Synthesis of MnOx water oxidation catalyst on fluorine-doped tin oxide with a dual-series cyclic voltammetry method

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Abstract

This Communication reports a new method for synthesizing manganese-based water oxidation catalysts in situ in aqueous media. The method provides powerful tunability of the electrodeposition process to enable independent control over the morphology of the catalytic film and the oxidation state of the catalyst. Our results show that the first cyclic voltammetry (CV) series produces a film with a nanoscale fibrous structure, whereas the second CV series improves its catalytic performance by enhancing the oxidation state of the film without damaging the existing surface morphology. Scanning electron microscopy and transmission electron microscopy were used to characterize the morphology of the MnOx film, CV was used to assess the catalyst functionality, and long-term amperometry was used to assess the stability.

LanguageEnglish (US)
Pages709-712
Number of pages4
JournalChemElectroChem
Volume3
Issue number5
DOIs
StatePublished - 2016

Profile

Fluorine
Tin oxides
Cyclic voltammetry
Oxidation
Catalysts
Water
Manganese
Electrodeposition
Surface morphology
Transmission electron microscopy
Scanning electron microscopy
stannic oxide
Communication

Keywords

  • Electrocatalysis
  • Electrodeposition
  • Hydrogen
  • Manganese oxide
  • Water splitting

ASJC Scopus subject areas

  • Catalysis
  • Electrochemistry

Cite this

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abstract = "This Communication reports a new method for synthesizing manganese-based water oxidation catalysts in situ in aqueous media. The method provides powerful tunability of the electrodeposition process to enable independent control over the morphology of the catalytic film and the oxidation state of the catalyst. Our results show that the first cyclic voltammetry (CV) series produces a film with a nanoscale fibrous structure, whereas the second CV series improves its catalytic performance by enhancing the oxidation state of the film without damaging the existing surface morphology. Scanning electron microscopy and transmission electron microscopy were used to characterize the morphology of the MnOx film, CV was used to assess the catalyst functionality, and long-term amperometry was used to assess the stability.",
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AU - Ofoli,Robert Y.

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AB - This Communication reports a new method for synthesizing manganese-based water oxidation catalysts in situ in aqueous media. The method provides powerful tunability of the electrodeposition process to enable independent control over the morphology of the catalytic film and the oxidation state of the catalyst. Our results show that the first cyclic voltammetry (CV) series produces a film with a nanoscale fibrous structure, whereas the second CV series improves its catalytic performance by enhancing the oxidation state of the film without damaging the existing surface morphology. Scanning electron microscopy and transmission electron microscopy were used to characterize the morphology of the MnOx film, CV was used to assess the catalyst functionality, and long-term amperometry was used to assess the stability.

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KW - Water splitting

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