Browsing by Author "Modibedi, Mmalewane"

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Development of palladium nickel/tin metal oxide catalysts on carbon nanotube supports for direct alcohol fuel cells
    (University of Western Cape, 2020) Juqu, Thando; Khotseng, Lindiwe; Modibedi, Mmalewane
    Palladium can be used as an anodic catalyst for the alkaline direct alcohol fuel cells (ADAFCs). Palladium has displayed high tolerance towards carbon monoxide (CO) poisoning and high catalytic activity for alcohol oxidation reaction in alkaline medium. Palladium-based catalysts have arisen as an alternative to performing alcohol oxidation reaction, especially when combined with other transition metals and multi walled carbon nanotubes (MWCNT) as a support, which induces changes in the palladium electronic structure, and thus, increasing its activity. This research is focused on the development of palladium catalysts incorporated with nickel and tin (transitional metals) on multi walled carbon nanotubes for alkaline direct glycerol fuel cells.
  • Thumbnail Image
    Item
    Electrochemical studies of Pd-based anode catalysts in alkaline medium for direct glycerol fuel cells
    (MDPI, 2020) Klaas, Lutho; Modibedi, Mmalewane; Mathe, Mkhulu Kenny
    his study investigates the most effective electrocatalyst for glycerol oxidation reaction (GOR) in alkaline medium for five synthesized electrocatalysts, Pd, PdNi, PdNiO, PdMn3O4 and PdMn3O4NiO, supported on multi-walled carbon nanotubes (MWCNTs) prepared using the polyol method. The particle size and crystalline size of the electrocatalysts were determined using HR-TEM and XRD techniques, respectively, while EDS was used to determine the elemental composition. XRD showed crystalline sizes ranging from 3.4 to 10.1 nm, while HR-TEM revealed particle sizes within the range of 3.4 and 7.2 nm.