Template-free nanostructured fluorine-doped tin oxide scaffolds for photoelectrochemical water splitting

Ivan Garcia-Torregrosa, Jochem H.J. Wijten, Silvia Zanoni, Freddy Oropeza Palacio, Jan Philipp Hofmann, Emiel Hensen, Bert M. Weckhuysen (Corresponding author)

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Abstract

The synthesis and characterization of highly stable and conductive F:SnO 2 (FTO) nanopyramid arrays are investigated, and their use as scaffolds for water splitting is demonstrated. Current densities during the oxygen evolution reaction with a NiFeO x catalyst at 2 V vs reversible hydrogen electrode were increased 5-fold when substituting commercial FTO (TEC 15) by nanostructured FTO scaffolds. In addition, thin α-Fe 2O 3 films (∼50 nm thick) were employed as a proof of concept to show the effect of our nanostructured scaffolds during photoelectrochemical water splitting. Double-layer capacitance measurements showed a drastic increase of the relative electrochemically active surface area for the nanostructured samples, in agreement with the observed photocurrent enhancement, whereas UV-vis spectroscopy indicates full absorption of visible light at wavelengths below 600 nm.

Original languageEnglish
Pages (from-to)36485-36496
Number of pages12
JournalACS Applied Materials & Interfaces
Volume11
Issue number40
DOIs
Publication statusPublished - 9 Oct 2019

Fingerprint

Fluorine
Tin oxides
Scaffolds
Water
Capacitance measurement
Ultraviolet spectroscopy
Photocurrents
Hydrogen
Current density
Oxygen
Wavelength
Electrodes
Catalysts
stannic oxide

Keywords

  • nanostructuring
  • photoelectrode
  • spectroscopy
  • spray pyrolysis
  • water splitting

Cite this

Garcia-Torregrosa, Ivan ; Wijten, Jochem H.J. ; Zanoni, Silvia ; Oropeza Palacio, Freddy ; Hofmann, Jan Philipp ; Hensen, Emiel ; Weckhuysen, Bert M. / Template-free nanostructured fluorine-doped tin oxide scaffolds for photoelectrochemical water splitting. In: ACS Applied Materials & Interfaces. 2019 ; Vol. 11, No. 40. pp. 36485-36496.
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Template-free nanostructured fluorine-doped tin oxide scaffolds for photoelectrochemical water splitting. / Garcia-Torregrosa, Ivan; Wijten, Jochem H.J. ; Zanoni, Silvia; Oropeza Palacio, Freddy; Hofmann, Jan Philipp; Hensen, Emiel; Weckhuysen, Bert M. (Corresponding author).

In: ACS Applied Materials & Interfaces, Vol. 11, No. 40, 09.10.2019, p. 36485-36496.

Research output: Contribution to journalArticleAcademicpeer-review

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