X-ray Absorption Spectroscopy Investigation of Platinum–Gadolinium Thin Films with Different Stoichiometry for the Oxygen Reduction Reaction
Alloys of platinum and lanthanides present a remarkable activity for the oxygen reduction reaction—both in the form of extended surfaces and nanoparticulate catalysts. Co-sputter-deposited thin film catalysts based on platinum and gadolinium show great oxygen reduction activity improvement over pure...
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| Format: | Article |
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MDPI AG
2020-08-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/10/9/978 |
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| author | Kim Degn Jensen Anders Filsøe Pedersen Eleonora Zamburlini Ifan Erfyl Lester Stephens Ib Chorkendorff María Escudero-Escribano |
| author_facet | Kim Degn Jensen Anders Filsøe Pedersen Eleonora Zamburlini Ifan Erfyl Lester Stephens Ib Chorkendorff María Escudero-Escribano |
| author_sort | Kim Degn Jensen |
| collection | DOAJ |
| description | Alloys of platinum and lanthanides present a remarkable activity for the oxygen reduction reaction—both in the form of extended surfaces and nanoparticulate catalysts. Co-sputter-deposited thin film catalysts based on platinum and gadolinium show great oxygen reduction activity improvement over pure Pt. The sputter-deposition technique represents a viable and versatile approach for investigating model catalyst systems with different compositions. In this work, co-sputtered Pt<sub>5</sub>Gd and Pt<sub>7.5</sub>Gd thin films were investigated using X-ray absorption spectroscopy as well as standardized electrochemical techniques. These investigations revealed the importance of forming alloys with specific stoichiometry, supporting the need of forming compressively strained Pt overlayers in order to achieve optimum catalytic performances. |
| first_indexed | 2024-03-10T16:41:55Z |
| format | Article |
| id | doaj.art-5c0209ddfe88487b9107c061a1a648f7 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T16:41:55Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-5c0209ddfe88487b9107c061a1a648f72023-11-20T11:56:58ZengMDPI AGCatalysts2073-43442020-08-0110997810.3390/catal10090978X-ray Absorption Spectroscopy Investigation of Platinum–Gadolinium Thin Films with Different Stoichiometry for the Oxygen Reduction ReactionKim Degn Jensen0Anders Filsøe Pedersen1Eleonora Zamburlini2Ifan Erfyl Lester Stephens3Ib Chorkendorff4María Escudero-Escribano5Department of Chemistry, Nano-Science Center, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, DenmarkDepartment of Physics, Surface Physics and Catalysis, Technical University of Denmark, Fysikvej, DK-2800 Lyngby, DenmarkDepartment of Physics, Surface Physics and Catalysis, Technical University of Denmark, Fysikvej, DK-2800 Lyngby, DenmarkDepartment of Physics, Surface Physics and Catalysis, Technical University of Denmark, Fysikvej, DK-2800 Lyngby, DenmarkDepartment of Physics, Surface Physics and Catalysis, Technical University of Denmark, Fysikvej, DK-2800 Lyngby, DenmarkDepartment of Chemistry, Nano-Science Center, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, DenmarkAlloys of platinum and lanthanides present a remarkable activity for the oxygen reduction reaction—both in the form of extended surfaces and nanoparticulate catalysts. Co-sputter-deposited thin film catalysts based on platinum and gadolinium show great oxygen reduction activity improvement over pure Pt. The sputter-deposition technique represents a viable and versatile approach for investigating model catalyst systems with different compositions. In this work, co-sputtered Pt<sub>5</sub>Gd and Pt<sub>7.5</sub>Gd thin films were investigated using X-ray absorption spectroscopy as well as standardized electrochemical techniques. These investigations revealed the importance of forming alloys with specific stoichiometry, supporting the need of forming compressively strained Pt overlayers in order to achieve optimum catalytic performances.https://www.mdpi.com/2073-4344/10/9/978X-ray absorption spectroscopyelectrocatalysisPt alloysthin filmsco-sputter depositionoxygen reduction reaction |
| spellingShingle | Kim Degn Jensen Anders Filsøe Pedersen Eleonora Zamburlini Ifan Erfyl Lester Stephens Ib Chorkendorff María Escudero-Escribano X-ray Absorption Spectroscopy Investigation of Platinum–Gadolinium Thin Films with Different Stoichiometry for the Oxygen Reduction Reaction Catalysts X-ray absorption spectroscopy electrocatalysis Pt alloys thin films co-sputter deposition oxygen reduction reaction |
| title | X-ray Absorption Spectroscopy Investigation of Platinum–Gadolinium Thin Films with Different Stoichiometry for the Oxygen Reduction Reaction |
| title_full | X-ray Absorption Spectroscopy Investigation of Platinum–Gadolinium Thin Films with Different Stoichiometry for the Oxygen Reduction Reaction |
| title_fullStr | X-ray Absorption Spectroscopy Investigation of Platinum–Gadolinium Thin Films with Different Stoichiometry for the Oxygen Reduction Reaction |
| title_full_unstemmed | X-ray Absorption Spectroscopy Investigation of Platinum–Gadolinium Thin Films with Different Stoichiometry for the Oxygen Reduction Reaction |
| title_short | X-ray Absorption Spectroscopy Investigation of Platinum–Gadolinium Thin Films with Different Stoichiometry for the Oxygen Reduction Reaction |
| title_sort | x ray absorption spectroscopy investigation of platinum gadolinium thin films with different stoichiometry for the oxygen reduction reaction |
| topic | X-ray absorption spectroscopy electrocatalysis Pt alloys thin films co-sputter deposition oxygen reduction reaction |
| url | https://www.mdpi.com/2073-4344/10/9/978 |
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