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Carbon dioxide hydrogenation over supported Au nanoparticles: effect of the support

Vourros A., Garagounis Ioannis, Kyriakou Vasileios, Carabineiro, Sónia Alexandra Correia, Maldonado-Hódar, Francisco Jose, Marnellos, Geōrgios E, Konsolakis Michail

Απλή Εγγραφή


URIhttp://purl.tuc.gr/dl/dias/60EEBA1D-B7DB-4BDC-B18A-CDA3F3BF5146-
Αναγνωριστικόhttps://www.sciencedirect.com/science/article/pii/S2212982017300331?via%3Dihub-
Αναγνωριστικόhttps://doi.org/10.1016/j.jcou.2017.04.005-
Γλώσσαen-
Μέγεθος10 pagesen
ΤίτλοςCarbon dioxide hydrogenation over supported Au nanoparticles: effect of the supportel
ΔημιουργόςVourros A.en
ΔημιουργόςGaragounis Ioannisen
ΔημιουργόςKyriakou Vasileiosen
ΔημιουργόςCarabineiro, Sónia Alexandra Correiaen
ΔημιουργόςMaldonado-Hódar, Francisco Joseen
ΔημιουργόςMarnellos, Geōrgios Een
ΔημιουργόςKonsolakis Michailen
ΔημιουργόςΚονσολακης Μιχαηλel
ΕκδότηςElsevieren
ΠερίληψηThe present work aims to explore the impact of the support (MxOy: Al2O3, TiO2, Fe2O3, CeO2, ZnO) on the CO2 hydrogenation activity of supported gold nanoparticles (Au/MxOy) at atmospheric pressure. The textural, redox and surface properties of Au/MxOy catalysts were evaluated by various characterisation methods, namely N2 adsorption-desorption at -196 °C, temperature-programmed reduction in H2, high resolution transmission electron microscopy and X-ray photoelectron spectroscopy. The results revealed a strong influence of the support both on CO2 conversion and on products distribution. Gold nanoparticles supported on ZnO and CeO2 were highly selective towards methanol. TiO2- and Fe2O3-based samples demonstrated high CO2 conversion, leading, however, almost exclusively to CO and/or CH4. Au/Al2O3 was practically inactive in the investigated temperature range (200-350 °C). The following activity order, in terms of methanol formation rate, was obtained: Au/CeO2 > Au/ZnO > Au/Fe2O3 > Au/TiO2 > Au/Al2O3. Au/CeO2 exhibited a methanol formation rate of 4.1 × 10-6 mol s-1 gAu -1 at 250 °C, which is amongst the highest reported at ambient pressure, in spite of the chemical inertness of bare ceria. In view of the characterisation results, the superiority of the Au/CeO2 sample could be mainly ascribed to a synergistic effect linked to the Au-ceria interactions.en
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2018-05-14-
Ημερομηνία Δημοσίευσης2017-
Θεματική ΚατηγορίαAu nanoparticlesen
Θεματική ΚατηγορίαCO2 hydrogenationen
Θεματική ΚατηγορίαMetal-support interactionsen
Θεματική ΚατηγορίαMethanol synthesisen
Βιβλιογραφική ΑναφοράA. Vourros, I. Garagounis, V. Kyriakou, S.A.C. Carabineiro, F. J. Maldonado-Hódar, G. E. Marnellos and M. Konsolakis, "Carbon dioxide hydrogenation over supported Au nanoparticles: effect of the support," J. CO2 Util., vol. 19, pp. 247-256, May 2017. doi: 10.1016/j.jcou.2017.04.005en

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