Photocatalytic H-2 Evolution: Dealloying as Efficient Tool for the Fabrication of Rh-decorated TiO2 Nanotubes

Sheikh Zadeh M, Hejazi S, Mohajernia S, Tomanec O, Mokhtar M, Alshehri A, Sanjabi S, Zboril R, Schmuki P (2019)


Publication Type: Journal article

Publication year: 2019

Journal

DOI: 10.1002/cctc.201901183

Abstract

In this work, we report on a facile and novel method for decorating titanium dioxide (TiO2) nanotubes with Rh nanoparticle-nanonetworks that act as co-catalysts in photocatalytic H-2 generation. In a first step, a Ti-Rh (0.2 at%) alloy is etched in Kroll's solution leading to a dealloyed surface decorated with a Rh nanoparticle-network of adjustable geometry and loading. By subsequent anodization of the alloy samples, Rh:TiO2 nanotubes can be grown where the tube mouths are strongly decorated with the Rh nanoparticle network (RhNw). As evident from X-ray photoelectron spectroscopy (XPS) analysis, these Rh oxide Nws are converted to metallic Rh under UV irradiation. As a result, with time a steady increase of the H-2 evolution from the RhNw decorated TiO2 nanotubes is observed. Nanotubes carrying RhNw yield in photocatalytic experiments a 5-times higher H-2 evolution activity in comparison with nanotubes decorated by conventional Rh-sputtering (the same loading), and show a 228 times higher activity than pristine TiO2 nanotubes.

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APA:

Sheikh Zadeh, M., Hejazi, S., Mohajernia, S., Tomanec, O., Mokhtar, M., Alshehri, A.,... Schmuki, P. (2019). Photocatalytic H-2 Evolution: Dealloying as Efficient Tool for the Fabrication of Rh-decorated TiO2 Nanotubes. ChemCatChem. https://doi.org/10.1002/cctc.201901183

MLA:

Sheikh Zadeh, Mohsen, et al. "Photocatalytic H-2 Evolution: Dealloying as Efficient Tool for the Fabrication of Rh-decorated TiO2 Nanotubes." ChemCatChem (2019).

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