CO Adsorption on Gold Clusters Stabilized on Ceria−Titania Mixed Oxides:  Comparison with Reference Catalysts

2006 ◽  
Vol 110 (46) ◽  
pp. 23329-23336 ◽  
Author(s):  
Floriana Vindigni ◽  
Maela Manzoli ◽  
Anna Chiorino ◽  
Tatyana Tabakova ◽  
Flora Boccuzzi
Keyword(s):  
Mixed Oxides ◽  
Co Adsorption ◽  
Gold Clusters

Theoretical Insights on O2and CO Adsorption on Neutral and Positively Charged Gold Clusters

2006 ◽  
Vol 110 (25) ◽  
pp. 12240-12248 ◽  
Author(s):  
Antonio Prestianni ◽  
Antonino Martorana ◽  
Frédéric Labat ◽  
Ilaria Ciofini ◽  
Carlo Adamo
Keyword(s):  
Co Adsorption ◽  
Gold Clusters ◽  
Positively Charged

Theoretical study of CO adsorption on yttrium-doped gold clusters AunY (n=1–9)

2010 ◽  
Vol 498 (4-6) ◽  
pp. 296-301 ◽  
Author(s):  
Ling Lin ◽  
Peter Lievens ◽  
Minh Tho Nguyen
Keyword(s):  
Theoretical Study ◽  
Co Adsorption ◽  
Gold Clusters

CO adsorption on pure and binary-alloy gold clusters: A quantum chemical study

2006 ◽  
Vol 125 (19) ◽  
pp. 194707 ◽  
Author(s):  
Ajay M. Joshi ◽  
Mark H. Tucker ◽  
W. Nicholas Delgass ◽  
Kendall T. Thomson
Keyword(s):  
Binary Alloy ◽  
Quantum Chemical ◽  
Co Adsorption ◽  
Quantum Chemical Study ◽  
Chemical Study ◽  
Gold Clusters

Formation of Gold Clusters on La–Ni Mixed Oxides and Its Catalytic Performance for Isomerization of Allylic Alcohols to Saturated Aldehydes

2014 ◽  
Vol 43 (8) ◽  
pp. 1368-1370 ◽  
Author(s):  
Tamao Ishida ◽  
Jun Aimoto ◽  
Akiyuki Hamasaki ◽  
Hironori Ohashi ◽  
Tetsuo Honma ◽  
...  
Keyword(s):  
Mixed Oxides ◽  
Catalytic Performance ◽  
Gold Clusters ◽  
Allylic Alcohols

Very low rate constants of bimolecular CO adsorption on anionic gold clusters: Implications for catalytic activity

2003 ◽  
Vol 5 (6) ◽  
pp. 1213-1218 ◽  
Author(s):  
Iulia Balteanu ◽  
O. Petru Balaj ◽  
Brigitte S. Fox ◽  
Martin K. Beyer ◽  
Zdeněk Bastl ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Rate Constants ◽  
Co Adsorption ◽  
Gold Clusters ◽  
Low Rate

scholarly journals Efficient Synthesis of Methyl Methacrylate by One Step Oxidative Esterification over Zn-Al-Mixed Oxides Supported Gold Nanocatalysts

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 162
Author(s):  
Huayin Li ◽  
Yuan Tan ◽  
Xingkun Chen ◽  
Wenshao Yang ◽  
Chuanqi Huang ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Mixed Oxides ◽  
Gold Catalyst ◽  
Co Adsorption ◽  
Gold Catalysts ◽  
Esterification Reaction ◽  
X Ray ◽  
Oxidative Esterification ◽  
One Step ◽  
Supported Gold

Methyl methacrylate (MMA) is an important monomer in fine chemicals. The synthesis of MMA by one-step oxidative esterification from methacrolein with methanol over a heterogeneous catalyst with high activity, selectivity and stability is highly desirable. Herein, Zn-Al-hydrotalcites (HTs)-supported atomically precise Au25 nanoclusters with different molar ratios of Zn2+/Al3+ were prepared and used as the precursors for this reaction. They exhibited good performances in comparison with the gold catalysts prepared by the deposition precipitation method. The structural and electronic properties were evaluated by various characterization technologies, including X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), in situ diffuse reflectance infrared Fourier-transform spectroscopy (DRIFTS) of CO adsorption, X-ray photoelectron spectroscopy (XPS), and CO2 temperature-programmed desorption (TPD). The combined characterization results suggested that the adsorption property of gold and the basicity of the catalyst contributes to their high activities. Substrates extended experiments and stability tests implied the potential application of Zn-Al-mixed oxides supported gold catalysts, which paves a new way for supported gold catalyst in the one-step oxidation esterification reaction.

Theoretical study of AunV-CO, n = 1–14: The dopant vanadium enhances CO adsorption on gold clusters

2012 ◽  
Vol 137 (16) ◽  
pp. 164312 ◽  
Author(s):  
Pham Vu Nhat ◽  
Truong Ba Tai ◽  
Minh Tho Nguyen
Keyword(s):  
Theoretical Study ◽  
Co Adsorption ◽  
Gold Clusters

Crystal structure images of large gold clusters and growing crystals by HRTEM

1984 ◽  
Vol 42 ◽  
pp. 428-429
Author(s):  
L.R. Wallenberg ◽  
J.-O. Bovin ◽  
G. Schmid
Keyword(s):  
Crystal Structure ◽  
Nucleation And Growth ◽  
Close Packing ◽  
Gold Clusters ◽  
Molecular Weight Determination ◽  
Growth Mechanisms ◽  
Starting Point ◽  
Different Types ◽  
Nucleation And Growth Mechanisms ◽  
Points Of View

Metallic clusters are interesting from various points of view, e.g. as a mean of spreading expensive catalysts on a support, or following heterogeneous and homogeneous catalytic events. It is also possible to study nucleation and growth mechanisms for crystals with the cluster as known starting point.Gold-clusters containing 55 atoms were manufactured by reducing (C6H5)3PAuCl with B2H6 in benzene. The chemical composition was found to be Au9.2[P(C6H5)3]2Cl. Molecular-weight determination by means of an ultracentrifuge gave the formula Au55[P(C6H5)3]Cl6 A model was proposed from Mössbauer spectra by Schmid et al. with cubic close-packing of the 55 gold atoms in a cubeoctahedron as shown in Fig 1. The cluster is almost completely isolated from the surroundings by the twelve triphenylphosphane groups situated in each corner, and the chlorine atoms on the centre of the 3x3 square surfaces. This gives four groups of gold atoms, depending on the different types of surrounding.

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