Highly dispersed ultra-small Pd nanoparticles on gadolinium hydroxide nanorods for efficient hydrogenation reactions

Nanoscale ◽  
2017 ◽  
Vol 9 (36) ◽  
pp. 13800-13807 ◽  
Author(s):  
Naseeb Ullah ◽  
M. Imran ◽  
Kuang Liang ◽  
Cheng-Zong Yuan ◽  
Akif Zeb ◽  
...  
Keyword(s):  
Pd Nanoparticles ◽  
Highly Dispersed ◽  
Hydrogenation Reactions

Highly dispersed ultra-small Pd nanoparticles on gadolinium hydroxide nanorods catalysts have been developed for excellent hydrogenation activities.

Highly dispersed Pd nanoparticles within silica: Synthesis and characterization

2011 ◽  
Vol 51 (1-2) ◽  
pp. 8-14 ◽  
Author(s):  
Ayyappan Ramakrishnan ◽  
Karifala Dumbuya ◽  
Jimmy Ofili ◽  
Hans-Peter Steinrück ◽  
J. Michael Gottfried ◽  
...  
Keyword(s):  
Pd Nanoparticles ◽  
Synthesis And Characterization ◽  
Highly Dispersed ◽  
Silica Synthesis

Mussel-inspired construction of thermo-responsive double-hydrophilic diblock copolymers-decorated reduced graphene oxide as effective catalyst supports for highly dispersed superfine Pd nanoparticles

Nanoscale ◽  
2018 ◽  
Vol 10 (26) ◽  
pp. 12487-12496 ◽  
Author(s):  
Haichao Duan ◽  
Yu Yang ◽  
Jianhua Lü ◽  
Changli Lü
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Reduced Graphene Oxide ◽  
Diblock Copolymer ◽  
Diblock Copolymers ◽  
Pd Nanoparticles ◽  
Catalyst Supports ◽  
High Catalytic Activity ◽  
Reduced Graphene ◽  
Highly Dispersed

We report a facile, mussel-inspired construction of a thermo-responsive diblock copolymer-anchored rGO support for superfine PdNPs with high catalytic activity.

scholarly journals Supports and modified nano-particles for designing model catalysts

2016 ◽  
Vol 188 ◽  
pp. 309-321 ◽  
Author(s):  
C. P. O'Brien ◽  
K.-H. Dostert ◽  
M. Hollerer ◽  
C. Stiehler ◽  
F. Calaza ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Pd Nanoparticles ◽  
Metal Nanoparticle ◽  
Model Systems ◽  
Nano Particles ◽  
Structure Changes ◽  
Hydrogenation Reactions ◽  
Composite Nature ◽  
Specific Reactions ◽  
Supported Pd

In order to design catalytic materials, we need to understand the essential causes for material properties resulting from its composite nature. In this paper we discuss two, at first sight, diverse aspects: (a) the effect of the oxide–metal interface on metal nanoparticle properties and (b) the consequences of metal particle modification after activation on the selectivity of hydrogenation reactions. However, these two aspects are intimately linked. The metal nanoparticle’s electronic structure changes at the interface as a catalyst is brought to different reaction temperatures due to morphological modifications in the metal and, as we will discuss, these changes in the chemistry lead to changes in the reaction path. As the morphology of the particle varies, facets of different orientations and sizes are exposed, which may lead to a change in the surface chemistry as well. We use two specific reactions to address these issues in some detail. To the best of our knowledge, the present paper reports the first observations of this kind for well-defined model systems. The changes in the electronic structure of Au nanoparticles due to their size and interaction with a supporting oxide are revealed as a function of temperature using CO2 activation as a probe. The presence of spectator species (oxopropyl), formed during an activation step of acrolein hydrogenation, strongly controls the selectivity of the reaction towards hydrogenation of the unsaturated CO bond vs. the CC bond on Pd(111) when compared with oxide-supported Pd nanoparticles.

Looking for the active hydrogen species in a 5 wt% Pt/C catalyst: a challenge for inelastic neutron scattering

2018 ◽  
Vol 208 ◽  
pp. 227-242 ◽  
Author(s):  
M. Carosso ◽  
A. Lazzarini ◽  
A. Piovano ◽  
R. Pellegrini ◽  
S. Morandi ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Active Hydrogen ◽  
Industrial Catalyst ◽  
Mean Diameter ◽  
Highly Dispersed ◽  
Hydrogenation Reactions

We looked at the active hydrogen species in a highly dispersed and very homogeneous 5 wt% Pt/C industrial catalyst (Pt particle mean diameter of 2.0 ± 0.5 nm) for hydrogenation reactions, by coupling H2 adsorption measurements with Inelastic Neutron Scattering (INS).

scholarly journals A facile and highly efficient transfer hydrogenation of ketones and aldehydes catalyzed by palladium nanoparticles supported on mesoporous graphitic carbon nitride

2019 ◽  
Vol 44 (1-2) ◽  
pp. 14-19
Author(s):  
Bilal Nişancı ◽  
Ziya Dağalan
Keyword(s):  
Carbon Nitride ◽  
Glass Tube ◽  
Pd Nanoparticles ◽  
Graphitic Carbon ◽  
Transfer Hydrogenation ◽  
Graphitic Carbon Nitride ◽  
Reusable Catalyst ◽  
Hydrogenation Reactions ◽  
High Yields ◽  
Benzaldehyde Derivatives

A novel transfer hydrogenation methodology for the reduction of ketones (14 examples) and benzaldehyde derivatives (12 examples) to the corresponding alcohols using Pd nanoparticles supported on mesoporous graphitic carbon nitride (mpg-C3N4/Pd) as a reusable catalyst and ammonia borane as a safe hydrogen source in an aqueous solution MeOH/H2O (v/v = 1/1) is described. The catalytic hydrogenation reactions were conducted in a commercially available high-pressure glass tube at room temperature, and the corresponding alcohols were obtained in high yields in 2–5 min. Moreover, the presented transfer hydrogenation protocol shows partial halogen selectivity with bromo-, fluoro-, and chloro-substituted carbonyl analogs. In addition, the present catalyst can be reused up to five times without losing its efficiency, and scaling-up the reaction enables α-methylbenzyl alcohol to be produced in 90% isolated yield.

scholarly journals Highly water-dispersible magnetite-supported Pd nanoparticles and single atoms as excellent catalysts for Suzuki and hydrogenation reactions

RSC Advances ◽  
2016 ◽  
Vol 6 (73) ◽  
pp. 68675-68684 ◽  
Author(s):  
A. Guarnizo ◽  
I. Angurell ◽  
G. Muller ◽  
J. Llorca ◽  
M. Seco ◽  
...  
Keyword(s):  
Magnetite Nanoparticles ◽  
Pd Nanoparticles ◽  
Catalytic Behavior ◽  
Water Dispersible ◽  
Single Atoms ◽  
Hydrogenation Reactions ◽  
Supported Pd

The linker dpa enables the deposition of palladium on magnetite nanoparticles that show excellent catalytic behavior in water or water/ethanol solvents.

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