• 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

    TiO2-supported Pt single atoms by surface organometallic chemistry for photocatalytic hydrogen evolution.

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    PCCP_2019.pdf
    Size:
    5.068Mb
    Format:
    PDF
    Description:
    publisher's version
    Download
    Type
    Article
    Authors
    Jeantelot, Gabriel cc
    Qureshi, Muhammad cc
    Harb, Moussab cc
    Ould-Chikh, Samy cc
    Anjum, Dalaver H. cc
    Abou-Hamad, Edy cc
    Aguilar-Tapia, Antonio cc
    Hazemann, Jean-Louis cc
    Takanabe, Kazuhiro cc
    Basset, Jean-Marie cc
    KAUST Department
    Catalysis for Energy Conversion (CatEC)
    Chemical Science Program
    Electron Microscopy
    Imaging and Characterization Core Lab
    KAUST Catalysis Center (KCC)
    Kaust Catalysis Center (KCC), Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
    NMR
    Physical Science and Engineering (PSE) Division
    Date
    2019-11-02
    Embargo End Date
    2020-11-02
    Permanent link to this record
    http://hdl.handle.net/10754/660086
    
    Metadata
    Show full item record
    Abstract
    A platinum complex, (CH3)2Pt(COD), is grafted via surface organometallic chemistry (SOMC) on morphology-controlled anatase TiO2 to generate single, isolated Pt atoms on TiO2 nano-platelets. The resulting material is characterized by FT-IR, high resolution scanning transmission electron microscopy (HRSTEM), NMR, and XAS, and then used to perform photocatalytic water splitting. The photocatalyst with SOMC-grafted Pt shows superior performance in photocatalytic hydrogen evolution and strongly suppresses the backwards reaction of H2 and O2 forming H2O under dark conditions, compared to the photocatalyst prepared by impregnation at the same Pt loading. However, single Pt atoms on this surface also rapidly coalesce into nanoparticles under photocatalytic conditions. It is also found that adsorption of CO gas at room temperature also triggers the aggregation of Pt single atoms into nanoparticles. A detailed mechanism is investigated for the mobility of Pt in the formation of its carbonyls using density functional theory (DFT) calculations.
    Citation
    Jeantelot, G., Qureshi, M., Harb, M., Ould-Chikh, S., Anjum, D. H., Abou-Hamad, E., … Basset, J.-M. (2019). TiO2-supported Pt single atoms by surface organometallic chemistry for photocatalytic hydrogen evolution. Physical Chemistry Chemical Physics. doi:10.1039/c9cp04470a
    Sponsors
    This work was supported by the King Abdullah University of Science and Technology (KAUST). We warmly acknowledge the help of KAUST Core labs, and the Supercomputing Laboratory at KAUST for the CPU time attributed to this research work. The FAME-UHD project is financially supported by the French “large loan” EquipEx (EcoX, ANR-10-EQPX-27-01), the CEA-CNRS CRG consortium and the INSU CNRS institute.
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    Physical chemistry chemical physics : PCCP
    DOI
    10.1039/c9cp04470a
    Additional Links
    http://xlink.rsc.org/?DOI=C9CP04470A
    ae974a485f413a2113503eed53cd6c53
    10.1039/c9cp04470a
    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.