ACS Publications. Most Trusted. Most Cited. Most Read
My Activity
CONTENT TYPES

Figure 1Loading Img
RETURN TO ISSUEPREVC: Chemical and Cata...C: Chemical and Catalytic Reactivity at InterfacesNEXT

Effect of Ligands and Their Removal on the Au Nanoparticle-Catalyzed Reduction of 4-Nitrophenol

Cite this: J. Phys. Chem. C 2022, 126, 32, 13705–13713
Publication Date (Web):August 3, 2022
https://doi.org/10.1021/acs.jpcc.2c03879
Copyright © 2022 American Chemical Society

    Article Views

    869

    Altmetric

    -

    Citations

    LEARN ABOUT THESE METRICS
    Other access options
    Supporting Info (1)»

    Abstract

    Abstract Image

    The catalytic activity of gold nanoparticles (Au NPs) is strongly affected by the organic ligands coating them, which afford colloidal stability and are most commonly attached during the synthesis of the Au NPs. However, different ligands also produce Au NPs of different sizes and morphologies, complicating the study of the impact of the ligands themselves. Alternatively, postsynthetic ligand exchange risks incomplete exchanges and a mixed ligand shell, as well as colloidal instability. Here, Au NPs are immobilized on glass supports to afford truly ligand-free, solvent-stable Au nanoislands (NIs). The catalytic activity of Au NIs, uncoated and coated with a variety of ligands, is evaluated for the catalytic reduction of 4-nitrophenol to 4-aminophenol, a common model reaction. The modification of stable, immobilized NIs ensures identical size and shape distributions across all cases and isolates the effect of ligands to reveal their absolute impact versus uncoated Au. All molecules are found to inhibit catalysis to varying degrees, with longer-chain molecules having a stronger influence. Ligands are partially removed by borohydride during the reaction, as confirmed by X-ray photoelectron spectroscopy measurements, leading to significantly less inhibition when the catalysts are reused. Kinetic analysis of the reaction for various ligand-coated catalysts shows that the reaction rate increases over time due to ligand removal, demonstrating the value of longer conversion studies versus the method of initial rates. These direct cross-class ligand comparisons, using the same NP core, provide valuable insights into complex NP–ligand–reactant interactions.

    Read this article

    To access this article, please review the available access options below.

    Get instant access

    Purchase Access

    Read this article for 48 hours. Check out below using your ACS ID or as a guest.

    Recommended

    Access through Your Institution

    You may have access to this article through your institution.

    Your institution does not have access to this content. You can change your affiliated institution below.

    Supporting Information

    ARTICLE SECTIONS
    Jump To

    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.jpcc.2c03879.

    • DLS measurements and concentration calculation of Au NPs; detailed fabrication procedure of Au NI slides; XRD characterization; XPS measurements; LSPR spectra of bare Au NI slides; full spectra from the catalytic reactions including controls; and TON calculation (PDF)

    Terms & Conditions

    Most electronic Supporting Information files are available without a subscription to ACS Web Editions. Such files may be downloaded by article for research use (if there is a public use license linked to the relevant article, that license may permit other uses). Permission may be obtained from ACS for other uses through requests via the RightsLink permission system: http://pubs.acs.org/page/copyright/permissions.html.

    Cited By

    This article is cited by 4 publications.

    1. Florian Schulz, Jonas Hühn, Marco Werner, Dominik Hühn, Julia Kvelstad, Ulrich Koert, Nicole Wutke, Markus Klapper, Michael Fröba, Vladimir Baulin, Wolfgang J. Parak. Local Environments Created by the Ligand Coating of Nanoparticles and Their Implications for Sensing and Surface Reactions. Accounts of Chemical Research 2023, 56 (17) , 2278-2285. https://doi.org/10.1021/acs.accounts.3c00139
    2. Nicholas Langer, Mason LeGrand, Ofer Kedem. Cationic Polymer Coating Increases the Catalytic Activity of Gold Nanoparticles toward Anionic Substrates. ACS Applied Materials & Interfaces 2023, 15 (24) , 29160-29169. https://doi.org/10.1021/acsami.3c04087
    3. Salma S. Syed, Liyamol Jacob, G. Bharath, Mohammed Abu Haija, Anupama Kaushik, Fawzi Banat. Rapid biosynthesis and characterization of metallic gold nanoparticles by olea europea and their potential application in photoelectrocatalytic reduction of 4-nitrophenol. Environmental Research 2023, 222 , 115280. https://doi.org/10.1016/j.envres.2023.115280
    4. Rui Hu, Yonghui Zhao, Peiling Yuan, Xiang Meng, Xiaoli Yang. Arc-integration of graphite-coated plasmonic satellite-magnetic core nanoassembly: Efficient tailoring of nanostructure/functionality for catalysis of pollutants. Applied Surface Science 2023, 612 , 155852. https://doi.org/10.1016/j.apsusc.2022.155852

    Pair your accounts.

    Export articles to Mendeley

    Get article recommendations from ACS based on references in your Mendeley library.

    Pair your accounts.

    Export articles to Mendeley

    Get article recommendations from ACS based on references in your Mendeley library.

    You’ve supercharged your research process with ACS and Mendeley!

    STEP 1:
    Click to create an ACS ID

    Please note: If you switch to a different device, you may be asked to login again with only your ACS ID.

    Please note: If you switch to a different device, you may be asked to login again with only your ACS ID.

    Please note: If you switch to a different device, you may be asked to login again with only your ACS ID.

    MENDELEY PAIRING EXPIRED
    Your Mendeley pairing has expired. Please reconnect