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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...

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Autores principales: Milikić, Jadranka, Nikolić, Nikola, Santos, Diogo M. F., Macciò, Daniele, Saccone, Adriana, Alsaiari, Mabkhoot, Jalalah, Mohammed, Faisal, M., Harraz, Farid A., Li, Yizhao, Nassr, Abu Bakr, Pašti, Igor, Šljukić, Biljana
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9315578/
https://www.ncbi.nlm.nih.gov/pubmed/35889543
http://dx.doi.org/10.3390/nano12142318
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author Milikić, Jadranka
Nikolić, Nikola
Santos, Diogo M. F.
Macciò, Daniele
Saccone, Adriana
Alsaiari, Mabkhoot
Jalalah, Mohammed
Faisal, M.
Harraz, Farid A.
Li, Yizhao
Nassr, Abu Bakr
Pašti, Igor
Šljukić, Biljana
author_facet Milikić, Jadranka
Nikolić, Nikola
Santos, Diogo M. F.
Macciò, Daniele
Saccone, Adriana
Alsaiari, Mabkhoot
Jalalah, Mohammed
Faisal, M.
Harraz, Farid A.
Li, Yizhao
Nassr, Abu Bakr
Pašti, Igor
Šljukić, Biljana
author_sort Milikić, Jadranka
collection PubMed
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(40)Dy(60) 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(40)Dy(60) 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.
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spelling pubmed-93155782022-07-27 Platinum–Dysprosium Alloys as Oxygen Electrodes in Alkaline Media: An Experimental and Theoretical Study Milikić, Jadranka Nikolić, Nikola Santos, Diogo M. F. Macciò, Daniele Saccone, Adriana Alsaiari, Mabkhoot Jalalah, Mohammed Faisal, M. Harraz, Farid A. Li, Yizhao Nassr, Abu Bakr Pašti, Igor Šljukić, Biljana Nanomaterials (Basel) Article 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(40)Dy(60) 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(40)Dy(60) 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. MDPI 2022-07-06 /pmc/articles/PMC9315578/ /pubmed/35889543 http://dx.doi.org/10.3390/nano12142318 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Milikić, Jadranka
Nikolić, Nikola
Santos, Diogo M. F.
Macciò, Daniele
Saccone, Adriana
Alsaiari, Mabkhoot
Jalalah, Mohammed
Faisal, M.
Harraz, Farid A.
Li, Yizhao
Nassr, Abu Bakr
Pašti, Igor
Šljukić, Biljana
Platinum–Dysprosium Alloys as Oxygen Electrodes in Alkaline Media: An Experimental and Theoretical Study
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 Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9315578/
https://www.ncbi.nlm.nih.gov/pubmed/35889543
http://dx.doi.org/10.3390/nano12142318
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