dc.contributor.author | Boukha, Zouhair | |
dc.contributor.author | González Velasco, Juan Ramón | |
dc.contributor.author | Gutiérrez Ortiz, Miguel Angel | |
dc.date.accessioned | 2022-11-02T17:34:17Z | |
dc.date.available | 2022-11-02T17:34:17Z | |
dc.date.issued | 2022-09-05 | |
dc.identifier.citation | Applied Catalysis B: Environmental 312 : (2022) // Article ID 121384 | es_ES |
dc.identifier.issn | 0926-3373 | |
dc.identifier.issn | 1873-3883 | |
dc.identifier.uri | http://hdl.handle.net/10810/58239 | |
dc.description.abstract | The viability of gold supported on lanthanum-modified HAP catalysts is investigated for CO preferential oxidation (PROX) in H-2-rich stream. All samples comprise small nanoparticles (NPs) of Au (< 4 nm). Addition of La enhances the chemisorption of CO, whereas it lowers that of H-2 and H2O. Moreover, lanthanum improves the reducibility of the catalysts and the mobility of oxygen. FTIR studies show that under CO oxidation conditions Au exists in two distinct forms on La-promoted samples, namely Au sigma+ and Au+ species. The catalytic tests under different PROX conditions show an improvement of the performance with lanthanum addition. The observed improvement is linked to suitable chemical properties, whereas efficiency dependence on Au NP sizes is rather secondary. At 80 degrees C, La-rich catalysts completely eliminate CO and prove to be selective (66%) under realistic PROX conditions (in the presence of H2O and CO2). Moreover, they are exceptionally stable during an extended period (240 h). | es_ES |
dc.description.sponsorship | The financial support from the Basque Government (IT1509-22) is acknowledged. The authors also acknowledge the technical support provided by SGIker (UPV/EHU Advanced Research Facilities/ERDF, EU). | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ | * |
dc.subject | gold catalyst | es_ES |
dc.subject | hydroxyapatite | es_ES |
dc.subject | lanthana | es_ES |
dc.subject | preferential oxidation of CO | es_ES |
dc.subject | realistic conditions | es_ES |
dc.title | Viability of Au/La2O3/HAP catalysts for the CO preferential oxidation reaction under reformate gas conditions | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.holder | © 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). | es_ES |
dc.rights.holder | Atribución-NoComercial-SinDerivadas 3.0 España | * |
dc.relation.publisherversion | https://www.sciencedirect.com/science/article/pii/S0926337322003253?via%3Dihub | es_ES |
dc.identifier.doi | 10.1016/j.apcatb.2022.121384 | |
dc.departamentoes | Ingeniería química | es_ES |
dc.departamentoeu | Ingeniaritza kimikoa | es_ES |