Study of the kinetics and the influence of Bi-irr, on formic acid oxidation at Pt2RU3/C
Само за регистроване кориснике
2007
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Electrochemical oxidation of HCOOH in H2SO4 and HCIO4 solutions was examined on thin film Pt2RU3/C electrode. XRD pattern revealed that Pt2RU3 alloy consisted of the solid solution of Ru in Pt and the small amount of Ru or solid solution of Pt in Ru. According to STM images, Pt2RU3 particles size was between 2 and 6 nm. It was established that electrochemical oxidation of HCOOH commenced at -0.1 V versus SCE at Pt sites in the catalyst. Kinetic parameters indicated that dehydrogenation path was predominant. Dehydration occurs in parallel, but without significant poisoning by COad dowing to oxidative removal by OH species on Ru atoms. The coverage Of Pt2RU3 surface by CO preadsorbed from the solution was found to be 24% lower when the surface was modified by irreversibly adsorbed Bi. Modification by Bi also shifted the onset potential for HCOOH oxidation for about 50 m V towards more negative values and consequently, increased the reaction rate for a factor of two. It was proposed that ...Ru acts through bifunctional mechanism, i.e. OH species adsorbed on Ru oxidizes COad from Pt sites, while Bi hinders the adsorption of CO on Pt sites via electronic and/or ensemble effects.
Кључне речи:
formic acid / electrochemical oxidation / platinum-ruthenium / bismuth / supported nanocatalyst / fuel cellsИзвор:
Electrochimica Acta, 2007, 53, 2, 887-893Издавач:
- Pergamon-Elsevier Science Ltd, Oxford
Финансирање / пројекти:
- Нови материјали за примену у горивим спреговима са полимерном мембраном (RS-MESTD-MPN2006-2010-142056)
DOI: 10.1016/j.electacta.2007.07.073
ISSN: 0013-4686
WoS: 000251480900081
Scopus: 2-s2.0-35148896864
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Tripković, Amalija AU - Gojković, Snežana Lj. AU - Popović, Ksenija AU - Lović, Jelena AU - Kowal, Andrzej PY - 2007 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1147 AB - Electrochemical oxidation of HCOOH in H2SO4 and HCIO4 solutions was examined on thin film Pt2RU3/C electrode. XRD pattern revealed that Pt2RU3 alloy consisted of the solid solution of Ru in Pt and the small amount of Ru or solid solution of Pt in Ru. According to STM images, Pt2RU3 particles size was between 2 and 6 nm. It was established that electrochemical oxidation of HCOOH commenced at -0.1 V versus SCE at Pt sites in the catalyst. Kinetic parameters indicated that dehydrogenation path was predominant. Dehydration occurs in parallel, but without significant poisoning by COad dowing to oxidative removal by OH species on Ru atoms. The coverage Of Pt2RU3 surface by CO preadsorbed from the solution was found to be 24% lower when the surface was modified by irreversibly adsorbed Bi. Modification by Bi also shifted the onset potential for HCOOH oxidation for about 50 m V towards more negative values and consequently, increased the reaction rate for a factor of two. It was proposed that Ru acts through bifunctional mechanism, i.e. OH species adsorbed on Ru oxidizes COad from Pt sites, while Bi hinders the adsorption of CO on Pt sites via electronic and/or ensemble effects. PB - Pergamon-Elsevier Science Ltd, Oxford T2 - Electrochimica Acta T1 - Study of the kinetics and the influence of Bi-irr, on formic acid oxidation at Pt2RU3/C EP - 893 IS - 2 SP - 887 VL - 53 DO - 10.1016/j.electacta.2007.07.073 ER -
@article{ author = "Tripković, Amalija and Gojković, Snežana Lj. and Popović, Ksenija and Lović, Jelena and Kowal, Andrzej", year = "2007", abstract = "Electrochemical oxidation of HCOOH in H2SO4 and HCIO4 solutions was examined on thin film Pt2RU3/C electrode. XRD pattern revealed that Pt2RU3 alloy consisted of the solid solution of Ru in Pt and the small amount of Ru or solid solution of Pt in Ru. According to STM images, Pt2RU3 particles size was between 2 and 6 nm. It was established that electrochemical oxidation of HCOOH commenced at -0.1 V versus SCE at Pt sites in the catalyst. Kinetic parameters indicated that dehydrogenation path was predominant. Dehydration occurs in parallel, but without significant poisoning by COad dowing to oxidative removal by OH species on Ru atoms. The coverage Of Pt2RU3 surface by CO preadsorbed from the solution was found to be 24% lower when the surface was modified by irreversibly adsorbed Bi. Modification by Bi also shifted the onset potential for HCOOH oxidation for about 50 m V towards more negative values and consequently, increased the reaction rate for a factor of two. It was proposed that Ru acts through bifunctional mechanism, i.e. OH species adsorbed on Ru oxidizes COad from Pt sites, while Bi hinders the adsorption of CO on Pt sites via electronic and/or ensemble effects.", publisher = "Pergamon-Elsevier Science Ltd, Oxford", journal = "Electrochimica Acta", title = "Study of the kinetics and the influence of Bi-irr, on formic acid oxidation at Pt2RU3/C", pages = "893-887", number = "2", volume = "53", doi = "10.1016/j.electacta.2007.07.073" }
Tripković, A., Gojković, S. Lj., Popović, K., Lović, J.,& Kowal, A.. (2007). Study of the kinetics and the influence of Bi-irr, on formic acid oxidation at Pt2RU3/C. in Electrochimica Acta Pergamon-Elsevier Science Ltd, Oxford., 53(2), 887-893. https://doi.org/10.1016/j.electacta.2007.07.073
Tripković A, Gojković SL, Popović K, Lović J, Kowal A. Study of the kinetics and the influence of Bi-irr, on formic acid oxidation at Pt2RU3/C. in Electrochimica Acta. 2007;53(2):887-893. doi:10.1016/j.electacta.2007.07.073 .
Tripković, Amalija, Gojković, Snežana Lj., Popović, Ksenija, Lović, Jelena, Kowal, Andrzej, "Study of the kinetics and the influence of Bi-irr, on formic acid oxidation at Pt2RU3/C" in Electrochimica Acta, 53, no. 2 (2007):887-893, https://doi.org/10.1016/j.electacta.2007.07.073 . .