Hydrogen Interaction with a Ceria−Zirconia Supported Gold Catalyst. Influence of CO Co-adsorption and Pretreatment Conditions

2007 ◽  
Vol 111 (39) ◽  
pp. 14371-14379 ◽  
Author(s):  
Sebastián E. Collins ◽  
José M. Cíes ◽  
Eloy del Río ◽  
Miguel López-Haro ◽  
Susana Trasobares ◽  
...  
Keyword(s):  
Gold Catalyst ◽  
Co Adsorption ◽  
Hydrogen Interaction ◽  
Pretreatment Conditions ◽  
Supported Gold

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.

Photochemical Preparation of Anatase Titania Supported Gold Catalyst for Ethanol Synthesis from CO2 Hydrogenation

2017 ◽  
Vol 148 (1) ◽  
pp. 11-22 ◽  
Author(s):  
Dong Wang ◽  
Qingyuan Bi ◽  
Guoheng Yin ◽  
Peng Wang ◽  
Fuqiang Huang ◽  
...  
Keyword(s):  
Gold Catalyst ◽  
Co2 Hydrogenation ◽  
Anatase Titania ◽  
Supported Gold ◽  
Ethanol Synthesis

Preparation of Highly Dispersive Supported Gold Catalyst by Microbial Reduction Method

1998 ◽  
Vol 14 (09) ◽  
pp. 769-771
Author(s):  
Fu Jin-Kun ◽  
◽  
Liu Yue-Ying ◽  
Hu Rong-Zong ◽  
Zeng Jin-Long ◽  
...  
Keyword(s):  
Reduction Method ◽  
Gold Catalyst ◽  
Microbial Reduction ◽  
Supported Gold

scholarly journals Ultrastable Au nanoparticles on titania through an encapsulation strategy under oxidative atmosphere

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Shaofeng Liu ◽  
Wei Xu ◽  
Yiming Niu ◽  
Bingsen Zhang ◽  
Lirong Zheng ◽  
...  
Keyword(s):  
Au Nanoparticles ◽  
Gold Catalyst ◽  
Au Catalyst ◽  
Supported Gold Catalysts ◽  
Metal Support Interaction ◽  
Excellent Activity ◽  
Metal Support ◽  
Oxidative Atmosphere ◽  
Supported Gold ◽  
Special Strategy

AbstractSupported gold catalysts play a crucial role in the chemical industry; however, their poor on-stream stability because of the sintering of the gold nanoparticles restricts their practical application. The strong metal-support interaction (SMSI), an important concept in heterogeneous catalysis, may be applied to construct the structure of catalysts and, hence, improve their reactivity and stability. Here we report an ultrastable Au nanocatalyst after calcination at 800 °C, in which Au nanoparticles are encapsulated by a permeable TiOx thin layer induced by melamine under oxidative atmosphere. Owning to the formed TiOx overlayer, the resulting Au catalyst is resistant to sintering and exhibits excellent activity and stability for catalytic CO oxidation. Furthermore, this special strategy can be extended to colloidal Au nanoparticles supported on TiO2 and commercial gold catalyst denoted as RR2Ti, providing a universal way to engineer and develop highly stable supported Au catalysts with tunable activity.

The Preparation of a Residue-free, Alumina-supported Gold Catalyst by Decomposition of an Azido-Gold(III) Complex and an Evaluation of the Effectiveness of the Catalyst for the Hydrogenation of Propyne

2015 ◽  
Vol 641 (3-4) ◽  
pp. 694-698
Author(s):  
Jose Antonio Lopez-Sanchez ◽  
Clément Morisse ◽  
John M. Winfield ◽  
Burkhard Krumm ◽  
Thomas M. Klapötke ◽  
...  
Keyword(s):  
Gold Catalyst ◽  
Supported Gold

Confined synthesis of three-dimensionally ordered arrays of multilamellar silica nanoparticles as a gold catalyst support

RSC Advances ◽  
2016 ◽  
Vol 6 (104) ◽  
pp. 102258-102263 ◽  
Author(s):  
Shujun Zhou ◽  
Xinlei Yao ◽  
Tongxiang Fan
Keyword(s):  
Catalytic Activity ◽  
Silica Nanoparticles ◽  
Gold Catalyst ◽  
Catalyst Support ◽  
Three Dimensional ◽  
Ordered Arrays ◽  
Supported Gold

Three-dimensional arrays of multilamellar silica nanoparticles are prepared through confined synthesis and enhance the catalytic activity of supported gold.

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