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

Atom-Precise Ag Clusters as Precursors for Selective Bimetallic AgPd Heterogeneous Catalysts

  • Kazeem O. Sulaiman
    Kazeem O. Sulaiman
    Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
  • Andrew Bueckert
    Andrew Bueckert
    Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
  • Ahmed Abdellah
    Ahmed Abdellah
    Department of Chemical Engineering, McMaster University, 1280 Main St W, Hamilton, Ontario L8S 4L7, Canada
  • Sudheesh Kumar Veeranmaril
    Sudheesh Kumar Veeranmaril
    Department of Chemical Engineering, McMaster University, 1280 Main St W, Hamilton, Ontario L8S 4L7, Canada
  • Drew C. Higgins
    Drew C. Higgins
    Department of Chemical Engineering, McMaster University, 1280 Main St W, Hamilton, Ontario L8S 4L7, Canada
  • , and 
  • Robert W. J. Scott*
    Robert W. J. Scott
    Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
    *E-mail: [email protected]. Phone: 1-306-966-2017.
Cite this: J. Phys. Chem. C 2022, 126, 38, 16117–16126
Publication Date (Web):September 19, 2022
https://doi.org/10.1021/acs.jpcc.2c03278
Copyright © 2022 American Chemical Society

    Article Views

    659

    Altmetric

    -

    Citations

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

    Abstract

    Abstract Image

    Bimetallic clusters can have superior catalytic properties compared to those of monometallic clusters due to synergistic interactions between the constituent metals. Here we show that atom-precise Ag clusters can be used as templates for the design of AgPd bimetallic heterogeneous catalysts using a sequential deposition approach. Atom-precise 2,4-dimethylbenzenethiol-protected Ag25(SR)18 clusters were used as precursors for sequential Pd deposition and the eventual structures of the AgPd bimetallic catalysts were revealed by X-ray absorption spectroscopy (XAS) studies. EXAFS data shows that Ag clusters on carbon supports can be thermally activated at low temperatures and then used as templates for the subsequent sequential reduction of Pd ions to form bimetallic clusters. In AgPd bimetallic catalysts with low Pd loadings, Ag atoms are predominately on the catalyst surface while Pd atoms occupy subsurface sites; however at higher Pd loadings most Pd atoms occupy surface sites. These structural changes play a significant role in the selective hydrogenation of 2-methyl-3-butyn-2-ol (MBY) to 2-methyl-3-buten-2-ol (MBE). Bimetallic AgPd catalysts showed superior activity to monometallic Ag catalysts and higher Ag/Pd ratios led to better MBE selectivity. MBE selectivity of 96.6% was obtained for 12:1-Ag:Pd/carbon catalysts and the selectivity progressively reduced with increased Pd loadings, to 0% for 1:6-Ag:Pd/carbon catalysts, in which only the fully hydrogenated product was formed. This work demonstrates a significant structure–property relationship between the geometry and the catalytic performance of AgPd bimetallic clusters prepared via a sequential deposition strategy.

    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.2c03278.

    • S 2p XPS spectra of carbon-supported Ag clusters and Ag 3d XPS spectra of carbon-supported Ag clusters thermally treated at 250 °C, additional STEM images of another particle of SD-6:1-Ag:Pd/carbon sample, XPS spectra of SD-x:y-Ag:Pd/carbon samples, XANES spectra for Ag K-edge and Pd K-edge data of SD-x:y-Ag:Pd/carbon samples with insets to show the edge shifts, experimental data of the Fourier transformed EXAFS and theoretical EXAFS fits for a representative SD-12:1-Ag:Pd/carbon sample, and recyclability test results of selected SR-x:y-Ag:Pd/carbon catalysts for hydrogenation reactions of MBY (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 has not yet been cited by other publications.

    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