Intrinsically Ru-Doped Suboxide TiO2Nanotubes for Enhanced Photoelectrocatalytic H2Generation

Khorashadizade E, Mohajernia S, Hejazi S, Mehdipour H, Naseri N, Moradlou O, Moshfegh AZ, Schmuki P (2021)

Publication Type: Journal article

Publication year: 2021

Journal

DOI: 10.1021/acs.jpcc.1c00459

Abstract

In the present research, we investigate the synergistic effects of Ru-doping and Ar/H2 reduction treatment on the photoelectrochemical water splitting performance and hydrogen evolution rate of TiO2 nanotube array photoelectrodes. The Ti-Ru alloy with 0.2 at. % Ru was used to grow anodic self-organized Ru-doped TiO2 nanotube layers. An ideal synergy between Ar/H2 reduction treatment and Ru-doping results in the extended absorption toward the visible light region and improved photoelectrocatalytic activity. The black Ru-doped TiO2-x photoanode's water splitting rate improves remarkably (∼ninefold) compared to the black TiO2-x sample (∼twofold). Moreover, the black Ru-doped TiO2-x photoanode shows a considerable increase in the H2 production rate (1.91 μmol h-1 cm-2) compared with the pristine TiO2 nanotube layer (0.044 μmol h-1 cm-2). We have also developed an ab initio model of pristine, Ru-doped, and Ru-doped hydrogenated TiO2 nanotubes to rationalize our experimental findings from the theoretical perspective.

Authors with CRIS profile

Involved external institutions

Sharif University of Technology / دانشگاه صنعتی شریف (SUT) Iran, Islamic Republic of (IR) Alzahra University / دانشگاه الزهراء Iran, Islamic Republic of (IR)

How to cite

APA:

Khorashadizade, E., Mohajernia, S., Hejazi, S., Mehdipour, H., Naseri, N., Moradlou, O.,... Schmuki, P. (2021). Intrinsically Ru-Doped Suboxide TiO2Nanotubes for Enhanced Photoelectrocatalytic H2Generation. Journal of Physical Chemistry C. https://dx.doi.org/10.1021/acs.jpcc.1c00459

MLA:

Khorashadizade, Elham, et al. "Intrinsically Ru-Doped Suboxide TiO2Nanotubes for Enhanced Photoelectrocatalytic H2Generation." Journal of Physical Chemistry C (2021).

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