dc.creator | Park, Joon B. | es |
dc.creator | Graciani Alonso, Jesús | es |
dc.creator | Evans, Jaime | es |
dc.creator | Stacchiola, Dario | es |
dc.creator | Ma, Shuguo | es |
dc.creator | Liu, Ping | es |
dc.creator | Nambu, Akira | es |
dc.creator | Fernández Sanz, Javier | es |
dc.creator | Hrbek, Jan | es |
dc.creator | Rodríguez, José A. | es |
dc.date.accessioned | 2018-01-24T17:14:36Z | |
dc.date.available | 2018-01-24T17:14:36Z | |
dc.date.issued | 2009 | |
dc.identifier.citation | Park, J.B., Graciani Alonso, J., Evans, J., Stacchiola, D., Ma, S., Liu, P.,...,Rodríguez, J.A. (2009). High catalytic activity of Au/CeO x/TiO 2(110) controlled by the nature of the mixed-metal oxide at the nanometer level. Proceedings of the National Academy of Sciences of the United States of America, 106 (13), 4975-4980. | |
dc.identifier.issn | 0027-8424 | es |
dc.identifier.uri | https://hdl.handle.net/11441/69495 | |
dc.description.abstract | Mixed-metal oxides play a very important role in many areas of chemistry, physics, materials science, and geochemistry. Recently, there has been a strong interest in understanding phenomena associated with the deposition of oxide nanoparticles on the surface of a second (host) oxide. Here, scanning tunneling microscopy, photoemission, and density-functional calculations are used to study the behavior of ceria nanoparticles deposited on a TiO2(110) surface. The titania substrate imposes nontypical coordination modes on the ceria nanoparticles. In the CeO x/TiO 2(110) systems, the Ce cations adopt an structural geometry and an oxidation state (+3) that are quite different from those seen in bulk ceria or for ceria nanoparticles deposited on metal substrates. The increase in the stability of the Ce 3+ oxidation state leads to an enhancement in the chemical and catalytic activity of the ceria nanoparticles. The codeposition of ceria and gold nanoparticles on a TiO 2(110) substrate generates catalysts with an extremely high activity for the production of hydrogen through the water-gas shift reaction (H 2O + CO → H 2 + CO 2) or for the oxidation of carbon monoxide (2C0 + O 2→2CO 2). The enhanced stability of the Ce 3+ state is an example of structural promotion in catalysis described here on the atomic level. The exploration of mixed-metal oxides at the nanometer level may open avenues for optimizing catalysts through stabilization of unconventional surface structures with special chemical activity. | es |
dc.description.sponsorship | Ministerio de Ciencia e Innovación MAT2008-04918 | es |
dc.format | application/pdf | es |
dc.language.iso | eng | es |
dc.publisher | National Academy of Sciences | es |
dc.relation.ispartof | Proceedings of the National Academy of Sciences of the United States of America, 106 (13), 4975-4980. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | nanoparticle | es |
dc.subject | titanium dioxide | es |
dc.subject | cerium oxide | es |
dc.title | High catalytic activity of Au/CeO x/TiO 2(110) controlled by the nature of the mixed-metal oxide at the nanometer level | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Química Física | es |
dc.relation.publisherversion | http://dx.doi.org/10.1073/pnas.0812604106 | es |
dc.identifier.doi | 10.1073/pnas.0812604106 | es |
idus.format.extent | 6 | es |
dc.journaltitle | Proceedings of the National Academy of Sciences of the United States of America | es |
dc.publication.volumen | 106 | es |
dc.publication.issue | 13 | es |
dc.publication.initialPage | 4975 | es |
dc.publication.endPage | 4980 | es |
dc.contributor.funder | Ministerio de Ciencia e Innovación (MICIN). España | |