Template-Free Nanostructured Fluorine-Doped Tin Oxide Scaffolds for Photoelectrochemical Water Splitting.

Author(s) Garcia-Torregrosa, I.; Wijten, J.H.J.; Zanoni, S.; Oropeza, F.E.; Hofmann, J.P.; Hensen, E.J.M.; Weckhuysen, B.M.
Journal ACS Appl Mater Interfaces
Date Published 2019 Oct 09

The synthesis and characterization of highly stable and conductive F:SnO (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 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-FeO 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.

DOI 10.1021/acsami.9b05176
ISSN 1944-8252
Citation ACS Appl Mater Interfaces. 2019;11(40):3648536496.

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