Platinum–Dysprosium Alloys as Oxygen Electrodes in Alkaline Media: An Experimental and Theoretical Study
Platinum–dysprosium (Pt–Dy) alloys prepared by the arc melting technique are assessed as potential electrodes for the oxygen reduction reaction (ORR) using voltammetry and chronoamperometry in alkaline media. A relatively small change (10 at.%) in the alloy composition brought a notable difference i...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-07-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/14/2318 |
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| author | Jadranka Milikić Nikola Nikolić Diogo M. F. Santos Daniele Macciò Adriana Saccone Mabkhoot Alsaiari Mohammed Jalalah M. Faisal Farid A. Harraz Yizhao Li Abu Bakr Nassr Igor Pašti Biljana Šljukić |
| author_facet | Jadranka Milikić Nikola Nikolić Diogo M. F. Santos Daniele Macciò Adriana Saccone Mabkhoot Alsaiari Mohammed Jalalah M. Faisal Farid A. Harraz Yizhao Li Abu Bakr Nassr Igor Pašti Biljana Šljukić |
| author_sort | Jadranka Milikić |
| collection | DOAJ |
| description | Platinum–dysprosium (Pt–Dy) alloys prepared by the arc melting technique are assessed as potential electrodes for the oxygen reduction reaction (ORR) using voltammetry and chronoamperometry in alkaline media. A relatively small change (10 at.%) in the alloy composition brought a notable difference in the alloys’ performance for the ORR. Pt<sub>40</sub>Dy<sub>60</sub> electrode, i.e., the electrode with a lower amount of Pt, was identified to have a higher activity towards ORR as evidenced by lower overpotential and higher current densities under identical experimental conditions. Furthermore, DFT calculations point out the unique single-atom-like coordination and electronic structure of Pt atoms in the Pt<sub>40</sub>Dy<sub>60</sub> surface as responsible for enhanced ORR activity compared to the alloy with a higher Pt content. Additionally, Pt–Dy alloys showed activity in the oxygen evolution reaction (OER), with the OER current density lower than that of pure Pt. |
| first_indexed | 2024-03-09T10:14:12Z |
| format | Article |
| id | doaj.art-3515bcf7dde440f2951701af81b2b078 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T10:14:12Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-3515bcf7dde440f2951701af81b2b0782023-12-01T22:30:45ZengMDPI AGNanomaterials2079-49912022-07-011214231810.3390/nano12142318Platinum–Dysprosium Alloys as Oxygen Electrodes in Alkaline Media: An Experimental and Theoretical StudyJadranka Milikić0Nikola Nikolić1Diogo M. F. Santos2Daniele Macciò3Adriana Saccone4Mabkhoot Alsaiari5Mohammed Jalalah6M. Faisal7Farid A. Harraz8Yizhao Li9Abu Bakr Nassr10Igor Pašti11Biljana Šljukić12Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12–16, 11158 Belgrade, SerbiaFaculty of Physical Chemistry, University of Belgrade, Studentski trg 12–16, 11158 Belgrade, SerbiaCenter of Physics and Engineering of Advanced Materials, Laboratory for Physics of Materials and Emerging Technologies, Chemical Engineering Department, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, PortugalDipartimento di Chimica e Chimica Industriale (DCCI), Università Degli Studi di Genova, Via Dodecaneso 31, I-16146 Genova, ItalyDipartimento di Chimica e Chimica Industriale (DCCI), Università Degli Studi di Genova, Via Dodecaneso 31, I-16146 Genova, ItalyPromising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, Najran 11001, Saudi ArabiaPromising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, Najran 11001, Saudi ArabiaPromising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, Najran 11001, Saudi ArabiaPromising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, Najran 11001, Saudi ArabiaYangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, ChinaElectronic Materials Research Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg Al-Arab City 21934, EgyptFaculty of Physical Chemistry, University of Belgrade, Studentski trg 12–16, 11158 Belgrade, SerbiaFaculty of Physical Chemistry, University of Belgrade, Studentski trg 12–16, 11158 Belgrade, SerbiaPlatinum–dysprosium (Pt–Dy) alloys prepared by the arc melting technique are assessed as potential electrodes for the oxygen reduction reaction (ORR) using voltammetry and chronoamperometry in alkaline media. A relatively small change (10 at.%) in the alloy composition brought a notable difference in the alloys’ performance for the ORR. Pt<sub>40</sub>Dy<sub>60</sub> electrode, i.e., the electrode with a lower amount of Pt, was identified to have a higher activity towards ORR as evidenced by lower overpotential and higher current densities under identical experimental conditions. Furthermore, DFT calculations point out the unique single-atom-like coordination and electronic structure of Pt atoms in the Pt<sub>40</sub>Dy<sub>60</sub> surface as responsible for enhanced ORR activity compared to the alloy with a higher Pt content. Additionally, Pt–Dy alloys showed activity in the oxygen evolution reaction (OER), with the OER current density lower than that of pure Pt.https://www.mdpi.com/2079-4991/12/14/2318oxygen reduction reactionoxygen evolution reactionplatinum–dysprosium alloysfuel cellslocal coordinationDFT analysis |
| spellingShingle | Jadranka Milikić Nikola Nikolić Diogo M. F. Santos Daniele Macciò Adriana Saccone Mabkhoot Alsaiari Mohammed Jalalah M. Faisal Farid A. Harraz Yizhao Li Abu Bakr Nassr Igor Pašti Biljana Šljukić Platinum–Dysprosium Alloys as Oxygen Electrodes in Alkaline Media: An Experimental and Theoretical Study Nanomaterials oxygen reduction reaction oxygen evolution reaction platinum–dysprosium alloys fuel cells local coordination DFT analysis |
| title | Platinum–Dysprosium Alloys as Oxygen Electrodes in Alkaline Media: An Experimental and Theoretical Study |
| title_full | Platinum–Dysprosium Alloys as Oxygen Electrodes in Alkaline Media: An Experimental and Theoretical Study |
| title_fullStr | Platinum–Dysprosium Alloys as Oxygen Electrodes in Alkaline Media: An Experimental and Theoretical Study |
| title_full_unstemmed | Platinum–Dysprosium Alloys as Oxygen Electrodes in Alkaline Media: An Experimental and Theoretical Study |
| title_short | Platinum–Dysprosium Alloys as Oxygen Electrodes in Alkaline Media: An Experimental and Theoretical Study |
| title_sort | platinum dysprosium alloys as oxygen electrodes in alkaline media an experimental and theoretical study |
| topic | oxygen reduction reaction oxygen evolution reaction platinum–dysprosium alloys fuel cells local coordination DFT analysis |
| url | https://www.mdpi.com/2079-4991/12/14/2318 |
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