Interface-dependent electrochemical behavior of nanostructured manganese (IV) oxide (Mn3O4)

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • JiaYin Liu
  • M. Baris Okatan
  • Rose Amal
  • Kashinath A. Bogle
  • Valanoor Nagarajan

Detail(s)

Original languageEnglish
Pages (from-to)810-817
Journal / PublicationElectrochimica Acta
Volume130
Online published30 Mar 2014
Publication statusPublished - 1 Jun 2014
Externally publishedYes

Abstract

We report on the crystallographic orientational dependence of the electrochemical behaviour in nanostructured manganese oxide. Manganese Oxide (Mn3O4) nanocrystals have been deposited on Nb-doped Strontium Titanate (Nb:SrTiO3) substrate via pulsed laser deposition. (001), (101) and (112) orientated nanocrystals were successfully grown on (100), (110) and (111) Nb:SrTiO3 substrates respectively. Analysis of the lattice arrangements suggests that nanostructure growth may be driven more by polarity rather than the epitaxial strain such that electrostatic repulsion can be minimised. Cyclic voltammetry (CV) in 1 M Na2SO4 electrolyte was performed to understand how specific capacitance values vary with changing lattice orientations. The maximum specific capacitance calculated for the (100) orientation was 34 F/g, obtained after the 3000th cycle. Beyond this the CV loop plateaus rapidly and structural analysis of this sample revealed a morphological transformation from the (001) orientation to the (101) platelet structures. The maximum specific capacitance obtained was for the (112) sample (120F/g) suggesting that such non-primary planes in spinel oxides may be most attractive for electrochemical applications. © 2014 Elsevier Ltd.

Research Area(s)

  • Capacitance, Electrochemistry, Epitaxy, Interface, Oxide

Citation Format(s)

Interface-dependent electrochemical behavior of nanostructured manganese (IV) oxide (Mn3O4). / Liu, JiaYin; Ng, Yun Hau; Okatan, M. Baris; Amal, Rose; Bogle, Kashinath A.; Nagarajan, Valanoor.

In: Electrochimica Acta, Vol. 130, 01.06.2014, p. 810-817.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review