Pt/C catalyst impregnated with tungsten-oxide – Hydrogen oxidation reaction vs. CO tolerance
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2019
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Hydrogen Oxidation Reaction (HOR) is anode reaction in Proton exchange membrane fuel cells (PEMFCs) and it has very fast kinetics. However, the purity of fuel (H 2 ) is very important and can slow down HOR kinetics, affecting the overall PEMFC performance. The performance of commercial Pt/C catalyst impregnated with WO x, as a catalyst for HOR, was investigated using a set of electrochemical methods (cyclic voltammetry, linear scan voltammetry and rotating disk electrode voltammetry). In order to deepen the understanding how WO x species can contribute CO tolerance of Pt/C, a particular attention was paid to CO poisoning. In the absence of CO, HOR is under diffusion limitations and HOR kinetics is not affected by WO x species. Appreciable HOR current on the electrodes pre-saturated with CO ads at potentials above 0.3 V vs. RHE, which is not observed for pure Pt/C, was discussed in details. HOR liming diffusion currents for higher concentrations of W are reached at high anodic potential...s. The obtained results were explained by donation of OH ads by WO x phase for CO ads removal in the mid potential region and reduced reactivity of Pt surface sites in the vicinity of the Pt|WO x interface. The obtained results can provide guidelines for development of novel CO tolerant PEMFC anode catalysts. © 2019 Hydrogen Energy Publications LLC
Ključne reči:
Pt/C catalysts / Tungsten oxide / CO tolerance / Hydrogen oxidation reaction / PEMFCIzvor:
International Journal of Hydrogen Energy, 2019, 44, 26, 13364-13372Finansiranje / projekti:
- Vodonična energija - razvoj novih materijala: elektrolitičko dobijanje vodonika, vodonične gorivne ćelije, izotopski efekti (RS-172045)
- Litijum-jon baterije i gorivne ćelije-istraživanje i razvoj (RS-45014)
DOI: 10.1016/j.ijhydene.2019.03.270
ISSN: 0360-3199; 1879-3487
WoS: 000470051300043
Scopus: 2-s2.0-85064432544
URI
https://linkinghub.elsevier.com/retrieve/pii/S0360319919313576https://vinar.vin.bg.ac.rs/handle/123456789/8150
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Brković, Snežana M. AU - Nikolić, Vladimir M. AU - Marčeta Kaninski, Milica AU - Pašti, Igor A. PY - 2019 UR - https://linkinghub.elsevier.com/retrieve/pii/S0360319919313576 UR - https://vinar.vin.bg.ac.rs/handle/123456789/8150 AB - Hydrogen Oxidation Reaction (HOR) is anode reaction in Proton exchange membrane fuel cells (PEMFCs) and it has very fast kinetics. However, the purity of fuel (H 2 ) is very important and can slow down HOR kinetics, affecting the overall PEMFC performance. The performance of commercial Pt/C catalyst impregnated with WO x, as a catalyst for HOR, was investigated using a set of electrochemical methods (cyclic voltammetry, linear scan voltammetry and rotating disk electrode voltammetry). In order to deepen the understanding how WO x species can contribute CO tolerance of Pt/C, a particular attention was paid to CO poisoning. In the absence of CO, HOR is under diffusion limitations and HOR kinetics is not affected by WO x species. Appreciable HOR current on the electrodes pre-saturated with CO ads at potentials above 0.3 V vs. RHE, which is not observed for pure Pt/C, was discussed in details. HOR liming diffusion currents for higher concentrations of W are reached at high anodic potentials. The obtained results were explained by donation of OH ads by WO x phase for CO ads removal in the mid potential region and reduced reactivity of Pt surface sites in the vicinity of the Pt|WO x interface. The obtained results can provide guidelines for development of novel CO tolerant PEMFC anode catalysts. © 2019 Hydrogen Energy Publications LLC T2 - International Journal of Hydrogen Energy T1 - Pt/C catalyst impregnated with tungsten-oxide – Hydrogen oxidation reaction vs. CO tolerance VL - 44 IS - 26 SP - 13364 EP - 13372 DO - 10.1016/j.ijhydene.2019.03.270 ER -
@article{ author = "Brković, Snežana M. and Nikolić, Vladimir M. and Marčeta Kaninski, Milica and Pašti, Igor A.", year = "2019", abstract = "Hydrogen Oxidation Reaction (HOR) is anode reaction in Proton exchange membrane fuel cells (PEMFCs) and it has very fast kinetics. However, the purity of fuel (H 2 ) is very important and can slow down HOR kinetics, affecting the overall PEMFC performance. The performance of commercial Pt/C catalyst impregnated with WO x, as a catalyst for HOR, was investigated using a set of electrochemical methods (cyclic voltammetry, linear scan voltammetry and rotating disk electrode voltammetry). In order to deepen the understanding how WO x species can contribute CO tolerance of Pt/C, a particular attention was paid to CO poisoning. In the absence of CO, HOR is under diffusion limitations and HOR kinetics is not affected by WO x species. Appreciable HOR current on the electrodes pre-saturated with CO ads at potentials above 0.3 V vs. RHE, which is not observed for pure Pt/C, was discussed in details. HOR liming diffusion currents for higher concentrations of W are reached at high anodic potentials. The obtained results were explained by donation of OH ads by WO x phase for CO ads removal in the mid potential region and reduced reactivity of Pt surface sites in the vicinity of the Pt|WO x interface. The obtained results can provide guidelines for development of novel CO tolerant PEMFC anode catalysts. © 2019 Hydrogen Energy Publications LLC", journal = "International Journal of Hydrogen Energy", title = "Pt/C catalyst impregnated with tungsten-oxide – Hydrogen oxidation reaction vs. CO tolerance", volume = "44", number = "26", pages = "13364-13372", doi = "10.1016/j.ijhydene.2019.03.270" }
Brković, S. M., Nikolić, V. M., Marčeta Kaninski, M.,& Pašti, I. A.. (2019). Pt/C catalyst impregnated with tungsten-oxide – Hydrogen oxidation reaction vs. CO tolerance. in International Journal of Hydrogen Energy, 44(26), 13364-13372. https://doi.org/10.1016/j.ijhydene.2019.03.270
Brković SM, Nikolić VM, Marčeta Kaninski M, Pašti IA. Pt/C catalyst impregnated with tungsten-oxide – Hydrogen oxidation reaction vs. CO tolerance. in International Journal of Hydrogen Energy. 2019;44(26):13364-13372. doi:10.1016/j.ijhydene.2019.03.270 .
Brković, Snežana M., Nikolić, Vladimir M., Marčeta Kaninski, Milica, Pašti, Igor A., "Pt/C catalyst impregnated with tungsten-oxide – Hydrogen oxidation reaction vs. CO tolerance" in International Journal of Hydrogen Energy, 44, no. 26 (2019):13364-13372, https://doi.org/10.1016/j.ijhydene.2019.03.270 . .