• Login
    View Item 
    •   Home
    • Research
    • Articles
    • View Item
    •   Home
    • Research
    • Articles
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of KAUSTCommunitiesIssue DateSubmit DateThis CollectionIssue DateSubmit Date

    My Account

    Login

    Quick Links

    Open Access PolicyORCID LibguidePlumX LibguideSubmit an Item

    Statistics

    Display statistics

    Precise Control of Pt Particle Size for Surface Structure–Reaction Activity Relationship

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    M.Harb_JPCC_122_23451_18.pdf
    Size:
    2.828Mb
    Format:
    PDF
    Description:
    Accepted Manuscript
    Download
    Type
    Article
    Authors
    Al-Shareef, Reem A. cc
    Harb, Moussab cc
    Saih, Youssef
    Ould-Chikh, Samy cc
    Anjum, Dalaver H.
    Candy, Jean-Pierre
    Basset, Jean-Marie cc
    KAUST Department
    Chemical Science Program
    Electron Microscopy
    Imaging and Characterization Core Lab
    KAUST Catalysis Center (KCC)
    Lab Consumables & Gases
    Physical Science and Engineering (PSE) Division
    Purchasing
    Date
    2018-09-27
    Online Publication Date
    2018-09-27
    Print Publication Date
    2018-10-18
    Permanent link to this record
    http://hdl.handle.net/10754/629971
    
    Metadata
    Show full item record
    Abstract
    The use of surface organometallic chemistry on metal (SOMC/M) allows the controlled and stepwise variation of the platinum particle size in Pt/SiO catalysts. This SOMC/M method is possible thanks to the better affinity of most organometallic compounds with the surface of zerovalent metal particles covered with hydrogen than their support. In this paper, Pt(acac) was used as the organometallic precursor, silica as a support, and then hydrogen to reduce the adsorbed organometallic layer on top of the starting Pt nanoparticle. We partially succeeded in adding one Pt layer with a stepwise particle size increase of around 0.6 nm when going from the first (1G) to the second (2G) refilling run, as obtained from TEM and H chemisorption analysis and then confirmed by DFT calculations. The metal loading could be kept at a very low level (<1-2 wt %), which is relevant for catalytic applications. The particle size distribution remained relatively narrow even after two refilling runs, allowing more precise relationships between particle size and catalytic properties to be established. The TOR (for hydrogenolysis) dramatically decreased, while TOR (for skeletal isomerization) slightly increased with increasing the particles size. It is therefore suggested that hydrogenolysis might preferentially occur on low coordination surface platinum atoms (corners and edges), while isomerization occurs mostly on the facets.
    Citation
    Al-Shareef R, Harb M, Saih Y, Ould-Chikh S, Anjum DH, et al. (2018) Precise Control of Pt Particle Size for Surface Structure–Reaction Activity Relationship. The Journal of Physical Chemistry C 122: 23451–23459. Available: http://dx.doi.org/10.1021/acs.jpcc.8b06346.
    Sponsors
    This work was supported by King Abdullah University of Science and Technology.
    Publisher
    American Chemical Society (ACS)
    Journal
    The Journal of Physical Chemistry C
    DOI
    10.1021/acs.jpcc.8b06346
    Additional Links
    https://pubs.acs.org/doi/10.1021/acs.jpcc.8b06346
    ae974a485f413a2113503eed53cd6c53
    10.1021/acs.jpcc.8b06346
    Scopus Count
    Collections
    Articles; Imaging and Characterization Core Lab; Physical Science and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC)

    entitlement

     
    DSpace software copyright © 2002-2021  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service hosted by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items. For anonymous users the allowed maximum amount is 50 search results.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.