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 language | English |
|---|---|
| Pages (from-to) | 36485-36496 |
| Number of pages | 12 |
| Journal | ACS Applied Materials & Interfaces |
| Volume | 11 |
| Issue number | 40 |
| DOIs | |
| Publication status | Published - 9 Oct 2019 |
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Keywords
- nanostructuring
- photoelectrode
- spectroscopy
- spray pyrolysis
- water splitting
Cite this
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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 journal › Article › Academic › peer-review
TY - JOUR
T1 - Template-free nanostructured fluorine-doped tin oxide scaffolds for photoelectrochemical water splitting
AU - Garcia-Torregrosa, Ivan
AU - Wijten, Jochem H.J.
AU - Zanoni, Silvia
AU - Oropeza Palacio, Freddy
AU - Hofmann, Jan Philipp
AU - Hensen, Emiel
AU - Weckhuysen, Bert M.
PY - 2019/10/9
Y1 - 2019/10/9
N2 - 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.
AB - 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.
KW - nanostructuring
KW - photoelectrode
KW - spectroscopy
KW - spray pyrolysis
KW - water splitting
UR - http://www.scopus.com/inward/record.url?scp=85073108603&partnerID=8YFLogxK
U2 - 10.1021/acsami.9b05176
DO - 10.1021/acsami.9b05176
M3 - Article
C2 - 31523952
VL - 11
SP - 36485
EP - 36496
JO - ACS Applied Materials & Interfaces
JF - ACS Applied Materials & Interfaces
SN - 1944-8244
IS - 40
ER -