KUKU

KU ScholarWorks

  • myKU
  • Email
  • Enroll & Pay
  • KU Directory
    • Login
    View Item 
    •   KU ScholarWorks
    • Dissertations and Theses
    • Theses
    • View Item
    •   KU ScholarWorks
    • Dissertations and Theses
    • Theses
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    CHARACTERIZATION OF THE ELECTRON TRANSFER REACTION MECHANISM OF TiOSO4 AND MnSO4 IN SULFURIC ACID SOLUTION

    Thumbnail
    View/Open
    Bahdad_ku_0099M_17511_DATA_1.pdf (6.358Mb)
    Issue Date
    2020-12-31
    Author
    Bahdad, Abdullah Omar O
    Publisher
    University of Kansas
    Format
    227 pages
    Type
    Thesis
    Degree Level
    M.S.
    Discipline
    Chemical & Petroleum Engineering
    Rights
    Copyright held by the author.
    Metadata
    Show full item record
    Abstract
    An electrochemical characteristic evaluation of the Ti-Mn electrolyte system in sulfuric acid aqueous solution is studied in different acid concentrations with and without the mixing of TiOSO4 and MnSO4 electrolyte system for a redox flow battery application. The reaction mechanism of Mn in sulfuric acid electrolyte is studied using the cyclic voltammetry and the anodic voltage hold techniques. The overall anodic behavior of the Mn system can be described by the oxidation reaction of Mn2+ to MnO2 where Mn3+ is an intermediate species. As the acid concentration increases, less MnO2 is formed on the working electrode and more Mn3+ is formed in the solution; however, due to the instability of Mn3+ in an aqueous solution, Mn3+ undergoes a significant hydrolysis reaction to precipitate as MnOOH in the electrolyte solution. The addition of 1M TiOSO4 to the Mn electrolyte is found to lower the H+ concentration which is believed to increase the amount of MnOOH in the solution and lower the concentration of aqueous Mn3+. The formed MnOOH by the Mn3+ hydrolysis reaction is proven to be electrochemically active if it is deposited on the working electrode. The reaction mechanism of Ti in sulfuric acid electrolyte is studied using the cyclic voltammetry technique. Two electro-active species are found to be electrochemically active within the studied voltage window which are Ti4+, and TiSO42+. In 1M H2SO4, Ti4+ is found to be the dominant electro-active species, and in 3M H2SO4, TiSO42+ is found to be the dominant electro-active species. The addition of 1M MnSO4 to the 1M TiOSO4+3M H2SO4 solution results in a high concentration of undissociated MnSO4, and it is found that the dissociation of MnSO4 to SO42- improve the activity of the redox reaction of the Ti(IV)/Ti(III) couple. With the increase of H2SO4 and the addition of MnSO4 in the Ti electrolyte, the electrochemical behavior of the Ti(IV)/Ti(III) redox couple tends toward the reversibility.
    URI
    http://hdl.handle.net/1808/32616
    Collections
    • Theses [3828]

    Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.


    We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.


    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

    Browse

    All of KU ScholarWorksCommunities & CollectionsThis Collection

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

    The University of Kansas
      Contact KU ScholarWorks
    Lawrence, KS | Maps
     
    • Academics
    • Admission
    • Alumni
    • Athletics
    • Campuses
    • Giving
    • Jobs

    The University of Kansas prohibits discrimination on the basis of race, color, ethnicity, religion, sex, national origin, age, ancestry, disability, status as a veteran, sexual orientation, marital status, parental status, gender identity, gender expression and genetic information in the University’s programs and activities. The following person has been designated to handle inquiries regarding the non-discrimination policies: Director of the Office of Institutional Opportunity and Access, IOA@ku.edu, 1246 W. Campus Road, Room 153A, Lawrence, KS, 66045, (785)864-6414, 711 TTY.

     Contact KU
    Lawrence, KS | Maps