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Kinetic study of the hydrogen oxidation reaction on sub-stoichiometric titanium oxide-supported platinum electrocatalyst in acid solution

Authorized Users Only
2009
Authors
Babić, Biljana M.
Gulicovski, Jelena
Gajić Krstajić, Ljiljana
Elezović, Nevenka
Radmilović, Velimir R.
Krstajić, Nedeljko
Vračar, Ljiljana
Article (Published version)
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Abstract
The kinetics and mechanism of the hydrogen oxidation reaction were studied in 0.5 mol dm-3 HClO4 solution on an electrode based on titanium oxide with Magneli phase structure-supported platinum electrocatalyst applied on rotation Au disk electrode. Pt catalyst was prepared by impregnation method from 2-propanol solution of Pt(NH3)2(NO2)2 and sub-stoichiometric titanium oxide powder. Sub-stiochiometric titanium oxide support was characterized by X-ray diffraction and BET techniques. The synthesized catalyst was analyzed by TEM technique. Based on Tafel-Heyrovsky-Volmer mechanism the corresponding kinetic equations were derived to describe the hydrogen oxidation current-potential behavior on RDE over the entire potential region. The polarization RDE curves were fitted with derived polarization equations according to proposed model. The fitting shows that the HOR on Pt proceeds most likely via the Tafel-Volmer (TV) pathway in the lower potential region, while the Heyrovsky-Volmer (HV) pat...hway is operative in the higher potential region. It is pointed out that Tafel equation that has been frequently used for the kinetics analysis in the HOR, can not reproduce the polarization curves measured with high mass-transport rates. Polarization measurements on RDE revealed that the Pt catalyst deposited on titanium suboxide support showed equal specific activity for the HOR compared to conventional carbon-supported Pt fuel cell catalyst. © 2008 Elsevier B.V. All rights reserved.

Keywords:
kinetic equation / mechanism / hydrogen oxidation reaction / titanium sub-oxide
Source:
Journal of Power Sources, 2009, 193, 1, 99-106
Publisher:
  • Elsevier
Projects:
  • Sinteza, karakterizacija i primena nanostruktuiranih katalizatora na različitim nosačima u gorivnim spregovima, elektrolizi vode i elektroorganskoj sintezi (RS-142038)

DOI: 10.1016/j.jpowsour.2008.11.142

ISSN: 0378-7753

WoS: 000267561400014

Scopus: 2-s2.0-66849124847
[ Google Scholar ]
14
12
URI
http://dais.sanu.ac.rs/123456789/3480
Collections
  • ITN SANU - Opšta kolekcija / ITS SASA - General collection
Institution
Институт техничких наука САНУ / Institute of Technical Sciences of SASA
TY  - JOUR
AU  - Babić, Biljana M.
AU  - Gulicovski, Jelena
AU  - Gajić Krstajić, Ljiljana
AU  - Elezović, Nevenka
AU  - Radmilović, Velimir R.
AU  - Krstajić, Nedeljko
AU  - Vračar, Ljiljana
PY  - 2009
UR  - http://dais.sanu.ac.rs/123456789/3480
AB  - The kinetics and mechanism of the hydrogen oxidation reaction were studied in 0.5 mol dm-3 HClO4 solution on an electrode based on titanium oxide with Magneli phase structure-supported platinum electrocatalyst applied on rotation Au disk electrode. Pt catalyst was prepared by impregnation method from 2-propanol solution of Pt(NH3)2(NO2)2 and sub-stoichiometric titanium oxide powder. Sub-stiochiometric titanium oxide support was characterized by X-ray diffraction and BET techniques. The synthesized catalyst was analyzed by TEM technique. Based on Tafel-Heyrovsky-Volmer mechanism the corresponding kinetic equations were derived to describe the hydrogen oxidation current-potential behavior on RDE over the entire potential region. The polarization RDE curves were fitted with derived polarization equations according to proposed model. The fitting shows that the HOR on Pt proceeds most likely via the Tafel-Volmer (TV) pathway in the lower potential region, while the Heyrovsky-Volmer (HV) pathway is operative in the higher potential region. It is pointed out that Tafel equation that has been frequently used for the kinetics analysis in the HOR, can not reproduce the polarization curves measured with high mass-transport rates. Polarization measurements on RDE revealed that the Pt catalyst deposited on titanium suboxide support showed equal specific activity for the HOR compared to conventional carbon-supported Pt fuel cell catalyst. © 2008 Elsevier B.V. All rights reserved.
PB  - Elsevier
T2  - Journal of Power Sources
T1  - Kinetic study of the hydrogen oxidation reaction on sub-stoichiometric titanium oxide-supported platinum electrocatalyst in acid solution
SP  - 99
EP  - 106
VL  - 193
IS  - 1
DO  - 10.1016/j.jpowsour.2008.11.142
ER  - 
@article{
author = "Babić, Biljana M. and Gulicovski, Jelena and Gajić Krstajić, Ljiljana and Elezović, Nevenka and Radmilović, Velimir R. and Krstajić, Nedeljko and Vračar, Ljiljana",
year = "2009",
url = "http://dais.sanu.ac.rs/123456789/3480",
abstract = "The kinetics and mechanism of the hydrogen oxidation reaction were studied in 0.5 mol dm-3 HClO4 solution on an electrode based on titanium oxide with Magneli phase structure-supported platinum electrocatalyst applied on rotation Au disk electrode. Pt catalyst was prepared by impregnation method from 2-propanol solution of Pt(NH3)2(NO2)2 and sub-stoichiometric titanium oxide powder. Sub-stiochiometric titanium oxide support was characterized by X-ray diffraction and BET techniques. The synthesized catalyst was analyzed by TEM technique. Based on Tafel-Heyrovsky-Volmer mechanism the corresponding kinetic equations were derived to describe the hydrogen oxidation current-potential behavior on RDE over the entire potential region. The polarization RDE curves were fitted with derived polarization equations according to proposed model. The fitting shows that the HOR on Pt proceeds most likely via the Tafel-Volmer (TV) pathway in the lower potential region, while the Heyrovsky-Volmer (HV) pathway is operative in the higher potential region. It is pointed out that Tafel equation that has been frequently used for the kinetics analysis in the HOR, can not reproduce the polarization curves measured with high mass-transport rates. Polarization measurements on RDE revealed that the Pt catalyst deposited on titanium suboxide support showed equal specific activity for the HOR compared to conventional carbon-supported Pt fuel cell catalyst. © 2008 Elsevier B.V. All rights reserved.",
publisher = "Elsevier",
journal = "Journal of Power Sources",
title = "Kinetic study of the hydrogen oxidation reaction on sub-stoichiometric titanium oxide-supported platinum electrocatalyst in acid solution",
pages = "99-106",
volume = "193",
number = "1",
doi = "10.1016/j.jpowsour.2008.11.142"
}
Babić BM, Gulicovski J, Gajić Krstajić L, Elezović N, Radmilović VR, Krstajić N, Vračar L. Kinetic study of the hydrogen oxidation reaction on sub-stoichiometric titanium oxide-supported platinum electrocatalyst in acid solution. Journal of Power Sources. 2009;193(1):99-106
Babić, B. M., Gulicovski, J., Gajić Krstajić, L., Elezović, N., Radmilović, V. R., Krstajić, N.,& Vračar, L. (2009). Kinetic study of the hydrogen oxidation reaction on sub-stoichiometric titanium oxide-supported platinum electrocatalyst in acid solution.
Journal of Power SourcesElsevier., 193(1), 99-106. 
https://doi.org/10.1016/j.jpowsour.2008.11.142
Babić Biljana M., Gulicovski Jelena, Gajić Krstajić Ljiljana, Elezović Nevenka, Radmilović Velimir R., Krstajić Nedeljko, Vračar Ljiljana, "Kinetic study of the hydrogen oxidation reaction on sub-stoichiometric titanium oxide-supported platinum electrocatalyst in acid solution" 193, no. 1 (2009):99-106,
https://doi.org/10.1016/j.jpowsour.2008.11.142 .

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