Stereoselective hydrogenation of phenyl alkyl acetylenes on pillared clays supported palladium catalysts

Marín-Astorga, N.; Alvez-Manoli, G.; Reyes, Patricio

doi:10.1016/j.molcata.2004.09.047

Cited by 35 publications

(14 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…No distinctive peaks for Pd 3d 5/2 were observed for the flame-made Pd/SiO 2 with Pd loading between 0.5 and 2 wt.% suggesting that very low amount of Pd present on the catalyst surface. The binding energies of Pd 3d 5/2 for the 5 and 10 wt.% Pd/SiO 2 were 337.4 eV which was 0.2 eV higher than Pd 3d 5/2 on the classic Lindlar catalysts according to the literature [2]. It was also 2.3 eV higher than that corresponding to Pd 0 (335.1 eV) [30], which indicating that Pd in the flamemade Pd/SiO 2 catalyst is electron-deficient.…”

Section: Catalyst Propertiesmentioning

confidence: 77%

See 1 more Smart Citation

Characteristics and Catalytic Properties of Pd/SiO2 Synthesized by One-step Flame Spray Pyrolysis in Liquid-phase Hydrogenation of 1-Heptyne

et al. 2007

View full text Add to dashboard Cite

In this study, Pd/SiO 2 catalysts with 0.5-10 wt.% Pd loadings were prepared by one-step flame spray pyrolysis (FSP) and characterized by N 2 physisorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), CO chemisorption, and X-ray photoelectron spectroscopy (XPS). The average cluster/particles size of Pd as revealed by TEM were ca. 0.5-3 nm. The turnover frequencies (TOFs) of the flame-made catalysts decreased from 66.2 to 4.3 per s as Pd loading increased from 0.5 to 10 wt.%, suggesting that the catalytic activity was dependent on Pd particle/cluster size. However, there were no appreciable influences on 1-heptene selectivity. The flame-made Pd/SiO 2 showed better properties than the conventional prepared catalysts. Their advantages are not only the presence of large pores that facilitates diffusion of the reactants and products, but also the high-catalytic activity of as-synthesized catalysts so that further pretreatment is not necessary.

show abstract

Section: Catalyst Propertiesmentioning

confidence: 77%

“…Palladium (Pd) is the most selective of the noble metal catalysts for alkyne semihydrogenation with respect to over all alkene formation [2]. The classic Lindlar catalyst, consisting of metallic Pd on calcium carbonate support modified with lead(II) acetate, is the well known commercially available catalyst for such reaction.…”

Section: Introductionmentioning

confidence: 99%

Characteristics and Catalytic Properties of Pd/SiO2 Synthesized by One-step Flame Spray Pyrolysis in Liquid-phase Hydrogenation of 1-Heptyne

et al. 2007

View full text Add to dashboard Cite

show abstract

“…No distinctive peaks for Pd 3d 5/2 were observed for the flame-made Pd/TiO 2 with Pd loading between 0.5 and 2 wt%, indicating very low amount of Pd present on the catalyst surface. The binding energies of Pd 3d 5/2 for the impregnation-made catalysts were similar to that of the classic Lindlar catalyst [23]. The higher binding energies for the FSP catalysts indicated a stronger interaction between Pd and the TiO 2 .…”

Section: Catalyst Propertiesmentioning

confidence: 51%

Liquid-Phase Selective Hydrogenation of 1-Heptyne over Pd/TiO2 Catalyst Synthesized by One-Step Flame Spray Pyrolysis

et al. 2010

View full text Add to dashboard Cite

The Pd/TiO 2 nanoparticles synthesized by one-step flame spray pyrolysis (FSP) with Pd loadings 0.5-10 wt% showed good catalytic performances in the liquid-phase selective hydrogenation of 1-heptyne. Higher selectivities to 1-heptene at complete conversion of 1-heptyne were obtained on the FSP-derived catalysts compared to the ones prepared by conventional impregnation of palladium on the FSP-synthesized and the commercial P-25 TiO 2 supports. Based on the characterization results from X-ray diffraction (XRD), transmission electron microscopy (TEM), CO-pulse chemisorption, and X-ray photoelectron spectroscopy (XPS), the improved catalytic properties of Pd/TiO 2 were attributed to a stronger interaction/an intimate contact between the very fine Pd particles and the TiO 2 support obtained via one-step FSP synthesis.

show abstract

“…Another remarkable feature of Pd/CR11 is its reusability: it can be reused for at least five runs without any palladium leaching. 62) While clay, a raw material of ceramics, has been used for a support of the heterogeneous palladium catalyst for the hydrogenation of various functionalities, [31][32][33][34][35][36][37][38][39][40][41][42][43][44][73][74][75][76][77][78][79][80][81][82][83] the use of a ceramic as a catalyst support is very limited. 84) Although the components of the ceramic that we used for catalyst support are very similar to those of molecular sieves 3A and 5A, the ceramic contains a variety of elements, such as magnesium, titanium, iron, sulfur, and zirconium, in addition to the common elements oxygen, silicon, aluminum, potassium, and sodium.…”

Section: Introductionmentioning

confidence: 99%

Recent Development of Palladium-Supported Catalysts for Chemoselective Hydrogenation

2017

View full text Add to dashboard Cite

This paper describes practical and selective hydrogenation methodologies using heterogeneous palladium catalysts. Chemoselectivity develops dependent on the catalyst activity based on the characteristic of the supports, derived from structural components, functional groups, and/or morphologies. We especially focus on our recent development of heterogeneous palladium catalysts supported on chelate resin, ceramic, and spherically shaped activated carbon. In addition, the application of flow technology for chemoselective hydrogenation using the palladium catalysts immobilized on molecular sieves 3A and boron nitride is outlined.

show abstract

Stereoselective hydrogenation of phenyl alkyl acetylenes on pillared clays supported palladium catalysts

Cited by 35 publications

References 43 publications

Characteristics and Catalytic Properties of Pd/SiO2 Synthesized by One-step Flame Spray Pyrolysis in Liquid-phase Hydrogenation of 1-Heptyne

Characteristics and Catalytic Properties of Pd/SiO2 Synthesized by One-step Flame Spray Pyrolysis in Liquid-phase Hydrogenation of 1-Heptyne

Liquid-Phase Selective Hydrogenation of 1-Heptyne over Pd/TiO2 Catalyst Synthesized by One-Step Flame Spray Pyrolysis

Recent Development of Palladium-Supported Catalysts for Chemoselective Hydrogenation

Contact Info

Product

Resources

About