Aerobic oxidation of alcohols in the liquid phase with nanoporous gold catalysts

2012 ◽  
Vol 48 (38) ◽  
pp. 4540 ◽  
Author(s):  
Naoki Asao ◽  
Naoya Hatakeyama ◽  
Menggenbateer ◽  
Taketoshi Minato ◽  
Eisuke Ito ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Aerobic Oxidation ◽  
Gold Catalysts ◽  
Nanoporous Gold ◽  
Oxidation Of Alcohols

On the Role of Oxygen in the Liquid-Phase Aerobic Oxidation of Alcohols on Palladium

2002 ◽  
Vol 211 (1) ◽  
pp. 244-251 ◽  
Author(s):  
C KERESSZEGI ◽  
T BURGI ◽  
T MALLAT ◽  
A BAIKER
Keyword(s):  
Liquid Phase ◽  
Aerobic Oxidation ◽  
Oxidation Of Alcohols

scholarly journals Metal-Support Synergy of Supported Gold Nanoclusters in Selective Oxidation of Alcohols

Catalysts ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 107
Author(s):  
Lu Liu ◽  
Huayin Li ◽  
Yuan Tan ◽  
Xingkun Chen ◽  
Ronghe Lin ◽  
...  
Keyword(s):  
Particle Size ◽  
Aerobic Oxidation ◽  
Gold Nanoclusters ◽  
Gold Catalysts ◽  
Photoelectron Spectra ◽  
Base Property ◽  
Gold Particles ◽  
X Ray ◽  
Oxidation Of Alcohols ◽  
Metal Support

Gold catalysts have been reported to exhibit good performance in aerobic oxidation of alcohols, but the intrinsic origin of the catalytic reactivity is still illusive. The catalyst preparation method, the morphology of the gold particles, and even the support might be key factors that determine the activity. Here, we prepared a series of gold catalysts with different supports, i.e., the hydrotalcite (HT), ZnO, MgO, Al2O3, and SiO2, by using the atomically controlled Au25 nanoclusters (NCs) as the gold precursor. The characterization results of the X-ray diffraction (XRD), UV-vis and transmission electron microscopy (TEM) show that the gold particles were mostly uniformly distributed on the supports, with a mean particle size within 3 nm. In aerobic oxidation of benzyl alcohol, the MgAl-HT- and Al2O3-supported Au25 NCs display good performances, with turnover frequency (TOF) values of ~2927 and 2892 h−1, respectively, whereas the SiO2-, MgO-, and ZnO-supported analogues show much inferior activity. The high resolution TEM and X-ray photoelectron spectra (XPS) results suggest that the interactions between gold and the supports in different samples are differing, which influences the morphology and the nature of gold. Our results further point to the importance of acid-base property of the support and the metal-support synergy rather than the gold particle size alone in achieving high-performance in selective alcohol oxidation. Moreover, this work provided a good way to design gold catalysts with controllable sizes that is crucial for understanding the reaction process in aerobic oxidation of alcohol.

Aerobic Oxidation of Alcohols over Gold Catalysts: Role of Acid and Base

2008 ◽  
Vol 126 (3-4) ◽  
pp. 213-217 ◽  
Author(s):  
Søren K. Klitgaard ◽  
Andrew T. DeLa Riva ◽  
Stig Helveg ◽  
Rebecka M. Werchmeister ◽  
Claus H. Christensen
Keyword(s):  
Aerobic Oxidation ◽  
Gold Catalysts ◽  
Oxidation Of Alcohols ◽  
Acid And Base
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