Manganese Oxide Nanorods: Synthesis, Characterization, and Electrocatalytic Applications

El-Deab, M. S., and T. Ohsaka, "Manganese Oxide Nanorods: Synthesis, Characterization, and Electrocatalytic Applications", Advances in Nanotechnology, 2011.


This chapter describes our recent researches on the fabrication and characterization of electrochemically-prepared metal oxide nanostructures, i.e., manganese oxide, onto various substrates, e.g., glassy carbon (GC), gold (Au), platinum (Pt) and multi wall carbon nanotubes (MWCNTs) and their applications as electrocatalys for reactions of relevance to, among others, the polymer electrolyte membrance fuel cell, e.g., oxygen reduction and evolution reactions as well as methanol and formic acid oxidation reactions. This includes the electrodeposition of crystallographically oriented manganese oxide nanorods (in the manganite phase) onto the various substrates. Details of the morphological and the electrochemical characterizations of the thus-fabricated manganese oxide nanorods are outlined. This includes scanning electron microscope imaging (SEM), high resolution transmission electron microscope (HR-TEM), X-ray diffraction (XRD) patterns and XPS data. The excellent reversible redox properties of the thus-prepared manganese oxide nanorods markedly enhanced the electrocatalytic activity of the modified electrodes towards water electrolysis as well as formic acid and methanol oxidation reactions.