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Supported palladium nanoparticles on hybrid mesoporous silica: Structure/activity-relationship in the aerobic alcohol oxidation using supercritical carbon dioxide

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Abstract.
The preparation, characterization, and catalytic properties of Pd nanoparticles supported on mesoporous
organic–inorganic hybrid materials are described for continuous-flow aerobic oxidation of alcohols using
supercritical carbon dioxide (scCO2) as a mobile phase. The nanoparticles were generated “bottom-up”
from molecular precursors that were precoordinated to the support through suitable anchor units. The
most active material allows high single-pass conversions in scCO2 at temperatures as low as 60 ◦C. This
high activity may be associated with the presence of small primary crystallites (approx. 2 nm) that
conglomerate to ensembles about 25 nm in size, leading to a larger number of high-indexed planes
in small volume units. These findings may provide useful guidelines for further catalyst design on the
nanoscale for green oxidation methods.

Keywords:
Palladium
Nanoparticles
Supercritical carbon dioxide
Alcohol oxidation
Mesoporous support
Hybrid materials

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Informasi Detail

Judul Seri

Journal of Catalysis

No. Panggil

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Penerbit

London : Elsevier Inc.., 2008

Deskripsi Fisik

Journal of Catalysis 258 (2008) 315–323

Bahasa

English

ISBN/ISSN

00219517

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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