Alcaide Monterrubio, FranciscoGenova-Koleva, Radostina VasilevaÁlvarez, GarbiñeGrande, Hans-JürgenMiguel, ÓscarCabot Julià, Pere-Lluís2020-09-022022-01-302020-01-300360-3199https://hdl.handle.net/2445/170100This 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 %.15 p.application/pdfengcc-by-nc-nd (c) Elsevier Ltd, 2020http://creativecommons.org/licenses/by-nc-nd/3.0/esHidrogenNanotubsHydrogenNanotubesinfo:eu-repo/semantics/article6955382020-09-02info:eu-repo/semantics/openAccess