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Article: Effect of oxygen mobility in the lattice of Au/TiO2 on formaldehyde oxidation

TitleEffect of oxygen mobility in the lattice of Au/TiO2 on formaldehyde oxidation
Authors
Issue Date2012
PublisherMAIK Nauka - Interperiodica. The Journal's web site is located at http://www.maik.rssi.ru/journals/kincat.htm
Citation
Kinetic and Catalysis, 2012, v. 53 n. 2, p. 239-246 How to Cite?
AbstractTwo Au catalysts supported on TiO 2 were prepared by impregnation method followed by sodium borohydride reduction or calcination in air (Au/TiO 2-R and Au/TiO 2-C, respectively). The 1 wt % Au/TiO 2-R sample was found to be highly efficient for the oxidation of low concentrated formaldehyde at room temperature. A HCHO conversion of 98.5% was achieved with this catalyst, whereas the Au/TiO 2-C sample showed almost no activity under the same conditions. Highly dispersed metallic Au nanoparticles with small size (∼3.5 nm) were identified in the 1 wt % Au/TiO 2-R catalyst. A significant negative shift of Au4f peak in XPS spectra with respect to bulk metallic Au was observed for the 1 wt % Au/TiO 2-R but no similar phenomena was found for the heat-treated catalyst. More Au nanoparticles and higher content of surface active oxygen were identified on the surface of the Au/TiO 2-R in comparison with the Au/TiO 2-C, suggesting that the Au/TiO 2-R catalyst can enhance the amount of active sites and species involved in for HCHO oxidation. The reduction treatment by sodium borohydride promotes the formation of dispersed metallic Au nanoparticles with small size because it facilitates the electron transfer and increases the content of surface Au nanoparticles and activated oxygen. All these factors are responsible for a high activity of this catalyst in the oxidation of HCHO. © Pleiades Publishing, Ltd., 2012.
Persistent Identifierhttp://hdl.handle.net/10722/149106
ISSN
2015 Impact Factor: 0.632
2015 SCImago Journal Rankings: 0.317
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLeung, DYCen_US
dc.contributor.authorFu, Xen_US
dc.contributor.authorYe, Den_US
dc.contributor.authorHuang, Hen_US
dc.date.accessioned2012-06-22T06:23:45Z-
dc.date.available2012-06-22T06:23:45Z-
dc.date.issued2012en_US
dc.identifier.citationKinetic and Catalysis, 2012, v. 53 n. 2, p. 239-246en_US
dc.identifier.issn0023-1584-
dc.identifier.urihttp://hdl.handle.net/10722/149106-
dc.description.abstractTwo Au catalysts supported on TiO 2 were prepared by impregnation method followed by sodium borohydride reduction or calcination in air (Au/TiO 2-R and Au/TiO 2-C, respectively). The 1 wt % Au/TiO 2-R sample was found to be highly efficient for the oxidation of low concentrated formaldehyde at room temperature. A HCHO conversion of 98.5% was achieved with this catalyst, whereas the Au/TiO 2-C sample showed almost no activity under the same conditions. Highly dispersed metallic Au nanoparticles with small size (∼3.5 nm) were identified in the 1 wt % Au/TiO 2-R catalyst. A significant negative shift of Au4f peak in XPS spectra with respect to bulk metallic Au was observed for the 1 wt % Au/TiO 2-R but no similar phenomena was found for the heat-treated catalyst. More Au nanoparticles and higher content of surface active oxygen were identified on the surface of the Au/TiO 2-R in comparison with the Au/TiO 2-C, suggesting that the Au/TiO 2-R catalyst can enhance the amount of active sites and species involved in for HCHO oxidation. The reduction treatment by sodium borohydride promotes the formation of dispersed metallic Au nanoparticles with small size because it facilitates the electron transfer and increases the content of surface Au nanoparticles and activated oxygen. All these factors are responsible for a high activity of this catalyst in the oxidation of HCHO. © Pleiades Publishing, Ltd., 2012.-
dc.languageengen_US
dc.publisherMAIK Nauka - Interperiodica. The Journal's web site is located at http://www.maik.rssi.ru/journals/kincat.htmen_US
dc.relation.ispartofKinetic and Catalysisen_US
dc.titleEffect of oxygen mobility in the lattice of Au/TiO2 on formaldehyde oxidationen_US
dc.typeArticleen_US
dc.identifier.emailLeung, DYC: ycleung@hku.hken_US
dc.identifier.emailFu, X: fuxili@hku.hken_US
dc.identifier.emailHuang, H: harbor@hku.hken_US
dc.identifier.authorityLeung, YC=rp00149en_US
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1134/S0023158412020048-
dc.identifier.scopuseid_2-s2.0-84861130286-
dc.identifier.hkuros200102en_US
dc.identifier.volume53en_US
dc.identifier.issue2-
dc.identifier.spage239en_US
dc.identifier.epage246en_US
dc.identifier.isiWOS:000302314300011-
dc.publisher.placeRussian Federation-
dc.identifier.citeulike10545952-

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