• Login
    View Item 
    •   Oxy Scholar Home
    • Physics
    • Physics URC Student Scholarship
    • View Item
    •   Oxy Scholar Home
    • Physics
    • Physics URC Student Scholarship
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Engineering and Characterization of Bi- and Trimetallic Nanocrystals for Catalysis in Model Ethanol Fuel Cells

    Thumbnail
    Author
    Sells, Marc
    Issue
    urc_student
    Date
    2006-01-01
    Metadata
    Show full item record
    URI
    https://scholar.oxy.edu/handle/20.500.12711/1051
    Abstract
    The electrocatalytic activity of nanocrystals composed of Pt, Rh, and Sn suspended on glassy carbon electrodes were investigated in a model direct ethanol fuel cell. The atomic ratios of Pt-Rh bimetallic catalysts were varied in the micelles synthesis procedure to explore the most efficient electrooxidation of ethanol. Pt nanocrystals were first synthesized as a control. Pt-Rh bimetallic nanocrystals were synthesized in molar compositions of 2:3, 3:1, and 4:1. A Pt-Rh-Sn trimetallic nanostructured catalyst was synthesized in an atomic composition 3:2:1. The nanocrystals were characterized physically using Transmission Electron Microscopy (TEM) and Energy Dispersive X-ray (EDX) Analysis. From the TEM data, the average size of the produced nanocrystals was determined to be 5nm. Each sample was characterized electrochemically using cyclic voltammetry (CV). From the CV data, Rh concentrations of over 20% resulted in lower current densities than solely Pt, while the 4:1 Pt-Rh ratio had 2.32x more catalytic activity. The ternary nanocrystals resulted with 4.1x higher current density, proving to be the most active catalyst of the study.
    Collections
    • Physics URC Student Scholarship

    Browse

    All of Oxy ScholarCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsJournal TitleJournal IssueThis CollectionBy Issue DateAuthorsTitlesSubjectsJournal TitleJournal Issue

    My Account

    LoginRegister

    DSpace software copyright © 2002-2021  DuraSpace
    Contact Us | Send Feedback
    DSpace Express is a service operated by 
    Atmire NV