Size-Effect of Pd-(Poly(<i>N</i>-vinyl-2-pyrrolidone)) Nanocatalysts on Selective Hydrogenation of Alkynols with Different Alkyl Chains

Yarulin, Artur; Yuranov, Igor; Cárdenas‐Lizana, Fernando; Abdulkin, Pavel; Kiwi‐Minsker, Lioubov

doi:10.1021/jp402258s

Cited by 35 publications

(34 citation statements)

References 61 publications

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“…Pd, Ni, Pt, Ag, Rh, Fe). 8 Among these metals, those with high hydrogen acti-vation capacity such as Ni or Pt frequently present severe selectivity issues due to their strong over-hydrogenation activity. In contrast, high selectivities to the alkene were reported for metals with low reactivity towards H 2 such as Ag or Au, but these metals are hardly competitive in terms of activity.…”

Section: Introductionmentioning

confidence: 99%

Advances in the preparation of highly selective nanocatalysts for the semi-hydrogenation of alkynes using colloidal approaches

et al. 2017

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In the last decade, the semi-hydrogenation of alkynes has experienced significant advances in terms of fine control of alkene selectivity and prevention of the over-hydrogenation reaction. Such advances have been possible to a large extent through the progress in colloidal methods for the preparation of metallic nanoparticles. The present review describes the contributions in the field of the selective hydrogenation of alkynes involving the utilization of colloidal methodologies. These approaches permit the fine modulation of several parameters affecting the catalytic performance of the active phase such as the particle size, the bulk and the surface structure and composition. For the transformation of liquid substrates, the nature of the stabilizers, the reducing agents and the metal precursors employed for the synthesis of the catalysts can be tuned to enhance the alkene selectivity. In contrast, in catalytic transformations of gaseous substrates, the presence of adsorbed species at the metal surface usually gives detrimental results while the interplay between the support and the active phase appears to be a more convincing alternative for catalyst tuning.

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Section: Introductionmentioning

confidence: 99%

Advances in the preparation of highly selective nanocatalysts for the semi-hydrogenation of alkynes using colloidal approaches

et al. 2017

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“…Moreover, surface modifiers that are organic molecules decompose at high reaction temperatures. Although methods for controlling the morphology of fine particles such as metals [1,8,9] and metal-oxide inorganic [2,4,10] compounds have been studied widely, there have been few such studies of metal nitride compounds [11]. This study concerned control of the morphology of metal nitride compounds.…”

Section: Introductionmentioning

confidence: 99%

Influence of Fatty Acid Alkyl Chain Length on Anisotropy of Copper Nitride Nano-Crystallites

Nakamura

2017

Inorganics

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My group developed a simple method to prepare copper nitride fine particles from copper carboxylate in a solvent of long-chain alcohols without the use of high temperatures or high pressures. By selecting copper acetate or copper decanoate as the copper source, my group demonstrated that the morphology of the copper nitride fine particles varied between cubic and plate-like, respectively. Although a hypothesis was proposed to explain the influence of the length of the alkyl chain on the copper decanoate, it is uncertain how much the chain length influences the shape of the fine particles.In this work, I demonstrated the effect of the length of the alkyl chain on particle shape by preparing fine particles from a series of copper sources with different alky chain lengths and characterizing the particles with x-ray diffractometry (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The main findings were as follows: (1) the fine particles were plate-like when the alkyl chain length exceeded 5; (2) the aspect ratio of the plate-like particles increased as the alkyl chain length increased; and (3) growth of the (110) and (111) planes of the copper nitride crystal were selectively inhibited.

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“…Some previous researchers have made great efforts to explain that catalysts with well-defined shapes of metal nanocrystals supported with exposed distinct crystal facets have different performances [9][10][11]. However, the Pd catalysts currently used in the aforementioned reactions are mainly based on polycrystalline nanoparticles of Pd with poorly controlled sizes and shapes [12,13].…”

Section: Introductionmentioning

confidence: 99%

Novel Pd Nanocubes Supported on Activated Carbon as a Catalyst for the Suzuki-Miyaura Coupling Reaction

Shi¹,

Bai²

2015

TOMSJ

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Palladium nanocubes with diameters of 6~10 nm have been successfully synthesized by a simple reduction route with the assistance of PVP as stabilizing agent and KBr as a capping agent. The palladium nanocubes supported on activated carbon (Pd/C) were prepared by a physical absorption method. The-prepared Pd/C catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy technology (TEM), thermogravimetric analyzer (TGA) and X-ray photoelectron spectroscopy (XPS). The results demonstrated that the palladium nano particles with the facecentered-cubic structure were uniformly supported on the activated carbon. It was shown from experimental results that the product yield for the Suzuki-Miyaura reaction between aryl bromides with aryl boronic acid attains more than 90% and has no significant loss of catalytic activity after five reaction cycles.

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Size-Effect of Pd-(Poly(N-vinyl-2-pyrrolidone)) Nanocatalysts on Selective Hydrogenation of Alkynols with Different Alkyl Chains

Cited by 35 publications

References 61 publications

Advances in the preparation of highly selective nanocatalysts for the semi-hydrogenation of alkynes using colloidal approaches

Advances in the preparation of highly selective nanocatalysts for the semi-hydrogenation of alkynes using colloidal approaches

Influence of Fatty Acid Alkyl Chain Length on Anisotropy of Copper Nitride Nano-Crystallites

Novel Pd Nanocubes Supported on Activated Carbon as a Catalyst for the Suzuki-Miyaura Coupling Reaction

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