building block for the manufacture of liquid energy carriers, ammonia and hydrogen—through the dry (CO2−) reforming of methane (DRM) continues to gain attention in heterogeneous catalysis, renewable energy technologies and sustainable economy. Here we report on the effects of the metal oxide support (γ-Al2O3, alumina-ceria-zirconia (ACZ) and ceria-zirconia (CZ)) on the low-temperature (ca. 500–750 ∘C) DRM activity, selectivity, resistance against carbon deposition and iridium nanoparticles sintering under oxidative thermal aging. A variety of characterization techniques were implemented to provide insight into the factors that determine iridium intrinsic DRM kinetics and stability, including metal-support interactions and physicochemical properties of materials. All Ir/γ-Al2O3, Ir/ACZ and Ir/CZ catalysts have stable DRM performance with time-on-stream, although supports with high oxygen storage capacity (ACZ and CZ) promoted CO2 conversion, yielding CO-enriched syngas. CZ-based supports endow Ir exceptional anti-sintering characteristics. The amount of carbon deposition was small in all catalysts, however decreasing as Ir/γ-Al2O3 > Ir/ACZ > Ir/CZ. The experimental findings are consistent with a bifunctional reaction mechanism involving participation of oxygen vacancies on the support’s surface in CO2 activation and carbon removal, and overall suggest that CZ-supported Ir nanoparticles are promising catalysts for low-temperature dry reforming of methane (LT-DRM). | en |
| Type of Item | Peer-Reviewed Journal Publication | en |
| Type of Item | Δημοσίευση σε Περιοδικό με Κριτές | el |
| License | http://creativecommons.org/licenses/by/4.0/ | en |
| Date of Item | 2022-09-22 | - |
| Date of Publication | 2021 | - |
| Subject | Greenhouse gases | en |
| Subject | Dry reforming of methane | en |
| Subject | Carbon dioxide | en |
| Subject | Alumina-ceria-zirconia mixed oxides | en |
| Subject | Iridium nanoparticles | en |
| Subject | Coking-resistant catalysts | en |
| Subject | Sintering-resistant catalysts | en |
| Subject | Syngas production | en |
| Bibliographic Citation | E. Nikolaraki, G. Goula, P. Panagiotopoulou, M. J. Taylor, K. Kousi, G. Kyriakou, D. I. Kondarides, R. M. Lambert, and I. V. Yentekakis, “Support induced effects on the Ir nanoparticles activity, selectivity and stability performance under CO2 reforming of methane,” Nanomaterials, vol. 11, no. 11, Oct. 2021, doi: 10.3390/nano11112880. | en |
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