• 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

    Molybdenum carbide-carbon nanocomposites synthesized from a reactive template for electrochemical hydrogen evolution

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Type
    Article
    Authors
    Alhajri, Nawal Saad cc
    Anjum, Dalaver H. cc
    Takanabe, Kazuhiro cc
    KAUST Department
    Advanced Nanofabrication, Imaging and Characterization Core Lab
    Catalysis for Energy Conversion (CatEC)
    Chemical Science Program
    Core Labs
    Imaging and Characterization Core Lab
    KAUST Catalysis Center (KCC)
    Physical Science and Engineering (PSE) Division
    Date
    2014
    Permanent link to this record
    http://hdl.handle.net/10754/563211
    
    Metadata
    Show full item record
    Abstract
    Molybdenum carbide nanocrystals (Mo2C) with sizes ranging from 3 to 20 nm were synthesized within a carbon matrix starting from a mesoporous graphitic carbon nitride (mpg-C3N4) template with confined pores. A molybdenum carbide phase (Mo2C) with a hexagonal structure was formed using a novel synthetic method involving the reaction of a molybdenum precursor with the carbon residue originating from C3N4 under nitrogen at various temperatures. The synthesized nanocomposites were characterized using powder X-ray diffraction (XRD), temperature-programmed reaction with mass spectroscopy (MS), CHN elemental analyses, thermogravimetric analyses (TGA), nitrogen sorption, X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). The results indicated that the synthesized samples have different surface structures and compositions, which are accordingly expected to exhibit different electrocatalytic activities toward the hydrogen evolution reaction (HER). Electrochemical measurements demonstrated that the sample synthesized at 1323 K exhibited the highest and most stable HER current in acidic media, with an onset potential of -100 mV vs. RHE, among the samples prepared in this study. This result is attributed to the sufficiently small particle size (∼8 nm on average) and accordingly high surface area (308 m2 g-1), with less oxidized surface entrapped within the graphitized carbon matrix. © 2014 the Partner Organisations.
    Citation
    Alhajri, N. S., Anjum, D. H., & Takanabe, K. (2014). Molybdenum carbide–carbon nanocomposites synthesized from a reactive template for electrochemical hydrogen evolution. J. Mater. Chem. A, 2(27), 10548–10556. doi:10.1039/c4ta00577e
    Sponsors
    The authors thank Dr Mohamed Nejib Hedhili at Advanced Nanofabrication, Imaging and Characterization Core Lab, King Abdullah University of Science and Technology for XPS measurements. N.S.A. acknowledges Saudi Aramco for financial support.
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    Journal of Materials Chemistry A
    DOI
    10.1039/c4ta00577e
    ae974a485f413a2113503eed53cd6c53
    10.1039/c4ta00577e
    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.