Dataset of "Different conditions, different composition: Reactive environment-induced surface composition dynamics in Pt-based bimetallic alloys"
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| Formato: | Recurso digital |
| Lenguaje: | inglés |
| Publicado: |
Zenodo
2026
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| _version_ | 1866901513094299648 |
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| author | Khalakhan, Ivan Bouzek, Karel Paušová, Šárka |
| author_facet | Khalakhan, Ivan Bouzek, Karel Paušová, Šárka |
| contents | In this study, we utilize near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) to monitor in real time, the redox-driven surface restructuring of model Pt–M alloys (M = Co, Ni, Cu) with systematically tailored compositions. Samples underwent sequential oxidative (5 mbar O₂) and reductive (5 mbar H₂) treatments across a temperature range from room temperature to 300°C, for real-time tracking of surface composition, oxidation states, and electronic structure as a functions of reactive environment, temperature, alloy type and stoichiometry. Results reveal that exposure to reactive gas atmospheres induces substantial surface dynamics. Overall, in oxidative atmospheres, the less noble component preferentially oxidized and segregated to the surface, triggering dealloying, while in subsequent reductive atmospheres, its reduction induces partial realloying with Pt. The extent and reversibility of these processes are discussed depending on alloy type and composition, providing insights into redox-driven surface dynamics and offer a basis for the rational design of durable, high-performance Pt-based multimetallic catalysts. |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_19680026 |
| institution | Zenodo |
| language | eng |
| publishDate | 2026 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Dataset of "Different conditions, different composition: Reactive environment-induced surface composition dynamics in Pt-based bimetallic alloys" Khalakhan, Ivan Bouzek, Karel Paušová, Šárka VZ2 UK 214021 Bimetallic alloys Oxidation Reduction Segregation Near-ambient pressure X-ray photoelectron spectroscopy In this study, we utilize near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) to monitor in real time, the redox-driven surface restructuring of model Pt–M alloys (M = Co, Ni, Cu) with systematically tailored compositions. Samples underwent sequential oxidative (5 mbar O₂) and reductive (5 mbar H₂) treatments across a temperature range from room temperature to 300°C, for real-time tracking of surface composition, oxidation states, and electronic structure as a functions of reactive environment, temperature, alloy type and stoichiometry. Results reveal that exposure to reactive gas atmospheres induces substantial surface dynamics. Overall, in oxidative atmospheres, the less noble component preferentially oxidized and segregated to the surface, triggering dealloying, while in subsequent reductive atmospheres, its reduction induces partial realloying with Pt. The extent and reversibility of these processes are discussed depending on alloy type and composition, providing insights into redox-driven surface dynamics and offer a basis for the rational design of durable, high-performance Pt-based multimetallic catalysts. |
| title | Dataset of "Different conditions, different composition: Reactive environment-induced surface composition dynamics in Pt-based bimetallic alloys" |
| topic | VZ2 UK 214021 Bimetallic alloys Oxidation Reduction Segregation Near-ambient pressure X-ray photoelectron spectroscopy |
| url | https://doi.org/10.5281/zenodo.19680026 |