IndiumV3, Main, Repository, bibRecord, 000164

Design of novel indium oxide supported gold nanocatalysts and their application in homocoupling of arylboronic acids

Identifieur interne : 000164 ( Main/Repository ); précédent : 000163; suivant : 000165

Design of novel indium oxide supported gold nanocatalysts and their application in homocoupling of arylboronic acids

Auteurs : RBID : Pascal:14-0098262

Descripteurs français

Pascal (Inist)
- Oxyde d'indium, Catalyseur sur support, Or, Acide, Nanoparticule, Electrolyse, Catalyse hétérogène.
Wicri :
- concept : Or, Acide.

English descriptors

KwdEn :
- Acids, Electrolysis, Gold, Heterogeneous catalysis, Indium oxide, Nanoparticle, Supported catalyst.

Abstract

Gold (Au) nanoparticles stabilized on metal oxide supports offer superior catalytic activity and recyclability in organic catalysis. We report for the first time synthesis of indium oxide stabilized gold (Au@In₂O₃) nanocatalysts using an electrochemical procedure and their application in homocoupling of arylboronic acids. In₂O₃ nanoparticles prepared via sol-gel process are subjected to sacrificial anode electrolysis (SAE) under inert condition for electrodeposition of nano Au on In₂O₃. Thus Au@In₂O₃ nanoparticles obtained are thermally annealed at high temperature to partially oxidize Au and to remove any surfactants. XPS results show the existence of both elemental (nano Au⁰) and cationic (Au³⁺) species in Au@In₂O₃ nanocatalysts, while SEM images confirm the presence of nanoscale Au (<10nm) particles on In₂O₃ surface. Au@In₂O₃ nanocatalysts are tested for arylboronic acids homocoupling under different conditions and it is found that they are highly active in organic medium with K₂CO₃ base and demonstrate excellent conversion (>97%) and selectivity (>98%). The catalyst recyclability and performance towards differently substituted arylboronic acids is also studied and a plausible mechanism of action is proposed.

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Pascal:14-0098262

Le document en format XML

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<author><name sortKey="Afzal, Adeel" uniqKey="Afzal A">Adeel Afzal</name>
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<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Affiliated Colleges at Hafr Al-Batin, King Fahd University of Petroleum and Minerals, P.O. Box 1803</s1>
<s2>Hafr Al-Batin, 31991</s2>
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<country>Arabie saoudite</country>
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<author><name sortKey="Di Franco, Cinzia" uniqKey="Di Franco C">Cinzia Di Franco</name>
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<author><name sortKey="Cioffi, Nicola" uniqKey="Cioffi N">Nicola Cioffi</name>
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<author><name sortKey="Nacci, Angelo" uniqKey="Nacci A">Angelo Nacci</name>
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<author><name sortKey="Cotugno, Pietro" uniqKey="Cotugno P">Pietro Cotugno</name>
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<s2>Bari, 70126</s2>
<s3>ITA</s3>
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</author>
<author><name sortKey="Torsi, Luisa" uniqKey="Torsi L">Luisa Torsi</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Dipartimento di Chimica, Università degli Studi di Bari "Aldo Moro", via Orabona 4.</s1>
<s2>Bari, 70126</s2>
<s3>ITA</s3>
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<seriesStmt><idno type="ISSN">1381-1169</idno>
<title level="j" type="abbreviated">J. mol. catal., A Chem.</title>
<title level="j" type="main">Journal of molecular catalysis. A, Chemical</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acids</term>
<term>Electrolysis</term>
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<term>Heterogeneous catalysis</term>
<term>Indium oxide</term>
<term>Nanoparticle</term>
<term>Supported catalyst</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Oxyde d'indium</term>
<term>Catalyseur sur support</term>
<term>Or</term>
<term>Acide</term>
<term>Nanoparticule</term>
<term>Electrolyse</term>
<term>Catalyse hétérogène</term>
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<keywords scheme="Wicri" type="concept" xml:lang="fr"><term>Or</term>
<term>Acide</term>
</keywords>
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<front><div type="abstract" xml:lang="en">Gold (Au) nanoparticles stabilized on metal oxide supports offer superior catalytic activity and recyclability in organic catalysis. We report for the first time synthesis of indium oxide stabilized gold (Au@In<sub>2</sub>
O<sub>3</sub>
) nanocatalysts using an electrochemical procedure and their application in homocoupling of arylboronic acids. In<sub>2</sub>
O<sub>3</sub>
 nanoparticles prepared via sol-gel process are subjected to sacrificial anode electrolysis (SAE) under inert condition for electrodeposition of nano Au on In<sub>2</sub>
O<sub>3</sub>
. Thus Au@In<sub>2</sub>
O<sub>3</sub>
 nanoparticles obtained are thermally annealed at high temperature to partially oxidize Au and to remove any surfactants. XPS results show the existence of both elemental (nano Au<sup>0</sup>
) and cationic (Au<sup>3+</sup>
) species in Au@In<sub>2</sub>
O<sub>3</sub>
 nanocatalysts, while SEM images confirm the presence of nanoscale Au (<10nm) particles on In<sub>2</sub>
O<sub>3</sub>
 surface. Au@In<sub>2</sub>
O<sub>3</sub>
 nanocatalysts are tested for arylboronic acids homocoupling under different conditions and it is found that they are highly active in organic medium with K<sub>2</sub>
CO<sub>3</sub>
 base and demonstrate excellent conversion (>97%) and selectivity (>98%). The catalyst recyclability and performance towards differently substituted arylboronic acids is also studied and a plausible mechanism of action is proposed.</div>
</front>
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<fA03 i2="1"><s0>J. mol. catal., A Chem.</s0>
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<fA08 i1="01" i2="1" l="ENG"><s1>Design of novel indium oxide supported gold nanocatalysts and their application in homocoupling of arylboronic acids</s1>
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<fA11 i1="01" i2="1"><s1>MONOPOLI (Antonio)</s1>
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<fA14 i1="04"><s1>TIRES Centro Interdipartimentale di Ricerca di Eccellenza, Università degli Studi di Bari "Aldo Moro", via Orabona 4</s1>
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<fA20><s1>101-107</s1>
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<fC01 i1="01" l="ENG"><s0>Gold (Au) nanoparticles stabilized on metal oxide supports offer superior catalytic activity and recyclability in organic catalysis. We report for the first time synthesis of indium oxide stabilized gold (Au@In<sub>2</sub>
O<sub>3</sub>
) nanocatalysts using an electrochemical procedure and their application in homocoupling of arylboronic acids. In<sub>2</sub>
O<sub>3</sub>
 nanoparticles prepared via sol-gel process are subjected to sacrificial anode electrolysis (SAE) under inert condition for electrodeposition of nano Au on In<sub>2</sub>
O<sub>3</sub>
. Thus Au@In<sub>2</sub>
O<sub>3</sub>
 nanoparticles obtained are thermally annealed at high temperature to partially oxidize Au and to remove any surfactants. XPS results show the existence of both elemental (nano Au<sup>0</sup>
) and cationic (Au<sup>3+</sup>
) species in Au@In<sub>2</sub>
O<sub>3</sub>
 nanocatalysts, while SEM images confirm the presence of nanoscale Au (<10nm) particles on In<sub>2</sub>
O<sub>3</sub>
 surface. Au@In<sub>2</sub>
O<sub>3</sub>
 nanocatalysts are tested for arylboronic acids homocoupling under different conditions and it is found that they are highly active in organic medium with K<sub>2</sub>
CO<sub>3</sub>
 base and demonstrate excellent conversion (>97%) and selectivity (>98%). The catalyst recyclability and performance towards differently substituted arylboronic acids is also studied and a plausible mechanism of action is proposed.</s0>
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<s5>03</s5>
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<fN44 i1="01"><s1>OTO</s1>
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Design of novel indium oxide supported gold nanocatalysts and their application in homocoupling of arylboronic acids

Design of novel indium oxide supported gold nanocatalysts and their application in homocoupling of arylboronic acids

Descripteurs français

English descriptors

Abstract

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Links to Exploration step

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