Au-catalyzed oxidative condensation of renewable furfural and ethanol to produce furan-2-acrolein in the presence of molecular oxygen

Tong, Xinli; Liu, Zonghui; Hu, Jianli; Liao, Shengyun

doi:10.1016/j.apcata.2015.11.025

Cited by 37 publications

(26 citation statements)

References 25 publications

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“…Au/ZnO possesses higher density of acid sites than Au/CeO 2 and exhibits the higher activity of oxidative esterification . It can be seen from previous studies, Al 2 O 3 support shows more acid sites than others, such as ZnO, Nb 2 O 5 , Fe 2 O 3 , CeO 2 , TiO 2 , SiO 2 and Mg−Al hydrotalcite as the support of Au nanoparticles . Thus, Al 2 O 3 may be a suitable carrier for gold catalyst to synthetic methyl 3‐hydroxypropionate from 1,3‐propanediol and methanol through the oxidative esterification.…”

Section: Introductionmentioning

confidence: 63%

“…% Au/Al 2 O 3 ‐DP calcined at different temperatures (105, 150, 250, 350, 450 and 550 °C). Except for the sample calcined at 105 °C, a broad absorption peak is presented in the range of 500–800 nm owing to the surface plasmon resonance of Au metal nanoparticles . It can be observed that the Au/Al 2 O 3 ‐DP catalyst calcined at the temperature lower than 105 °C does not contain supported metallic gold species.…”

Section: Resultsmentioning

confidence: 99%

“…Except for the sample calcined at 105°C, a broad absorption peak is presented in the range of 500- 800 nm owing to the surface plasmon resonance of Au metal nanoparticles. [29,33,37] It can be observed that the Au/Al 2 O 3 -DP catalyst calcined at the temperature lower than 105°C does not contain supported metallic gold species. After the calcination at 150°C in the air atmosphere, the peak of plasmon can be observed, which is associated with the formation of metallic Au NPs.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

“…[16,20] It can be seen from previous studies, Al 2 O 3 support shows more acid sites than others, such as ZnO, Nb 2 O 5 , Fe 2 O 3 , CeO 2 , TiO 2 , SiO 2 and MgÀ Al hydrotalcite as the support of Au nanoparticles. [20,29] Thus, Al 2 O 3 may be a suitable carrier for gold catalyst to synthetic methyl 3-hydroxypropionate from 1,3-propanediol and methanol through the oxidative esterification. On the other hand, the acidic and basic properties of supported Au catalyst, as well as the particle size and valent state of Au nanoparticles will change at the different calcination temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Structure‐Activity Relationships of Au/Al₂O₃ Catalyst for the Selective Oxidative Esterification of 1,3‐Propanediol and Methanol

et al. 2019

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1.5 wt. % Au/Al2O3 catalysts were prepared using the deposition‐precipitation or colloid‐deposition method and calcined at different temperatures for the selective oxidative esterification reaction of 1,3‐propanediol and methanol to form methyl 3‐hydroxypropionate (3‐HPM). The catalysts were characterized by nitrogen adsorption, transmission electron microscopy (TEM), X‐ray diffraction (XRD), UV‐Vis diffuse reflectance spectroscopy, X‐ray photoelectron spectra (XPS), CO2 temperature‐programmed desorption (CO2‐TPD) and NH3 temperature‐programmed desorption (NH3‐TPD). The effect of the calcination temperature of the catalyst prepared by the deposition‐precipitation method on the catalytic performance for the selective oxidative esterification of 1,3‐propanediol was studied. The results showed that the conversion of 1,3‐propanediol and the selectivity of 3‐HPM increased at first and then decreased with the increase of the calcination temperature of catalyst. The highest conversion of 1,3‐propanediol and selectivity of 3‐HPM at the optimal calcination temperature of 350 °C were 92.0% and 88.5%, respectively. Considering the effects of preparation method and calcination temperature, it could be concluded that the metallic Au nanoparticles with appropriate particle size in coordination with the suitable amount of weak and middle acid and base sites, were favorable to the oxidative esterification of 1,3‐propanediol and methanol to 3‐HPM. Moreover, we found that the 1.5 wt. % Au/Al2O3 catalyst could be effectively recovered without obvious decline of the catalytic properties.

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Section: Introductionmentioning

confidence: 63%

Section: Resultsmentioning

confidence: 99%

Section: Catalyst Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structure‐Activity Relationships of Au/Al₂O₃ Catalyst for the Selective Oxidative Esterification of 1,3‐Propanediol and Methanol

et al. 2019

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“…and Ko et al. reported a simple Au/Nb 2 O 5 catalyst; however, the mean diameter of the Au particles was larger than 5 nm . As far as we know, this is the first report on highly active NPGCs (smaller than 5 nm) supported on Nb 2 O 5 .…”

Section: Co Oxidation On Au/nb2o5 Catalysts[a] Prepared By the Dr Metmentioning

confidence: 99%

Deposition of Gold Nanoparticles on Niobium Pentoxide with Different Crystal Structures for Room‐Temperature Carbon Monoxide Oxidation

2016

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Nanoparticulate gold catalysts (NPGCs) supported on niobium oxides (Nb2O5) were prepared by different deposition methods. Au nanoparticles (NPs) with a mean diameter of approximately 5 nm were deposited by conventional deposition methods, which include the deposition‐precipitation (DP) and deposition‐reduction (DR) methods, on layered‐type Nb2O5 that possesses a deformed orthorhombic structure. Moreover, Au NPs with a mean diameter of approximately 2.7 nm could be deposited by the sol immobilization method on several crystalline forms of Nb2O5 (deformed orthorhombic, pseudohexagonal, and orthorhombic). NPGCs deposited on deformed orthorhombic Nb2O5 had a higher catalytic activity for CO oxidation. The temperature for 50 % CO conversion was 11 °C for 1 wt % Au/Nb2O5 (deformed orthorhombic) prepared by the sol immobilization method, and the CO conversion was 91 % at 28 °C. As far as we know, this is the first report of highly active Au NPGCs (smaller than 3 nm in diameter) supported on Nb2O5. NPGCs supported on acidic metal oxides will expand the utilization of gold catalysts for new applications.

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Recent Progress in Catalytic Oxidative Transformations of Alcohols by Supported Gold Nanoparticles

2019

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Catalytic oxidative transformations of alcohols constitute one of the greatly important protocols for the synthesis of various aldehydes, ketones, acids, imines, amides, etc. that are required to make drug intermediates, food additives, plastics, detergents and cosmetics. The potential of gold nanoparticles (Au NPs) in catalytic oxidation reactions is generally competent owing to their tendency to activate oxygen. Supports play a conspicuous and increasingly important role not only in the preparation and stabilization of Au NPs, but also can address the issues of sustainability by facilitating separation and reusability of the catalyst. This review aims to systematically discuss the impressive developments in catalytic oxidative transformations of alcohols promoted by supported Au NPs in the last five years. These Au NPs exhibit unique electronic properties and crystal structures, which gives us an excellent opportunity to correlate atomic structure with intrinsic catalytic properties over Au NPs. The effect of a support on the significant properties of Au NPs in terms of catalytic activity, selectivity, recyclability, and stability is discussed at length. The tentative reaction mechanisms and the structure‐performance relationships are also discussed at appropriate places, which will provide some clues for the design of efficient Au NPs‐based catalysts.

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Au-catalyzed oxidative condensation of renewable furfural and ethanol to produce furan-2-acrolein in the presence of molecular oxygen

Cited by 37 publications

References 25 publications

Structure‐Activity Relationships of Au/Al₂O₃ Catalyst for the Selective Oxidative Esterification of 1,3‐Propanediol and Methanol

Structure‐Activity Relationships of Au/Al₂O₃ Catalyst for the Selective Oxidative Esterification of 1,3‐Propanediol and Methanol

Deposition of Gold Nanoparticles on Niobium Pentoxide with Different Crystal Structures for Room‐Temperature Carbon Monoxide Oxidation

Recent Progress in Catalytic Oxidative Transformations of Alcohols by Supported Gold Nanoparticles

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Au-catalyzed oxidative condensation of renewable furfural and ethanol to produce furan-2-acrolein in the presence of molecular oxygen

Cited by 37 publications

References 25 publications

Structure‐Activity Relationships of Au/Al2O3 Catalyst for the Selective Oxidative Esterification of 1,3‐Propanediol and Methanol

Structure‐Activity Relationships of Au/Al2O3 Catalyst for the Selective Oxidative Esterification of 1,3‐Propanediol and Methanol

Deposition of Gold Nanoparticles on Niobium Pentoxide with Different Crystal Structures for Room‐Temperature Carbon Monoxide Oxidation

Recent Progress in Catalytic Oxidative Transformations of Alcohols by Supported Gold Nanoparticles

Contact Info

Product

Resources

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Structure‐Activity Relationships of Au/Al₂O₃ Catalyst for the Selective Oxidative Esterification of 1,3‐Propanediol and Methanol

Structure‐Activity Relationships of Au/Al₂O₃ Catalyst for the Selective Oxidative Esterification of 1,3‐Propanediol and Methanol