Behaviour of palladium and ruthenium catalysts on alumina and silica prepared by gas and liquid phase deposition in cinnamaldehyde hydrogenation

Lashdaf, M.; Krause, A.O.I.; Lindblad, Marina; Karinen, Reetta; Venäläinen, Tapani

doi:10.1016/s0926-860x(02)00423-4

Cited by 89 publications

(69 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reaction was monitored by taking *1.0 mL samples from the reaction mixture periodically to determine the conversion and selectivity. Generally, polar solvents will lead to many undesired products even at lower reaction temperatures [40,41]. To avoid this, nonpolar cyclohexane was used as the solvent in this study.…”

Section: Hydrogenation and Analysismentioning

confidence: 99%

Selective Hydrogenation of Cinnamaldehyde to Hydrocinnamaldehyde over SiO2 Supported Nickel Phosphide Catalysts

2008

View full text Add to dashboard Cite

A series of SiO 2 supported transition metal (Fe, Co, Ni, Mo and W) phosphide catalysts were synthesized and tested for the selective hydrogenation of cinnamaldehyde (CMA). Among these tested catalysts, Ni 12 P 5 /SiO 2 and Ni 2 P/SiO 2 prepared with initial Ni/P ratios of 2/1.3 and 1/1 exhibited high activity and selectivity for the conversion of CMA to hydrocinnamaldehyde (HCMA). The two nickel phosphide catalysts showed selectivity to HCMA up to 90% at a conversion of 90%. The properties of the nickel phosphide catalysts were characterized by BET surface area determinations, X-ray powder diffraction (XRD) analysis, and transmission electron microscopy (TEM). The influences of reaction temperature, hydrogen pressure, Ni/P ratio, and reduction temperature were studied in detail. For comparison, Pd/SiO 2 catalyst was also used in this reaction, and the possible reasons for the different catalytic performances of the two kinds of catalysts are presented.

show abstract

Section: Hydrogenation and Analysismentioning

confidence: 99%

Selective Hydrogenation of Cinnamaldehyde to Hydrocinnamaldehyde over SiO2 Supported Nickel Phosphide Catalysts

2008

View full text Add to dashboard Cite

show abstract

“…The selective hydrogenation of cinnamaldehyde (CALD) [14][15][16] to hydrocinnamaldehyde (HCALD) is of interest for avor and fragrance industries. 17 Moreover, the reaction is structure-sensitive, as its performance depends on the type of exposed crystallographic planes, 18-21 the nature and size of the metallic NPs, 17,19,[22][23][24][25][26] and the nature of the support. 22,23 Some studies have shown the interest of using TiO 2 as a support for modifying the activity and the selectivity of Au NPs.…”

mentioning

confidence: 99%

“…[57][58][59][60][61][62] They generally result from the reaction of solvents with the hydrocarbon reactant or its hydrogenated, isomerized, or C-O hydrogenolyzed products. 24,61 Acetals are generally formed when using light alcohols as solvents. However, Rylander and Himelstein have shown that the use of light alcohols is benecial to the activity.…”

mentioning

confidence: 99%

Monitoring in situ the colloidal synthesis of AuRh/TiO₂ selective-hydrogenation nanocatalysts

et al. 2017

View full text Add to dashboard Cite

AuRh nanoparticles (NPs) of various compositions and sizes in the 2-4 nm range were synthesized using a colloidal approach and were characterized at each preparation step by dynamic light scattering (DLS), ultraviolet-visible (UV-vis) spectroscopy, and liquid-phase transmission electron microscopy (liquid TEM).The AuRh colloids appear relatively instable, leading to their gradual coalescence. After fast immobilization of the metallic nanoparticles on rutile TiO 2 nanorods, the materials were investigated by high-resolution transmission electron microscopy (HRTEM) and low-temperature CO adsorption monitored by Fourier transform infrared (FTIR) spectroscopy. The inherent lack of miscibility between Au and Rh leads to partial segregation inside the NPs, which is further exalted after a reducing thermal treatment applied for PVA removal. The catalytic properties in the liquid-phase selective hydrogenation of cinnamaldehyde to hydrocinnamaldehyde are strongly influenced by these nanostructural modifications. While in as-prepared samples the intermixing between Au and Rh phases promotes the catalytic performances for Rh-rich AuRh catalysts through Au-induced stabilization of Rh in its metallic form, segregation into Janus particles after reduction decreases the catalytic activity.Bimetallic nanoparticles are of prominent importance in heterogeneous catalysis since the choices of metals and compositions allow one to tune the catalyst selectivity and improve its activity and stability.

show abstract

“…Different types of supported palladium catalysts such as Pd/carbon [31,32], Pd/SiO2 [33], Pd/Al2O3 [34], Pd/TiO2 [35], Pd/Fe2O3@C [36] have been reported to be efficient catalytic system for the hydrogenation of cinnamaldehyde. Graphene-supported Ni nanocatalyst shows selective hydrogenation towards C=C bond under atmospheric pressure [25].…”

Section: Introductionmentioning

confidence: 99%

“…Szumełda et al have shown that carbon supported PdAu catalyst also shows selective hydrogenation activity under atmospheric pressure [37]. High surface area alumina with narrow pore size distribution acts as an effective support for catalytic reaction [34].…”

Section: Introductionmentioning

confidence: 99%

Chemoselective hydrogenation of cinnamaldehyde at atmospheric pressure over combustion synthesized Pd catalysts

Das

Pal

Llorca

et al. 2017

Reac Kinet Mech Cat

View full text Add to dashboard Cite

show abstract

Behaviour of palladium and ruthenium catalysts on alumina and silica prepared by gas and liquid phase deposition in cinnamaldehyde hydrogenation

Cited by 89 publications

References 22 publications

Selective Hydrogenation of Cinnamaldehyde to Hydrocinnamaldehyde over SiO2 Supported Nickel Phosphide Catalysts

Selective Hydrogenation of Cinnamaldehyde to Hydrocinnamaldehyde over SiO2 Supported Nickel Phosphide Catalysts

Monitoring in situ the colloidal synthesis of AuRh/TiO₂ selective-hydrogenation nanocatalysts

Chemoselective hydrogenation of cinnamaldehyde at atmospheric pressure over combustion synthesized Pd catalysts

Contact Info

Product

Resources

About

Behaviour of palladium and ruthenium catalysts on alumina and silica prepared by gas and liquid phase deposition in cinnamaldehyde hydrogenation

Cited by 89 publications

References 22 publications

Selective Hydrogenation of Cinnamaldehyde to Hydrocinnamaldehyde over SiO2 Supported Nickel Phosphide Catalysts

Selective Hydrogenation of Cinnamaldehyde to Hydrocinnamaldehyde over SiO2 Supported Nickel Phosphide Catalysts

Monitoring in situ the colloidal synthesis of AuRh/TiO2 selective-hydrogenation nanocatalysts

Chemoselective hydrogenation of cinnamaldehyde at atmospheric pressure over combustion synthesized Pd catalysts

Contact Info

Product

Resources

About

Monitoring in situ the colloidal synthesis of AuRh/TiO₂ selective-hydrogenation nanocatalysts