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Title: | Platinum-catalyzed Nb-doped TiO2 and Nb-doped TiO2 nanotubes for hydrogen generation in proton exchange membrane water electrolyzers |
Author: | Alcaide Monterrubio, Francisco Genova-Koleva, Radostina Vasileva Álvarez, Garbiñe Grande, Hans-Jürgen Miguel, Óscar Cabot Julià, Pere-Lluís |
Keywords: | Hidrogen Nanotubs Hydrogen Nanotubes |
Issue Date: | 30-Jan-2020 |
Publisher: | Elsevier Ltd |
Abstract: | This paper studies the catalytic activity of Pt deposited onto Nb-doped titania supports toward the hydrogen evolution reaction (HER). New catalysts based on Nb-doped TiO2 nanoparticles (nNb-TiO2) and Nb-doped TiO2 nanotubes (nNb-TNTs), with n in the range 3-10 at % (Nb+Ti), were synthesized. The specific surface areas of nNb-TNTs were 250−300 m2g-1, about three times higher than those of nNb-TiO2. X-ray diffraction showed the Nb incorporation into the TiO2 lattice with its consequent lattice expansion. The X-ray photoelectron spectra of Pt deposited onto Nb-doped titania revealed a negative charge accumulation on Pt, thus denoting strong metal-support interaction. The electrochemical characterization in acidic media showed that Pt supported on nNb-TiO2 and nNb-TNTs presented better activity towards the HER than that of Pt deposited onto the un-doped supports and commercial Pt on carbon. The best performance was obtained with a small Nb doping of 3 at %. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1016/j.ijhydene.2020.01.057 |
It is part of: | International Journal of Hydrogen Energy, 2020, vol. 45, num. 40, p. 20605-20619 |
URI: | http://hdl.handle.net/2445/170100 |
Related resource: | https://doi.org/10.1016/j.ijhydene.2020.01.057 |
ISSN: | 0360-3199 |
Appears in Collections: | Articles publicats en revistes (Ciència dels Materials i Química Física) |
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