TiO2 doped by 0.5% Nb was synthesized by the acid-catalyzed sol-gel method. BET surface area was determined to be 72 m(2) g(-1). XRD measurements showed that TiO2 has structure of anatase with similar to 13 nm average crystallite size. Using Nb-TiO2 as a support, Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 were prepared by borohydride reduction method. TEM imaging of Pt-Ru/Nb-TiO2 revealed rather uniform distribution of the metallic particles on the support with a mean diameter of 3.8 nm. According to XRD analysis, Pt-Ru particles consist of the solid solution of Ru in Pt (40 at.% Ru) and a small amount of RuO2. Cyclic voltammetry of Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 indicated good conductivity of the supporting material. Oxidation of pre-adsorbed CO and methanol on Pt-Ru/Nb-TiO2 was faster than on Pt/Nb-TiO2. However, when the activities of Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 for methanol oxidation were compared to those of Pt/XC-72 and Pt-Ru/XC-72, no significant difference was observed. This means that Nb-TiO...2 is a promising replacement for high area carbon supports in PEMFC anodes, but without the influence on the reaction kinetics.
TY - JOUR
AU - Gojković, Snežana
AU - Babić, Biljana M.
AU - Radmilović, Velimir R.
AU - Krstajić, Nedeljko V.
PY - 2010
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1674
AB - TiO2 doped by 0.5% Nb was synthesized by the acid-catalyzed sol-gel method. BET surface area was determined to be 72 m(2) g(-1). XRD measurements showed that TiO2 has structure of anatase with similar to 13 nm average crystallite size. Using Nb-TiO2 as a support, Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 were prepared by borohydride reduction method. TEM imaging of Pt-Ru/Nb-TiO2 revealed rather uniform distribution of the metallic particles on the support with a mean diameter of 3.8 nm. According to XRD analysis, Pt-Ru particles consist of the solid solution of Ru in Pt (40 at.% Ru) and a small amount of RuO2. Cyclic voltammetry of Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 indicated good conductivity of the supporting material. Oxidation of pre-adsorbed CO and methanol on Pt-Ru/Nb-TiO2 was faster than on Pt/Nb-TiO2. However, when the activities of Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 for methanol oxidation were compared to those of Pt/XC-72 and Pt-Ru/XC-72, no significant difference was observed. This means that Nb-TiO2 is a promising replacement for high area carbon supports in PEMFC anodes, but without the influence on the reaction kinetics.
PB - Elsevier Science Sa, Lausanne
T2 - Journal of Electroanalytical Chemistry
T1 - Nb-doped TiO2 as a support of Pt and Pt-Ru anode catalyst for PEMFCs
EP - 166
IS - 1-2
SP - 161
VL - 639
DO - 10.1016/j.jelechem.2009.12.004
ER -
@article{
author = "Gojković, Snežana and Babić, Biljana M. and Radmilović, Velimir R. and Krstajić, Nedeljko V.",
year = "2010",
abstract = "TiO2 doped by 0.5% Nb was synthesized by the acid-catalyzed sol-gel method. BET surface area was determined to be 72 m(2) g(-1). XRD measurements showed that TiO2 has structure of anatase with similar to 13 nm average crystallite size. Using Nb-TiO2 as a support, Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 were prepared by borohydride reduction method. TEM imaging of Pt-Ru/Nb-TiO2 revealed rather uniform distribution of the metallic particles on the support with a mean diameter of 3.8 nm. According to XRD analysis, Pt-Ru particles consist of the solid solution of Ru in Pt (40 at.% Ru) and a small amount of RuO2. Cyclic voltammetry of Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 indicated good conductivity of the supporting material. Oxidation of pre-adsorbed CO and methanol on Pt-Ru/Nb-TiO2 was faster than on Pt/Nb-TiO2. However, when the activities of Pt/Nb-TiO2 and Pt-Ru/Nb-TiO2 for methanol oxidation were compared to those of Pt/XC-72 and Pt-Ru/XC-72, no significant difference was observed. This means that Nb-TiO2 is a promising replacement for high area carbon supports in PEMFC anodes, but without the influence on the reaction kinetics.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Electroanalytical Chemistry",
title = "Nb-doped TiO2 as a support of Pt and Pt-Ru anode catalyst for PEMFCs",
pages = "166-161",
number = "1-2",
volume = "639",
doi = "10.1016/j.jelechem.2009.12.004"
}
Gojković, S., Babić, B. M., Radmilović, V. R.,& Krstajić, N. V.. (2010). Nb-doped TiO2 as a support of Pt and Pt-Ru anode catalyst for PEMFCs. in Journal of Electroanalytical Chemistry
Elsevier Science Sa, Lausanne., 639(1-2), 161-166.
https://doi.org/10.1016/j.jelechem.2009.12.004
Gojković S, Babić BM, Radmilović VR, Krstajić NV. Nb-doped TiO2 as a support of Pt and Pt-Ru anode catalyst for PEMFCs. in Journal of Electroanalytical Chemistry. 2010;639(1-2):161-166.
doi:10.1016/j.jelechem.2009.12.004 .
Gojković, Snežana, Babić, Biljana M., Radmilović, Velimir R., Krstajić, Nedeljko V., "Nb-doped TiO2 as a support of Pt and Pt-Ru anode catalyst for PEMFCs" in Journal of Electroanalytical Chemistry, 639, no. 1-2 (2010):161-166,
https://doi.org/10.1016/j.jelechem.2009.12.004 . .
