scholarly journals Magnetic Fe3O4-Supported Gold Nanoflowers with Lattice-Selected Surfaces: Preparation and Catalytic Performance

ACS Omega ◽  
2020 ◽  
Vol 5 (25) ◽  
pp. 15755-15760
Author(s):  
Yoshiro Imura ◽  
Ryota Kan ◽  
Ryota Akiyama ◽  
Haruna Saito ◽  
Clara Morita-Imura ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Gold Nanoflowers ◽  
Supported Gold ◽  
Magnetic Fe3o4

Carbon-Supported Gold Catalyst Modified by Doping with Ag for Cyclohexene Oxidation

2011 ◽  
Vol 236-238 ◽  
pp. 3046-3050
Author(s):  
Zhen Yu Cai ◽  
Ming Qiao Zhu ◽  
Yue Tang ◽  
Yi Liu ◽  
Huan Dai ◽  
...  
Keyword(s):  
Gold Catalyst ◽  
Catalytic Performance ◽  
Cyclohexene Oxide ◽  
Cyclohexene Oxidation ◽  
X Ray Diffraction ◽  
Efficient Catalyst ◽  
X Ray ◽  
Supported Gold Catalysts ◽  
Transmission Electron ◽  
Supported Gold

Carbon-supported gold catalysts Au/C were prepared by an impregnation-reduction method and modified by AgNO3to obtain bi-metallic catalysts Au-Ag/C, which were characterized by X-ray-diffraction (XRD) and Transmission Electron Microscope (TEM). Their catalytic performance was tested in the oxidation of cyclohexene in an autoclave without any solvent. The results showed that Ag doping can significantly enhance the catalytic performance of carbon-supported gold catalyst. Au(1.0 wt.%)-Ag(1.0 wt.%)/C has been found to be an efficient catalyst for the cyclohexene oxidation with a conversion of 27.6% at 80 °C and 0.4 MPa for 12 h while selectivity for ∑C6products (including cyclohexene oxide, 2-cyclohexene-1-ol, 2-cyclohexene-1-one and cyclohexane-1,2-diol) exceeding 88.9%, especially the selectivity of cyclohexane-1,2-diol up to 47.6%. Moreover, the effects of Au, Ag content on catalytic performance were also reported.

scholarly journals Catalytic performance of cobalt oxide-supported gold-palladium nanocatalysts for the removal of toluene and o -xylene

2017 ◽  
Vol 38 (2) ◽  
pp. 207-216 ◽  
Author(s):  
Zhiwei Wang ◽  
Yuxi Liu ◽  
Tao Yang ◽  
Jiguang Deng ◽  
Shaohua Xie ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Catalytic Performance ◽  
Palladium Nanocatalysts ◽  
Supported Gold

Solvent-free oxidation of benzyl alcohol using titania-supported gold–palladium catalysts: Effect of Au–Pd ratio on catalytic performance

2007 ◽  
Vol 122 (3-4) ◽  
pp. 407-411 ◽  
Author(s):  
Dan I. Enache ◽  
Dean Barker ◽  
Jennifer K. Edwards ◽  
Stuart H. Taylor ◽  
David W. Knight ◽  
...  
Keyword(s):  
Benzyl Alcohol ◽  
Palladium Catalysts ◽  
Catalytic Performance ◽  
Solvent Free ◽  
Oxidation Of Benzyl Alcohol ◽  
Gold Palladium Catalysts ◽  
Supported Gold ◽  
Free Oxidation

scholarly journals Gold catalysts containing interstitial carbon atoms boost hydrogenation activity

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Yafei Sun ◽  
Yueqiang Cao ◽  
Lili Wang ◽  
Xiaotong Mu ◽  
Qingfei Zhao ◽  
...  
Keyword(s):  
Gold Catalyst ◽  
Catalytic Performance ◽  
Activation Entropy ◽  
Hydrogenation Activity ◽  
Noble Metal Catalysts ◽  
Heterogeneous Catalytic ◽  
Chemoselective Hydrogenation ◽  
Heterolytic Dissociation ◽  
Supported Gold Nanoparticles ◽  
Supported Gold

Abstract Supported gold nanoparticles are emerging catalysts for heterogeneous catalytic reactions, including selective hydrogenation. The traditionally used supports such as silica do not favor the heterolytic dissociation of hydrogen on the surface of gold, thus limiting its hydrogenation activity. Here we use gold catalyst particles partially embedded in the pore walls of mesoporous carbon with carbon atoms occupying interstitial sites in the gold lattice. This catalyst allows improved electron transfer from carbon to gold and, when used for the chemoselective hydrogenation of 3-nitrostyrene, gives a three times higher turn-over frequency (TOF) than that for the well-established Au/TiO2 system. The d electron gain of Au is linearly related to the activation entropy and TOF. The catalyst is stable, and can be recycled ten times with negligible loss of both reaction rate and overall conversion. This strategy paves the way for optimizing noble metal catalysts to give an enhanced hydrogenation catalytic performance.

The Preparation of Stable TiO2 Nanotubes Supported Gold Catalysts and Their Catalytic Performance for CO Oxidation

2012 ◽  
Vol 4 (2) ◽  
pp. 118-122
Author(s):  
B.L. Zhu ◽  
W.L. Zhao ◽  
Q.W. Han ◽  
J. Chen ◽  
S.R. Wang ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Tio2 Nanotubes ◽  
Gold Catalysts ◽  
Catalytic Performance ◽  
Supported Gold Catalysts ◽  
Supported Gold

scholarly journals One-step fabrication of hollow-channel gold nanoflowers with excellent catalytic performance and large single-particle SERS activity

Nanoscale ◽  
2016 ◽  
Vol 8 (32) ◽  
pp. 14932-14942 ◽  
Author(s):  
Sunjie Ye ◽  
Felix Benz ◽  
May C. Wheeler ◽  
Joseph Oram ◽  
Jeremy J. Baumberg ◽  
...  
Keyword(s):  
Single Particle ◽  
Catalytic Performance ◽  
Gold Nanoflowers ◽  
One Step ◽  
Excellent Catalytic Performance

scholarly journals Enhanced Catalytic Activity of Supported Gold Catalysts for Oxidation of Noxious Environmental Pollutant CO

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Pranjal Saikia ◽  
Abu Taleb Miah ◽  
Banajit Malakar ◽  
Ankur Bordoloi
Keyword(s):  
Catalytic Activity ◽  
Physicochemical Characterization ◽  
Catalytic Performance ◽  
Environmental Pollutant ◽  
Bet Surface Area ◽  
Research Attention ◽  
Supported Gold Catalysts ◽  
Co Conversion ◽  
Ft Ir ◽  
Supported Gold

Noble metal nanomaterials have attracted mounting research attention for applications in diverse fields of catalysis, biology, and nanotechnology. In the present study, we have undertaken a detailed investigation on synthesis, characterization, and catalytic activity studies for CO oxidation by nanogold catalysts supported over CeO2 and CeO2-ZrO2 (1 : 1 mole ratio). The support systems were prepared by modified, simple precipitation technique and the Au supported samples were synthesized using deposition-precipitation with urea method. The physicochemical characterization was performed by XRD, ICP-AES, BET surface area, FT-IR, UV-Vis DRS, Raman Spectroscopy, TEM, and XPS techniques. Au/CeO2 catalyst showed more than 80% CO conversions at 30°C, whereas Au/CeO2-ZrO2 exhibited ~100% CO conversion at that temperature. The catalytic performance of Au catalysts is highly dependent on the nature of the support.

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