A novel platinum-based nanocatalyst at a niobia-doped titania support for the hydrogen oxidation reaction

2011
Authors
Elezović, Nevenka
Babić, Biljana M.
Radmilović, Velimir R.

Gajić Krstajić, Ljiljana

Krstajić, Nedeljko
Vračar, Ljiljana
Article (Published version)
Metadata
Show full item recordAbstract
The kinetics of the hydrogen oxidation reaction (HOR) was studied at Pt nanoparticles supported on niobia-doped titania (Pt/N-T). The catalyst support, with the composition of 0.05NbO2.5-δ-0.995TiO2 (0<δ<1), was synthesized by a modified sol-gel procedure and characterized by the BET and X-ray diffraction (XRD) techniques. The specific surface area of the support was found to be 70 m2 g-1. The XRD analysis revealed the presence of the anatase TiO2 phase in the support powder. No peaks indicating the existence of Nb-compounds were detected. Pt/N-T nanocatalyst was synthesized by the borohydride reduction method. Transmission electron microscopy revealed a quite homogenous distribution of the Pt nanoparticles over the support, with a mean particle size of about 3 nm. The electrochemical active surface area of Pt of 42±4 m2 g-1 was determined by the cyclic voltammetry technique. The kinetics of the HOR was investigated by linear sweep voltammetry at a rotating disc electrode in 0.5 mol dm...-3 HClO4 solution. The determined value of the Tafel slope of 35 mV dec-1 and an exchange current density of 0.45 mA cm-2 per real surface area of the Pt are in good accordance with those already reported in the literature for the HOR at polycrystalline Pt and Pt nanocatalysts in acid solutions. This new catalyst exhibited better activity for the HOR in comparison with Pt nanocatalyst supported on Vulcan® XC-72R high area carbon.
Keywords:
niobia-doped titania support / Pt nanocatalyst / hydrogenoxidation reaction / fuel cellSource:
Journal of the Serbian Chemical Society, 2011, 76, 8, 1139-1152Publisher:
- Belgrade : Serbian Chemical Society
Funding / projects:
DOI: 10.2298/JSC100823100E
ISSN: 0352-5139; 1820-7421 (Online)
WoS: 000294746200008
Scopus: 2-s2.0-80051917513
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Elezović, Nevenka AU - Babić, Biljana M. AU - Radmilović, Velimir R. AU - Gajić Krstajić, Ljiljana AU - Krstajić, Nedeljko AU - Vračar, Ljiljana PY - 2011 UR - https://dais.sanu.ac.rs/123456789/260 AB - The kinetics of the hydrogen oxidation reaction (HOR) was studied at Pt nanoparticles supported on niobia-doped titania (Pt/N-T). The catalyst support, with the composition of 0.05NbO2.5-δ-0.995TiO2 (0<δ<1), was synthesized by a modified sol-gel procedure and characterized by the BET and X-ray diffraction (XRD) techniques. The specific surface area of the support was found to be 70 m2 g-1. The XRD analysis revealed the presence of the anatase TiO2 phase in the support powder. No peaks indicating the existence of Nb-compounds were detected. Pt/N-T nanocatalyst was synthesized by the borohydride reduction method. Transmission electron microscopy revealed a quite homogenous distribution of the Pt nanoparticles over the support, with a mean particle size of about 3 nm. The electrochemical active surface area of Pt of 42±4 m2 g-1 was determined by the cyclic voltammetry technique. The kinetics of the HOR was investigated by linear sweep voltammetry at a rotating disc electrode in 0.5 mol dm-3 HClO4 solution. The determined value of the Tafel slope of 35 mV dec-1 and an exchange current density of 0.45 mA cm-2 per real surface area of the Pt are in good accordance with those already reported in the literature for the HOR at polycrystalline Pt and Pt nanocatalysts in acid solutions. This new catalyst exhibited better activity for the HOR in comparison with Pt nanocatalyst supported on Vulcan® XC-72R high area carbon. PB - Belgrade : Serbian Chemical Society T2 - Journal of the Serbian Chemical Society T1 - A novel platinum-based nanocatalyst at a niobia-doped titania support for the hydrogen oxidation reaction SP - 1139 EP - 1152 VL - 76 IS - 8 DO - 10.2298/JSC100823100E UR - https://hdl.handle.net/21.15107/rcub_dais_260 ER -
@article{ author = "Elezović, Nevenka and Babić, Biljana M. and Radmilović, Velimir R. and Gajić Krstajić, Ljiljana and Krstajić, Nedeljko and Vračar, Ljiljana", year = "2011", abstract = "The kinetics of the hydrogen oxidation reaction (HOR) was studied at Pt nanoparticles supported on niobia-doped titania (Pt/N-T). The catalyst support, with the composition of 0.05NbO2.5-δ-0.995TiO2 (0<δ<1), was synthesized by a modified sol-gel procedure and characterized by the BET and X-ray diffraction (XRD) techniques. The specific surface area of the support was found to be 70 m2 g-1. The XRD analysis revealed the presence of the anatase TiO2 phase in the support powder. No peaks indicating the existence of Nb-compounds were detected. Pt/N-T nanocatalyst was synthesized by the borohydride reduction method. Transmission electron microscopy revealed a quite homogenous distribution of the Pt nanoparticles over the support, with a mean particle size of about 3 nm. The electrochemical active surface area of Pt of 42±4 m2 g-1 was determined by the cyclic voltammetry technique. The kinetics of the HOR was investigated by linear sweep voltammetry at a rotating disc electrode in 0.5 mol dm-3 HClO4 solution. The determined value of the Tafel slope of 35 mV dec-1 and an exchange current density of 0.45 mA cm-2 per real surface area of the Pt are in good accordance with those already reported in the literature for the HOR at polycrystalline Pt and Pt nanocatalysts in acid solutions. This new catalyst exhibited better activity for the HOR in comparison with Pt nanocatalyst supported on Vulcan® XC-72R high area carbon.", publisher = "Belgrade : Serbian Chemical Society", journal = "Journal of the Serbian Chemical Society", title = "A novel platinum-based nanocatalyst at a niobia-doped titania support for the hydrogen oxidation reaction", pages = "1139-1152", volume = "76", number = "8", doi = "10.2298/JSC100823100E", url = "https://hdl.handle.net/21.15107/rcub_dais_260" }
Elezović, N., Babić, B. M., Radmilović, V. R., Gajić Krstajić, L., Krstajić, N.,& Vračar, L.. (2011). A novel platinum-based nanocatalyst at a niobia-doped titania support for the hydrogen oxidation reaction. in Journal of the Serbian Chemical Society Belgrade : Serbian Chemical Society., 76(8), 1139-1152. https://doi.org/10.2298/JSC100823100E https://hdl.handle.net/21.15107/rcub_dais_260
Elezović N, Babić BM, Radmilović VR, Gajić Krstajić L, Krstajić N, Vračar L. A novel platinum-based nanocatalyst at a niobia-doped titania support for the hydrogen oxidation reaction. in Journal of the Serbian Chemical Society. 2011;76(8):1139-1152. doi:10.2298/JSC100823100E https://hdl.handle.net/21.15107/rcub_dais_260 .
Elezović, Nevenka, Babić, Biljana M., Radmilović, Velimir R., Gajić Krstajić, Ljiljana, Krstajić, Nedeljko, Vračar, Ljiljana, "A novel platinum-based nanocatalyst at a niobia-doped titania support for the hydrogen oxidation reaction" in Journal of the Serbian Chemical Society, 76, no. 8 (2011):1139-1152, https://doi.org/10.2298/JSC100823100E ., https://hdl.handle.net/21.15107/rcub_dais_260 .