Nanosized metallic particles embedded in silica and carbon aerogels as catalysts in the Mizoroki–Heck coupling reaction

Martı́nez, Sandra; Vallribera, Adelina; Cotet, C.; Popovici, Mihaela; Martín, Lorena Pingarrón; Roig, Anna; Moreno‐Mañas, Marcial; Molins, Elı́es

doi:10.1039/b506784g

Cited by 63 publications

(31 citation statements)

References 34 publications

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“…Supercritical conditions were also used for the preparation of new materials applicable as catalysts in Mizoroki-Heck chemistry. Aerogel nanocomposites doped with metallic palladium were prepared from silica wet gels or by sol-gel polymerization, followed by ethanol or CO 2 supercritical drying [125].…”

Section: As a Ligand Andmentioning

confidence: 99%

Mizoroki–Heck Reactions: Modern Solvent Systems and Reaction Techniques

Bonrath¹,

Létinois²,

Netscher³

et al. 2009

The Mizoroki–Heck Reaction

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Section: As a Ligand Andmentioning

confidence: 99%

Mizoroki–Heck Reactions: Modern Solvent Systems and Reaction Techniques

Bonrath¹,

Létinois²,

Netscher³

et al. 2009

The Mizoroki–Heck Reaction

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“…Nanosized Ni metallic particles encapsulated in silica and carbon aerogels were presented by Martínez et al [91] The attractive advantage of the proposed method is that no particular reduction step is required to obtain metallic particles of Ni. However, the samples tested towards CÀC coupling reactions did not show appreciable catalytic activity.…”

Section: Nickelmentioning

confidence: 99%

Embedded Phases: A Way to Active and Stable Catalysts

et al. 2010

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Industrial catalysts are typically made of nanosized metal particles, carried by a solid support. The extremely small size of the particles maximizes the surface area exposed to the reactant, leading to higher reactivity. Moreover, the higher the number of metal atoms in contact with the support, the better the catalyst performance. In addition, peculiar properties have been observed for some metal/metal oxide particles of critical sizes. However, thermal stability of these nanostructures is limited by their size; smaller the particle size, the lower the thermal stability. The ability to fabricate and control the structure of nanoparticles allows to influence the resulting properties and, ultimately, to design stable catalysts with the desired characteristics. Tuning particle sizes provides the possibility to modulate the catalytic activity. Unique and unexpected properties have been observed by confining/embedding metal nanoparticles in inorganic channels or cavities, which indeed offers new opportunities for the design of advanced catalytic sytems. Innovation in catalyst design is a powerful tool in realizing the goals of more green, efficient and sustainable industrial processes. The present Review focuses on the catalytic performance of noble metal‐ and non precious metal‐based embedded catalysts with respect to traditional impregnated systems. Emphasis is dedicated to the improved thermal stability of these nanostructures compared to conventional systems.

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“…105,106 The Ni nanoparticles in silica aerogels were prepared in multisteps. First, the sol-gel process was used to synthesize silica gel.…”

Section: Nanoparticles Composed Of Metals Other Than Pd For the Heck mentioning

confidence: 99%