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Related Experiment Video

Updated: Jun 30, 2026

Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles
11:54

Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles

Published on: June 25, 2018

Selective hydrogenation by Pd nanoparticles embedded in polyelectrolyte multilayers.

Srividhya Kidambi1, Jinhua Dai, Jin Li

  • 1Department of Chemistry, Michigan Sate University, East Lansing, Michigan 48824, USA.

Journal of the American Chemical Society
|March 5, 2004
PubMed
Summary

This study demonstrates how polyelectrolyte films containing palladium nanoparticles enhance catalytic hydrogenation selectivity. These films control reactant access, leading to faster reactions and reduced byproducts.

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Area of Science:

  • Materials Science
  • Catalysis
  • Nanotechnology

Background:

  • Developing selective catalysts is crucial for efficient chemical synthesis.
  • Nanoparticle catalysts offer high surface area but often suffer from aggregation and lack of selectivity.
  • Polyelectrolyte multilayers provide a versatile platform for catalyst immobilization and control.

Purpose of the Study:

  • To create palladium nanoparticles within polyelectrolyte films for enhanced catalytic hydrogenation.
  • To investigate the role of polyelectrolyte structure in controlling catalyst selectivity and activity.
  • To compare the performance of the encapsulated catalyst with commercial palladium catalysts.

Main Methods:

  • Alternating adsorption of poly(acrylic acid) and polyethylenimine-Pd(II) complex on alumina.

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Photodeposition of Pd onto Colloidal Au Nanorods by Surface Plasmon Excitation
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Preparation of Silver-Palladium Alloyed Nanoparticles for Plasmonic Catalysis under Visible-Light Illumination
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Preparation of Silver-Palladium Alloyed Nanoparticles for Plasmonic Catalysis under Visible-Light Illumination

Published on: August 18, 2020

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Last Updated: Jun 30, 2026

Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles
11:54

Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles

Published on: June 25, 2018

Photodeposition of Pd onto Colloidal Au Nanorods by Surface Plasmon Excitation
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Photodeposition of Pd onto Colloidal Au Nanorods by Surface Plasmon Excitation

Published on: August 15, 2019

Preparation of Silver-Palladium Alloyed Nanoparticles for Plasmonic Catalysis under Visible-Light Illumination
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Preparation of Silver-Palladium Alloyed Nanoparticles for Plasmonic Catalysis under Visible-Light Illumination

Published on: August 18, 2020

  • In-situ reduction of Pd(II) to Pd(0) nanoparticles using sodium borohydride.
  • Fabrication of multilayer polyelectrolyte films embedding the palladium nanoparticles.
  • Testing catalytic activity and selectivity in the hydrogenation of alpha-substituted unsaturated alcohols.

    • Main Results:

    • Palladium nanoparticles were successfully embedded in multilayer polyelectrolyte films.
    • The polyelectrolyte films limited nanoparticle aggregation and restricted substrate access, enhancing selectivity.
    • Hydrogenation of allyl alcohol was up to 24-fold faster than other substrates.
    • The system suppressed unwanted substrate isomerization compared to commercial palladium catalysts.
    • Selective diffusion through the polyelectrolyte membranes indicated a diffusion-limited mechanism.

    Conclusions:

    • Polyelectrolyte-encapsulated palladium nanoparticles offer tunable selectivity in hydrogenation reactions.
    • The diffusion of substrates through the polyelectrolyte matrix is key to achieving high selectivity.
    • This approach provides a versatile platform for designing advanced catalytic systems.