Photoelectrochemical performance of TiO2 photoanodes: Nanotube versus nanoflake electrodes

Zhou X, Denisov N, Cha G, Hwang I, Schmuki P (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Book Volume: 124

Article Number: 106937

DOI: 10.1016/j.elecom.2021.106937

Abstract

In the present work, we compare the photoresponse of vertically erected (VE) single crystal anatase layers with that of widely used TiO2 nanotube layers. These VE-anatase layers were grown hydrothermally, directly on fluorine-doped tin oxide (FTO) glass, and consist of an array of anatase single crystal flakes with preferred (0 0 1) facets. As formed, these single crystal layers are fluorine terminated – this termination can be removed by a thermal treatment in air. We compare the photocurrent magnitude and photocurrent transients using intensity-modulated photocurrent spectroscopy (IMPS). We find that the “de-fluorinated” VE-anatase layers show significantly higher photocurrents than the comparable nanotube layers. This high efficiency of the VE-anatase layers is due to the electron transport being 100 times faster in these single crystal electrodes, provided that the blocking fluorine termination is removed.

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How to cite

APA:

Zhou, X., Denisov, N., Cha, G., Hwang, I., & Schmuki, P. (2021). Photoelectrochemical performance of TiO2 photoanodes: Nanotube versus nanoflake electrodes. Electrochemistry Communications, 124. https://doi.org/10.1016/j.elecom.2021.106937

MLA:

Zhou, Xin, et al. "Photoelectrochemical performance of TiO2 photoanodes: Nanotube versus nanoflake electrodes." Electrochemistry Communications 124 (2021).

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