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Xie X, Briega-Martos V, Farris R, Dopita M, Vorokhta M, Skála T, Matolínová I, Neyman KM, Cherevko S, Khalakhan I. Optimal Pt-Au Alloying for Efficient and Stable Oxygen Reduction Reaction Catalysts. ACS APPLIED MATERIALS & INTERFACES 2023; 15:1192-1200. [PMID: 36578102 DOI: 10.1021/acsami.2c18655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Stabilization of cathode catalysts in hydrogen-fueled proton-exchange membrane fuel cells (PEMFCs) is paramount to their widespread commercialization. Targeting that aim, Pt-Au alloy catalysts with various compositions (Pt95Au5, Pt90Au10, and Pt80Au20) prepared by magnetron sputtering were investigated. The promising stability improvement of the Pt-Au catalyst, manifested in suppressed platinum dissolution with increasing Au content, was documented over an extended potential range up to 1.5 VRHE. On the other hand, at elevated concentrations, Au showed a detrimental effect on oxygen reduction reaction activity. A systematic study involving complementary characterization techniques, electrochemistry, and Monte Carlo simulations based on density functional theory data enabled us to gain a comprehensive understanding of the composition-activity-stability relationship to find optimal Pt-Au alloying for maintaining the activity of platinum and improving its resistance to dissolution. According to the results, Pt-Au alloy with 10% gold represent the most promising composition retaining the activity of monometallic Pt while suppressing Pt dissolution by 50% at the upper potential limit of 1.2 VRHE and by 20% at devastating 1.5 VRHE.
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Affiliation(s)
- Xianxian Xie
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, V Holešovičkách 2, Prague 8 18000, Czech Republic
| | - Valentín Briega-Martos
- Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstr. 1, Erlangen 91058, Germany
| | - Riccardo Farris
- Departament de Ciència de Materials i Química Física & Institut de Quimica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martí i Franquès 1, Barcelona 08028, Spain
| | - Milan Dopita
- Faculty of Mathematics and Physics, Department of Condensed Matter Physics, Charles University, Ke Karlovu 5, Prague 2 12116, Czech Republic
| | - Mykhailo Vorokhta
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, V Holešovičkách 2, Prague 8 18000, Czech Republic
| | - Tomáš Skála
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, V Holešovičkách 2, Prague 8 18000, Czech Republic
| | - Iva Matolínová
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, V Holešovičkách 2, Prague 8 18000, Czech Republic
| | - Konstantin M Neyman
- Departament de Ciència de Materials i Química Física & Institut de Quimica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martí i Franquès 1, Barcelona 08028, Spain
- ICREA (Institució Catalana de Recerca i Estudis Avançats), Barcelona 08010, Spain
| | - Serhiy Cherevko
- Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstr. 1, Erlangen 91058, Germany
| | - Ivan Khalakhan
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, V Holešovičkách 2, Prague 8 18000, Czech Republic
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Wei R, Tang N, Jiang L, Yang J, Guo J, Yuan X, Liang J, Zhu Y, Wu Z, Li H. Bimetallic nanoparticles meet polymeric carbon nitride: Fabrications, catalytic applications and perspectives. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214500] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Stepanova L, Belskaya O, Trenikhin M, Leont’eva N, Gulyaeva T, Likholobov V. Effect of Pt(Au)/MgAlOx catalysts composition on their properties in the propane dehydrogenation. Catal Today 2021. [DOI: 10.1016/j.cattod.2021.04.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Wen X, Yin S, Yin H, Ding Y. A displacement dealloying route to dilute nanoporous PtAu alloys for highly active formic acid electro-oxidation. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.137884] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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