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.

Authors with CRIS profile

Mohsen Sheikh Zadeh Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO) Seyedsina Hejazi Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO) Shiva Mohajernia Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO) Patrik Schmuki Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO)

Involved external institutions

Palacky University Olomouc / Univerzita Palackého v Olomouci

Czech Republic (CZ) Tarbiat Modares University

Iran, Islamic Republic of (IR) King Abdulaziz University (KAU) / جامعة الملك عبد العزيز

Saudi Arabia (SA)

How to cite

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).

BibTeX: Download