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

ABSTRACT: The synthesis and characterization of highly stable and conductive F:SnO2 (FTO) nanopyramid arrays are investigated, and their use as scaffolds for water splitting is demonstrated. Current densities during the oxygen evolution reaction with a NiFeOx 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-Fe2O3 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.

SUBMITTER: Garcia-Torregrosa I 

PROVIDER: S-EPMC6790916 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature

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

Garcia-Torregrosa Ivan I   Wijten Jochem H J JHJ   Zanoni Silvia S   Oropeza Freddy E FE   Hofmann Jan P JP   Hensen Emiel J M EJM   Weckhuysen Bert M BM  

ACS applied materials & interfaces 20190930 40

The synthesis and characterization of highly stable and conductive F:SnO<sub>2</sub> (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<i><sub>x</sub></i> 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<sub>2</sub>O<sub>3</sub> films (∼50 nm thick) were e  ...[more]

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