fulltext.study @t Gmail

Preparation of nanostructured Pd particles using a seeding synthesis approach—Application to the selective hydrogenation of buta-1,3-diene

Paper ID Volume ID Publish Year Pages File Format Full-Text
44231 46010 2007 12 PDF Available
Title
Preparation of nanostructured Pd particles using a seeding synthesis approach—Application to the selective hydrogenation of buta-1,3-diene
Abstract

Well-defined nanostructured Pd particles were successfully synthesized in aqueous solution using a seeding-mediated approach with cetyltrimethylammonium bromide (CTAB) acting as both capping and structure-directing agent. Four well-defined nanoobjects were obtained: nanocubes, nanotetrahedra, nanopolyhedra, and nanorods. The anisotropic Pd nanorods exposed preferentially {1 0 0} facets due to the stabilization effect of CTAB.After deposition onto α-Al2O3, these nanostructured Pd particles were tested in the selective hydrogenation of buta-1,3-diene at 298 K under 20 bars of H2. Compared to an isotropic Pd catalyst, anisotropic Pd catalysts were found highly selective for the hydrogenation of buta-1,3-diene into butenes without further hydrogenation into butane. Moreover, on the nanostructured catalysts, further hydrogenation of but-1-ene into butane is reduced while but-2-enes were hardly converted. Finally, an unusual high level of cis but-2-ene isomer was observed. These results suggest a modification of the mechanism usually admitted for Pd catalysts when a well-defined nanomorphology is achieved.

Graphical abstractWell-defined nanostructured Pd particles were successfully synthesized in aqueous solution using a seeding-mediated approach. Four well-defined nanoobjects were obtained: nanocubes, nanoprisms (or nanotetrahedra), nanopolyhedra, and nanorods. After deposition onto α-Al2O3, nanostructured Pd particles were found highly selective for the hydrogenation of buta-1,3-diene into butenes without further hydrogenation into butane.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Palladium; Nanorods; Crystalline growth; Hydrogenation; Buta-1,3-diene
First Page Preview
Preparation of nanostructured Pd particles using a seeding synthesis approach—Application to the selective hydrogenation of buta-1,3-diene
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 327, Issue 1, 31 July 2007, Pages 32–43
Authors
, , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us