Formation and catalytic activity of Pd nanoparticles on silica in supercritical CO2

Shohreh Saffarzadeh-Matin; Francesca M. Kerton; Jason M. Lynam; Christopher M. Rayner

doi:10.1039/b607118j

Formation and catalytic activity of Pd nanoparticles on silica in supercritical CO2

Shohreh Saffarzadeh-Matin, Francesca M. Kerton, Jason M. Lynam, Christopher M. Rayner

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

Metal complexes of polydimethylsiloxane-derived ligands can be adsorbed onto silica and subsequently reduced in-situ in supercritical CO2 (scCO(2)) to generate metal nanoparticles. Pd nanoparticles on silica, generated during C - C coupling reactions in scCO(2), can be recycled several times without any loss in activity. Focusing on Heck and Suzuki coupling reactions, the products showed no contamination of the organic products with Pd using quantitative ICP emission spectroscopy. The use of scCO(2) prevents the desorption of the Pd nanoparticles from their support. Build-up of ammonium salts as by-products in these coupling reactions leads to reduced activity for these heterogeneous catalysts after four runs.

Original language	English
Pages (from-to)	965-971
Number of pages	7
Journal	Green Chemistry
Volume	8
Issue number	11
DOIs	https://doi.org/10.1039/b607118j
Publication status	Published - 2006

Keywords

CROSS-COUPLING REACTION
CARBON-DIOXIDE
PALLADIUM NANOPARTICLES
RECYCLABLE CATALYST
MIZOROKI-HECK
SUZUKI
HYDROGENATION
WATER
ADSORPTION
PARTICLES

Access to Document

10.1039/b607118j

Cite this

@article{590ad131baed4e20a7942cd34627b5c3,

title = "Formation and catalytic activity of Pd nanoparticles on silica in supercritical CO2",

abstract = "Metal complexes of polydimethylsiloxane-derived ligands can be adsorbed onto silica and subsequently reduced in-situ in supercritical CO2 (scCO(2)) to generate metal nanoparticles. Pd nanoparticles on silica, generated during C - C coupling reactions in scCO(2), can be recycled several times without any loss in activity. Focusing on Heck and Suzuki coupling reactions, the products showed no contamination of the organic products with Pd using quantitative ICP emission spectroscopy. The use of scCO(2) prevents the desorption of the Pd nanoparticles from their support. Build-up of ammonium salts as by-products in these coupling reactions leads to reduced activity for these heterogeneous catalysts after four runs.",

keywords = "CROSS-COUPLING REACTION, CARBON-DIOXIDE, PALLADIUM NANOPARTICLES, RECYCLABLE CATALYST, MIZOROKI-HECK, SUZUKI, HYDROGENATION, WATER, ADSORPTION, PARTICLES",

author = "Shohreh Saffarzadeh-Matin and Kerton, {Francesca M.} and Lynam, {Jason M.} and Rayner, {Christopher M.}",

year = "2006",

doi = "10.1039/b607118j",

language = "English",

volume = "8",

pages = "965--971",

journal = "Green Chemistry",

issn = "1463-9270",

publisher = "The Royal Society of Chemistry",

number = "11",

}

TY - JOUR

T1 - Formation and catalytic activity of Pd nanoparticles on silica in supercritical CO2

AU - Saffarzadeh-Matin, Shohreh

AU - Kerton, Francesca M.

AU - Lynam, Jason M.

AU - Rayner, Christopher M.

PY - 2006

Y1 - 2006

N2 - Metal complexes of polydimethylsiloxane-derived ligands can be adsorbed onto silica and subsequently reduced in-situ in supercritical CO2 (scCO(2)) to generate metal nanoparticles. Pd nanoparticles on silica, generated during C - C coupling reactions in scCO(2), can be recycled several times without any loss in activity. Focusing on Heck and Suzuki coupling reactions, the products showed no contamination of the organic products with Pd using quantitative ICP emission spectroscopy. The use of scCO(2) prevents the desorption of the Pd nanoparticles from their support. Build-up of ammonium salts as by-products in these coupling reactions leads to reduced activity for these heterogeneous catalysts after four runs.

AB - Metal complexes of polydimethylsiloxane-derived ligands can be adsorbed onto silica and subsequently reduced in-situ in supercritical CO2 (scCO(2)) to generate metal nanoparticles. Pd nanoparticles on silica, generated during C - C coupling reactions in scCO(2), can be recycled several times without any loss in activity. Focusing on Heck and Suzuki coupling reactions, the products showed no contamination of the organic products with Pd using quantitative ICP emission spectroscopy. The use of scCO(2) prevents the desorption of the Pd nanoparticles from their support. Build-up of ammonium salts as by-products in these coupling reactions leads to reduced activity for these heterogeneous catalysts after four runs.

KW - CROSS-COUPLING REACTION

KW - CARBON-DIOXIDE

KW - PALLADIUM NANOPARTICLES

KW - RECYCLABLE CATALYST

KW - MIZOROKI-HECK

KW - SUZUKI

KW - HYDROGENATION

KW - WATER

KW - ADSORPTION

KW - PARTICLES

U2 - 10.1039/b607118j

DO - 10.1039/b607118j

M3 - Article

SN - 1463-9270

VL - 8

SP - 965

EP - 971

JO - Green Chemistry

JF - Green Chemistry

IS - 11

ER -