Effect of chemisorbed CO on MoOx-Pt/C electrode on the kinetics of hydrogen oxidation reaction
Само за регистроване кориснике
2010
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The influence of poisoning of MoOx-Pt catalyst by CO on the kinetics of H2 oxidation reaction (HOR) at MoOx-Pt electrode in 0.5 mol dm-3 HClO4 saturated with H 2 containing 100 ppm CO, was examined on rotating disc electrode (RDE) at 25 °C. MoOx-Pt nano-catalyst prepared by the polyole method combined with MoOx post-deposition was supported on commercial carbon black, Vulcan XC-72. The MoOx-Pt/C catalyst was characterized by TEM technique. The catalyst composition is very similar to the nominal one and post-deposited MoOx species block only a small fraction of the active Pt particle surface area. MoOx deposition on the carbon support can be ruled out from the EDAX results and from the low mobility of these oxides under used conditions. Based on Tafel-Heyrovsky-Volmer mechanism the corresponding kinetic equations from a dual-pathway model were derived to describe oxidation current-potential behavior on RDE over entire potential range, at various CO coverages. The polarization RDE curves... were fitted with derived polarization equations according to the proposed model. The fitting showed that the HOR proceeded most likely via the Tafel-Volmer (TV) pathway. A very high electrocatalytic activity observed at MoOx-Pt catalyst for the hydrogen oxidation reaction in the presence of 100 ppm CO is achieved through chemical surface reaction of adsorbed CO with Mo surface oxides. © 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
Кључне речи:
CO adsorption / hydrogen oxidation / kinetic equation / mechanism / RDEИзвор:
International Journal of Hydrogen Energy, 2010, 35, 23, 12878-12887Издавач:
- Elsevier
Финансирање / пројекти:
- Синтеза, карактеризација и примена наноструктуираних катализатора на различитим носачима у горивним спреговима, електролизи воде и електроорганској синтези (RS-MESTD-MPN2006-2010-142038)
DOI: 10.1016/j.ijhydene.2010.09.004
ISSN: 0360-3199
WoS: 000284743900021
Scopus: 2-s2.0-78049480820
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Elezović, Nevenka AU - Gajić Krstajić, Ljiljana AU - Vračar, Ljiljana AU - Krstajić, Nedeljko PY - 2010 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5591 AB - The influence of poisoning of MoOx-Pt catalyst by CO on the kinetics of H2 oxidation reaction (HOR) at MoOx-Pt electrode in 0.5 mol dm-3 HClO4 saturated with H 2 containing 100 ppm CO, was examined on rotating disc electrode (RDE) at 25 °C. MoOx-Pt nano-catalyst prepared by the polyole method combined with MoOx post-deposition was supported on commercial carbon black, Vulcan XC-72. The MoOx-Pt/C catalyst was characterized by TEM technique. The catalyst composition is very similar to the nominal one and post-deposited MoOx species block only a small fraction of the active Pt particle surface area. MoOx deposition on the carbon support can be ruled out from the EDAX results and from the low mobility of these oxides under used conditions. Based on Tafel-Heyrovsky-Volmer mechanism the corresponding kinetic equations from a dual-pathway model were derived to describe oxidation current-potential behavior on RDE over entire potential range, at various CO coverages. The polarization RDE curves were fitted with derived polarization equations according to the proposed model. The fitting showed that the HOR proceeded most likely via the Tafel-Volmer (TV) pathway. A very high electrocatalytic activity observed at MoOx-Pt catalyst for the hydrogen oxidation reaction in the presence of 100 ppm CO is achieved through chemical surface reaction of adsorbed CO with Mo surface oxides. © 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved. PB - Elsevier T2 - International Journal of Hydrogen Energy T2 - International Journal of Hydrogen Energy T1 - Effect of chemisorbed CO on MoOx-Pt/C electrode on the kinetics of hydrogen oxidation reaction EP - 12887 IS - 23 SP - 12878 VL - 35 DO - 10.1016/j.ijhydene.2010.09.004 UR - https://hdl.handle.net/21.15107/rcub_dais_3410 ER -
@article{ author = "Elezović, Nevenka and Gajić Krstajić, Ljiljana and Vračar, Ljiljana and Krstajić, Nedeljko", year = "2010", abstract = "The influence of poisoning of MoOx-Pt catalyst by CO on the kinetics of H2 oxidation reaction (HOR) at MoOx-Pt electrode in 0.5 mol dm-3 HClO4 saturated with H 2 containing 100 ppm CO, was examined on rotating disc electrode (RDE) at 25 °C. MoOx-Pt nano-catalyst prepared by the polyole method combined with MoOx post-deposition was supported on commercial carbon black, Vulcan XC-72. The MoOx-Pt/C catalyst was characterized by TEM technique. The catalyst composition is very similar to the nominal one and post-deposited MoOx species block only a small fraction of the active Pt particle surface area. MoOx deposition on the carbon support can be ruled out from the EDAX results and from the low mobility of these oxides under used conditions. Based on Tafel-Heyrovsky-Volmer mechanism the corresponding kinetic equations from a dual-pathway model were derived to describe oxidation current-potential behavior on RDE over entire potential range, at various CO coverages. The polarization RDE curves were fitted with derived polarization equations according to the proposed model. The fitting showed that the HOR proceeded most likely via the Tafel-Volmer (TV) pathway. A very high electrocatalytic activity observed at MoOx-Pt catalyst for the hydrogen oxidation reaction in the presence of 100 ppm CO is achieved through chemical surface reaction of adsorbed CO with Mo surface oxides. © 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.", publisher = "Elsevier", journal = "International Journal of Hydrogen Energy, International Journal of Hydrogen Energy", title = "Effect of chemisorbed CO on MoOx-Pt/C electrode on the kinetics of hydrogen oxidation reaction", pages = "12887-12878", number = "23", volume = "35", doi = "10.1016/j.ijhydene.2010.09.004", url = "https://hdl.handle.net/21.15107/rcub_dais_3410" }
Elezović, N., Gajić Krstajić, L., Vračar, L.,& Krstajić, N.. (2010). Effect of chemisorbed CO on MoOx-Pt/C electrode on the kinetics of hydrogen oxidation reaction. in International Journal of Hydrogen Energy Elsevier., 35(23), 12878-12887. https://doi.org/10.1016/j.ijhydene.2010.09.004 https://hdl.handle.net/21.15107/rcub_dais_3410
Elezović N, Gajić Krstajić L, Vračar L, Krstajić N. Effect of chemisorbed CO on MoOx-Pt/C electrode on the kinetics of hydrogen oxidation reaction. in International Journal of Hydrogen Energy. 2010;35(23):12878-12887. doi:10.1016/j.ijhydene.2010.09.004 https://hdl.handle.net/21.15107/rcub_dais_3410 .
Elezović, Nevenka, Gajić Krstajić, Ljiljana, Vračar, Ljiljana, Krstajić, Nedeljko, "Effect of chemisorbed CO on MoOx-Pt/C electrode on the kinetics of hydrogen oxidation reaction" in International Journal of Hydrogen Energy, 35, no. 23 (2010):12878-12887, https://doi.org/10.1016/j.ijhydene.2010.09.004 ., https://hdl.handle.net/21.15107/rcub_dais_3410 .