Alloying of AuNPs with palladium: A promising tool for tuning of selectivity for epoxide in oxidation of styrene using molecular oxygen

[Display omitted] •Epoxidation of styrene on gold and Au-Pd alloy nanoparticles using molecular oxygen.•Lowest catalyst quantity 0.038mmol%.•98% conversion with 75% selectivity for epoxide.•A green protocol with general applicability. Present investigation, deals with synthesis of gold and gold pall...

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Bibliographic Details
Published in:Applied catalysis. A, General Vol. 546; pp. 136 - 148
Main Authors: Sharma, Anuj S., Kaur, Harjinder
Format: Journal Article
Language:English
Published: Amsterdam Elsevier B.V 25.09.2017
Elsevier Science SA
Subjects:
Agrochemicals
Alkenes
Alloying
AuNPs
Catalysis
Catalysts
Catalytic activity
Chemical synthesis
Cosmetics
Epoxidation
Epoxy resins
Gold
Heterogeneous catalyst
Molecular oxygen
Nanoparticles
Oxidation
Oxidation of styrene
Oxygen
Palladium
Perfumes
Plasticizers
Resin supported Au-Pd NPs
Selectivity
Studies
Styrene
Textiles
Epoxidation
Heterogeneous catalyst
Molecular oxygen
Oxidation of styrene
Resin supported Au-Pd NPs
AuNPs
ISSN:0926-860X, 1873-3875
Online Access:Get full text
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Summary:[Display omitted] •Epoxidation of styrene on gold and Au-Pd alloy nanoparticles using molecular oxygen.•Lowest catalyst quantity 0.038mmol%.•98% conversion with 75% selectivity for epoxide.•A green protocol with general applicability. Present investigation, deals with synthesis of gold and gold palladium alloy nanoparticles and their application to epoxidation of styrene using molecular oxygen. Synthesized AuNPs@ Resin and bimetallic Au-Pd NPs@ Resin of average size <5nm were analyzed by various techniques such as X-ray diffraction (XRD), SEM-EDX, TEM-EDS, inductively coupled plasma atomic emission spectroscopy (ICP-AES) and X-ray photoelectron spectroscopy (XPS). Results showed that alloying of Au with Pd enhanced selectivity of the catalyst towards epoxidation. Au/Pd molar ratio (1/1) provided 98% conversion of styrene with 75% selectivity towards styrene oxide with a TOF of 0.181 (s−1) in terms of gold present in catalyst. The catalyst is promising candidate for industrial application as it showed remarkable stability, reusability and general applicability.
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ISSN:0926-860X
1873-3875
DOI:10.1016/j.apcata.2017.08.014