Enhanced Bonding of Gold Nanoparticles on Oxidized TiO 2 (110)

D. Matthey; J. G. Wang; Stefan Wendt; J. Matthiesen; Renald Schaub; Erik Lægsgaard; Bjørk Hammer; Flemming Besenbacher

doi:10.1126/science.1135752

Abstract

We studied the nucleation of gold clusters on TiO 2 (110) surfaces in three different oxidation states by high-resolution scanning tunneling microscopy. The three TiO 2 (110) supports chosen were (i) reduced (having bridging oxygen vacancies), (ii) hydrated (having bridging hydroxyl groups), and (iii) oxidized (having oxygen adatoms). At room temperature, gold nanoclusters nucleate homogeneously on the terraces of the reduced and oxidized supports, whereas on the hydrated TiO 2 (110) surface, clusters form preferentially at the step edges. From interplay with density functional theory calculations, we identified two different gold-TiO 2 (110) adhesion mechanisms for the reduced and oxidized supports. The adhesion of gold clusters is strongest on the oxidized support, and the implications of this finding for catalytic applications are discussed.

Keywords

NanoclustersScanning tunneling microscopeNucleationColloidal goldMaterials scienceDensity functional theoryOxygenChemical physicsNanoparticleNanotechnologyGold clusterCrystallographyCatalysisChemical engineeringChemistryPhotochemistryComputational chemistryOrganic chemistry

Affiliated Institutions

Aarhus University DK

Related Publications

Oxygen Vacancies as Active Sites for Water Dissociation on Rutile<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>TiO</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mo>(</mml:mo><mml:mn>110</mml:mn><mml:mo>)</mml:mo></mml:math>

Renald Schaub , Peter Thostrup , Núria López +4 more

Through an interplay between scanning tunneling microscopy experiments and density functional theory calculations, we determine unambiguously the active surface site responsible...

2001 Physical Review Letters 965 citations

CO Oxidation on Aun/TiO2 Catalysts Produced by Size-Selected Cluster Deposition

Sungsik Lee , Chaoyang Fan , Tianpin Wu +1 more

Planar model catalysts were prepared by deposition of size-selected gold clusters containing up to seven atoms on rutile TiO2 (110). Molecular oxygen is observed to bind ineffic...

2004 Journal of the American Chemical Society 342 citations

Nanoclusters of Gold on a High-Area Support: Almost Uniform Nanoclusters Imaged by Scanning Transmission Electron Microscopy

Alper Uzun , Volkan Ortalan , Yalin Hao +2 more

Highly dispersed supported gold offers unprecedented catalytic properties. Determination of the dependence of the catalytic properties on the gold nanocluster size requires the ...

2009 ACS Nano 81 citations

Onset of Catalytic Activity of Gold Clusters on Titania with the Appearance of Nonmetallic Properties

Mika Valden , X. Lai , D. Wayne Goodman

Gold clusters ranging in diameter from 1 to 6 nanometers have been prepared on single crystalline surfaces of titania in ultrahigh vacuum to investigate the unusual size depende...

1998 Science 4099 citations

Identification of Active Gold Nanoclusters on Iron Oxide Supports for CO Oxidation

Andrew A. Herzing , Christopher J. Kiely , Albert F. Carley +2 more

Gold nanocrystals absorbed on metal oxides have exceptional properties in oxidation catalysis, including the oxidation of carbon monoxide at ambient temperatures, but the identi...

2008 Science 1519 citations

Publication Info

Year: 2007
Type: article
Volume: 315
Issue: 5819
Pages: 1692-1696
Citations: 475
Access: Closed

External Links

View on DOI.org

Social Impact

Altmetric

Enhanced Bonding of Gold Nanoparticles on Oxidized TiO 2 (110)

PlumX Metrics

Social media, news, blog, policy document mentions

Citation Metrics

475

OpenAlex

Cite This

APA Style

                            
                                
                                    D. Matthey, 
                                
                                    J. G. Wang, 
                                
                                    Stefan Wendt
                                
                                et al.
                            
                            (2007). 
                            Enhanced Bonding of Gold Nanoparticles on Oxidized TiO <sub>2</sub> (110). 
                            Science
                            , 315
                            (5819)
                            , 1692-1696.
                            https://doi.org/10.1126/science.1135752
                        

Identifiers

DOI: 10.1126/science.1135752