NDLI: Morphology-controlled In<sub>2</sub>O<sub>3</sub> nanostructures enhance the performance of photoelectrochemical water oxidation

Content Provider	Royal Society of Chemistry (RSC)
Author	Chen, Changlong Soheilnia, Navid Mahler, Benoit Hoch, Laura Hoepfner, Veronika He, Le O'Brien, Paul Moir, Jonathon Liao, Kristine Ozin, Geoffrey A. Qian, Chenxi
Copyright Year	2015
Abstract	Nanotower- and nanowall-like indium oxide structures were grown directly on fluorine-doped tin oxide (FTO)/In2O3 seeded substrates and pristine FTO substrates, respectively, by a straightforward solvothermal method. The tower-like nanostructures are proposed to form via a self-assembly process on the In2O3 seeds. The wall-like nanostructures are proposed to form via epitaxial growth from the exposed edges of SnO2 crystals of the FTO substrate. The nanotowers and nanowalls are composed of highly crystalline and ordered nanocrystals with preferred orientations in the [111] and [110] directions, respectively. The two structures display remarkably different activities when used as photoanodes in solar light-driven water splitting. X-ray photoelectron spectroscopy results suggest an increased density of hydroxyl groups in the nanowalls, which results in a decrease of the work function and a concomitant shift in the onset potential of the photocurrent in the linear sweep voltammograms, which is further confirmed by Mott–Schottky and flat-band potential measurements, indicating the importance of hydroxyl content in determining the photoelectrochemical properties of the films. Morphology-controlled, nanostructured transparent conducting oxide electrodes of the kind described in this paper are envisioned to provide valuable platforms for supporting catalysts and co-catalysts that are intentionally tailored for efficient light-assisted oxidation of water and reduction of carbon dioxide.
Starting Page	3683
Ending Page	3693
Page Count	11
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	7
Issue Number	8
Journal	Nanoscale
DOI	10.1039/c4nr07394k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	FTO Water splitting Mott Carbon dioxide Photoemission spectroscopy Indium Transparent conducting film Self-assembly Hydroxy group Work function Photocurrent Tin Photoelectrochemical cell X-ray photoelectron spectroscopy
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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