Publisher’s Note: “Binding energies of CO on gold cluster cations Aun+ (n=1–65): A radiative association kinetics study” [J. Chem. Phys. 122, 104702 (2005)]

Neumaier, Marco; Weigend, Florian; Hampe, Oliver; Kappes, Manfred M.

doi:10.1063/1.2006047

Cited by 32 publications

(75 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the case of thiol-stabilized gold clusters, a specific species of Au 25 (SG) 18 (SG: glutathionate) was prepared and tested for styrene oxidation with molecular oxygen to benzaldehyde and hydrogenation of unsaturated aldehydes to unsaturated alcohols. 51 It was anticipated that thiolates might poison the catalysis by gold due to their high coverage on gold surfaces; however, when the coverage by thiolates was not too high, reactant molecules could approach the surfaces to be subjected to reaction.…”

Section: Gold Clusters Stabilized or Supported By Organic Compounds Imentioning

confidence: 99%

“…48 Extensive investigation was focused on Au 25 (SG) 18 (SG: glutathionate) supported on SiO 2 by the group of Jin, 4951 while the group of Tsukuda focused on thiolate-ligand-free Au 25 clusters supported on HAP. 52 In the styrene epoxidation with tert-butyl hydroperoxide (TBHP) in toluene solvent at 353 K, Au 25 supported on HAP produced styrene epoxide with selectivity of 92% at 100% Figure 8.…”

Section: ¹1mentioning

confidence: 99%

Section: ¹1mentioning

confidence: 99%

“…On Au 25 (SG) 18 supported on SiO 2 the selectivity to epoxide and aldehyde is tunable by choosing solvent: toluene for benzaldehyde (selectivity 100%) and acetonitrile for styrene epoxide (selectivity >95%). On Au 25 (SG) 18 supported on TiO 2 oxidation of sulfides with iodosylbenzene (PhIO) in dichloromethane (DCM) at 313 K yielded sulfoxides with selectivity of about 92% at 97% conversion. 53 A constraint in thiolated gold clusters supported on metal oxides is that they are not active for molecular oxygen and need organic oxidizers; however, it was a surprise that oxidation reaction could take place even on thiolated surfaces of gold.…”

Section: ¹1mentioning

confidence: 99%

“…The adsorption energy of CO on gold cluster cations Au n + showed maxima with n = 30, 31, 48, and 49. 18 CO oxidation was studied by free Au 2 ¹ through experiments and calculations at temperatures below 350 K. 19 A key intermediate with a mass of Au 2 CO 3 ¹ was observed. Coadsorption of CO and O 2 showed interesting experimental results.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Size- and Structure-specificity in Catalysis by Gold Clusters

2014

View full text Add to dashboard Cite

Although gold in bulk is poorly active as a catalyst, it exhibits surprisingly high catalytic activity when deposited as nanoparticles (NPs) on base metal oxides. The catalytic performance of supported gold NPs can be created by choosing the kind of support materials, by controlling the size of gold, and by building up strong contact of gold with the supports. Since perimeter interfaces around gold NPs act, in principle, as the active sites for oxidation and hydrogenation, gold should be smaller than 10 nm in diameter. A new area of research is clusters, which are smaller than 2 nm in diameter and less than 200 atoms. Gold clusters possess electronic structures different from those of bulk gold and at the same time provide increased fractions of edges and corners which are highly unsaturatedly coordinated sites. Accordingly, gold clusters will be blessed by unique catalytic performance, and many examples have recently been emerging. This article summarizes such examples in terms of "size-and structure-specificity," covering gas-phase free clusters, polymer-or organic-ligand-stabilized clusters in liquid phase, and clusters supported on base metal oxides, carbon materials, and organic polymers for gas-phase and liquid-phase reactions.

show abstract

Section: Gold Clusters Stabilized or Supported By Organic Compounds Imentioning

confidence: 99%

Section: ¹1mentioning

confidence: 99%

Section: ¹1mentioning

confidence: 99%

Section: ¹1mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Size- and Structure-specificity in Catalysis by Gold Clusters

2014

View full text Add to dashboard Cite

show abstract

Adsorption of Propene on Neutral Gold Clusters in the Gas Phase

Janssens

Lievens

2015

Chemistry A European J

View full text Add to dashboard Cite

The adsorption of propene on neutral gold clusters is investigated in a collision cell under a few collision conditions. The adsorption reaction is studied by pressure-dependent kinetic measurements and delayed unimolecular dissociation of the excited Aun propene complexes. The cluster size (n=9-25) and temperature (T=90-300 K) dependence of the propene adsorption is analyzed. Strong size dependences of the absorption reaction are observed; a larger propene adsorption probability was found for gold clusters composed of an even number of atoms. Propene binding energies are estimated by comparison of the temperature-dependent unimolecular dissociation rates with rates obtained by using statistical RRKM modeling. The Aun -propene binding energies decrease non-monotonously with cluster size and are in the range of 1.2-0.85 eV for n=9-25. Finally, the bonding of C3 H6 on Aun is qualitatively described and similarities with the absorption of CO molecules on gold clusters are discussed.

show abstract

Co‐Adsorption of O₂ and CO on Au₂⁻: Infrared Photodissociation Spectroscopy and Theoretical Study of [Au₂O₂(CO)_n]⁻ (n=2–6)

Liu

Xing

Wang

et al. 2016

Chemistry A European J

View full text Add to dashboard Cite

The co-adsorption of O and CO on anionic sites of gold species is considered as a crucial step in the catalytic CO oxidation on gold catalysts. In this regard, the [Au O (CO) ] (n=2-6) complexes were prepared by using a laser vaporization supersonic ion source and were studied by using infrared photodissociation spectroscopy in the gas phase. All the [Au O (CO) ] (n=2-6) complexes were characterized to have a core structure involving one CO and one O molecule co-adsorbed on Au with the other CO molecules physically tagged around. The CO stretching frequency of the [Au O (CO)] core ion is observed around ν˜ =2032-2042 cm , which is about 200 cm higher than that in [Au (CO) ] . This frequency difference and the analyses based on density functional calculations provide direct evidence for the synergy effect of the chemically adsorbed O and CO. The low lying structures with carbonate group were not observed experimentally because of high formation barriers. The structures and the stability (i.e., the inertness in a sense) of the co-adsorbed O and CO on Au may have relevance to the elementary reaction steps on real gold catalysts.

show abstract

Publisher’s Note: “Binding energies of CO on gold cluster cations Aun+ (n=1–65): A radiative association kinetics study” [J. Chem. Phys. 122, 104702 (2005)]

Abstract: Reactions of mixed silver-gold cluster cations with CO: Radiative association kinetics and density functional theory computations The Journal of Chemical Physics 125, 104308 (2006)

Cited by 32 publications

References 0 publications

Size- and Structure-specificity in Catalysis by Gold Clusters

Size- and Structure-specificity in Catalysis by Gold Clusters

Adsorption of Propene on Neutral Gold Clusters in the Gas Phase

Co‐Adsorption of O₂ and CO on Au₂⁻: Infrared Photodissociation Spectroscopy and Theoretical Study of [Au₂O₂(CO)_n]⁻ (n=2–6)

Contact Info

Product

Resources

About

Publisher’s Note: “Binding energies of CO on gold cluster cations Aun+ (n=1–65): A radiative association kinetics study” [J. Chem. Phys. 122, 104702 (2005)]

Abstract: Reactions of mixed silver-gold cluster cations with CO: Radiative association kinetics and density functional theory computations The Journal of Chemical Physics 125, 104308 (2006)

Cited by 32 publications

References 0 publications

Size- and Structure-specificity in Catalysis by Gold Clusters

Size- and Structure-specificity in Catalysis by Gold Clusters

Adsorption of Propene on Neutral Gold Clusters in the Gas Phase

Co‐Adsorption of O2 and CO on Au2−: Infrared Photodissociation Spectroscopy and Theoretical Study of [Au2O2(CO)n]− (n=2–6)

Contact Info

Product

Resources

About

Co‐Adsorption of O₂ and CO on Au₂⁻: Infrared Photodissociation Spectroscopy and Theoretical Study of [Au₂O₂(CO)_n]⁻ (n=2–6)