skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Synthesis and Catalytic Properties of Au Pd Nanoflowers

Abstract

Reduction of Pd ions by hydroquinone in the presence of gold nanoparticles and polyvinylpyrrolidone resulted in the formation of nanoflowers with a Au core and Pd petals. Addition of HCl to the synthesis halted the reduction by hydroquinone and enabled the acquisition of snapshots of the nanoflowers at different stages of growth. TEM images of the reaction after 10 s show that the nanoflower morphology resulted from the homogeneous nucleation of Pd clusters in solution and their subsequent attachment to gold seeds coated with a thin (0.8 0.1 nm) shell of Pd. UV visible spectra also indicate Pd clusters formed in the early stages of the reaction and disappeared as the nanoflowers grew. The speed at which this reaction can be halted is useful not only for producing a variety of bimetallic nanostructures with precisely controlled dimensions and morphologies but also for understanding the growth mechanism of these structures. The ability of the AuPd core shell structure to catalyze the Suzuki coupling reaction of iodobenzene to phenylboronic acid was probed and compared against the activity of Pd nanocubes and thin-shelled AuPd core shell nanoparticles. The results of this study suggest that Suzuki coupling was not affected by the surface structuremore » or subsurface composition of the nanoparticles, but instead was primarily catalyzed by molecular Pd species that leached from the nanostructures.« less

Authors:
 [1];  [2];  [3];  [3];  [2]
  1. Department of Chemistry, Duke University
  2. Duke University
  3. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1049838
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
ACS Nano
Additional Journal Information:
Journal Volume: 5; Journal Issue: 8; Journal ID: ISSN 1936-0851
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; DIMENSIONS; GOLD; MORPHOLOGY; NANOSTRUCTURES; NUCLEATION; PVP; SEEDS; SYNTHESIS; VELOCITY; VISIBLE SPECTRA; gold; palladium; nanostructures; nanoflowers; nanoclusters

Citation Formats

Xu, Jianguang, Wilson, Adria, Howe, Jane Y, Chi, Miaofang, and Wiley, Benjamin J. Synthesis and Catalytic Properties of Au Pd Nanoflowers. United States: N. p., 2011. Web. doi:10.1021/nn201161m.
Xu, Jianguang, Wilson, Adria, Howe, Jane Y, Chi, Miaofang, & Wiley, Benjamin J. Synthesis and Catalytic Properties of Au Pd Nanoflowers. United States. https://doi.org/10.1021/nn201161m
Xu, Jianguang, Wilson, Adria, Howe, Jane Y, Chi, Miaofang, and Wiley, Benjamin J. 2011. "Synthesis and Catalytic Properties of Au Pd Nanoflowers". United States. https://doi.org/10.1021/nn201161m.
@article{osti_1049838,
title = {Synthesis and Catalytic Properties of Au Pd Nanoflowers},
author = {Xu, Jianguang and Wilson, Adria and Howe, Jane Y and Chi, Miaofang and Wiley, Benjamin J},
abstractNote = {Reduction of Pd ions by hydroquinone in the presence of gold nanoparticles and polyvinylpyrrolidone resulted in the formation of nanoflowers with a Au core and Pd petals. Addition of HCl to the synthesis halted the reduction by hydroquinone and enabled the acquisition of snapshots of the nanoflowers at different stages of growth. TEM images of the reaction after 10 s show that the nanoflower morphology resulted from the homogeneous nucleation of Pd clusters in solution and their subsequent attachment to gold seeds coated with a thin (0.8 0.1 nm) shell of Pd. UV visible spectra also indicate Pd clusters formed in the early stages of the reaction and disappeared as the nanoflowers grew. The speed at which this reaction can be halted is useful not only for producing a variety of bimetallic nanostructures with precisely controlled dimensions and morphologies but also for understanding the growth mechanism of these structures. The ability of the AuPd core shell structure to catalyze the Suzuki coupling reaction of iodobenzene to phenylboronic acid was probed and compared against the activity of Pd nanocubes and thin-shelled AuPd core shell nanoparticles. The results of this study suggest that Suzuki coupling was not affected by the surface structure or subsurface composition of the nanoparticles, but instead was primarily catalyzed by molecular Pd species that leached from the nanostructures.},
doi = {10.1021/nn201161m},
url = {https://www.osti.gov/biblio/1049838}, journal = {ACS Nano},
issn = {1936-0851},
number = 8,
volume = 5,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2011},
month = {Sat Jan 01 00:00:00 EST 2011}
}