Unveiling the Electrocatalytic Activity of Bifunctional Iron‐Niobium Double Perovskites for Overall Water Splitting: A‐Site Cation Influence
Abstract Capitalizing on the electrochemical conversion of water into hydrogen stands as a pivotal strategy in the global transition toward sustainable energy sources. This study investigates the influence of the A‐site cation type within A2FeNbO6 double perovskites (where A = Ca, Sr, or Ba) on thei...
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| Format: | Article |
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Wiley-VCH
2025-01-01
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| Series: | Advanced Materials Interfaces |
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| Online Access: | https://doi.org/10.1002/admi.202400559 |
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| author | Celal Avcıoğlu Maged F. Bekheet Suna Avcıoğlu Figen Kaya Byung Chul Kim Cengiz Kaya Aleksander Gurlo |
| author_facet | Celal Avcıoğlu Maged F. Bekheet Suna Avcıoğlu Figen Kaya Byung Chul Kim Cengiz Kaya Aleksander Gurlo |
| author_sort | Celal Avcıoğlu |
| collection | DOAJ |
| description | Abstract Capitalizing on the electrochemical conversion of water into hydrogen stands as a pivotal strategy in the global transition toward sustainable energy sources. This study investigates the influence of the A‐site cation type within A2FeNbO6 double perovskites (where A = Ca, Sr, or Ba) on their bifunctional electrocatalytic activities. The electrocatalytic performance is scrutinized in relation to charge transfer resistance, oxygen vacancy concentration, and metal‐oxygen covalency. Among the variants, Sr2FeNbO6 is distinguished as the optimal catalyst, achieving a current density of 10 mA cm⁻2 at overpotentials of 260 mV for the oxygen evolution reaction (OER) and 176 mV for the hydrogen evolution reaction (HER), thus matching the performance of leading metal oxide electrocatalysts. The study reveals pH‐dependent kinetics for Sr2FeNbO6, indicative of a lattice oxygen evolution mechanism for OER. An electrolyzer employing Sr2FeNbO6 electrodes for both the anode and cathode delivers a current density of 10 mA cm⁻2 at an efficient cell voltage of 1.76 V for complete alkaline water splitting, while also demonstrating exceptional stability. These insights advance the understanding of material optimization for electrocatalysis and position Sr2FeNbO6 as a viable catalyst for the sustainable production of hydrogen. |
| format | Article |
| id | doaj-art-3eca4fc6564d4e5f9e4bc4dbdd78de80 |
| institution | Kabale University |
| issn | 2196-7350 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Materials Interfaces |
| spelling | doaj-art-3eca4fc6564d4e5f9e4bc4dbdd78de802025-01-03T08:39:29ZengWiley-VCHAdvanced Materials Interfaces2196-73502025-01-01121n/an/a10.1002/admi.202400559Unveiling the Electrocatalytic Activity of Bifunctional Iron‐Niobium Double Perovskites for Overall Water Splitting: A‐Site Cation InfluenceCelal Avcıoğlu0Maged F. Bekheet1Suna Avcıoğlu2Figen Kaya3Byung Chul Kim4Cengiz Kaya5Aleksander Gurlo6Faculty III Process Sciences Institute of Materials Science and Technology Chair of Advanced Ceramic Materials Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin GermanyFaculty III Process Sciences Institute of Materials Science and Technology Chair of Advanced Ceramic Materials Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin GermanyFaculty of Chemistry and Metallurgy Department of Metallurgical and Materials Engineering Yıldız Technical University Istanbul 34210 TurkeyFaculty of Chemistry and Metallurgy Department of Metallurgical and Materials Engineering Yıldız Technical University Istanbul 34210 TurkeyElectromaterials Science lab & Department of Advanced Components and Materials Engineering Sunchon National University 255, Jungang‐ro, Suncheon‐si Jellanamdo 57922 Republic of KoreaFaculty of Chemistry and Metallurgy Department of Metallurgical and Materials Engineering Yıldız Technical University Istanbul 34210 TurkeyFaculty III Process Sciences Institute of Materials Science and Technology Chair of Advanced Ceramic Materials Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin GermanyAbstract Capitalizing on the electrochemical conversion of water into hydrogen stands as a pivotal strategy in the global transition toward sustainable energy sources. This study investigates the influence of the A‐site cation type within A2FeNbO6 double perovskites (where A = Ca, Sr, or Ba) on their bifunctional electrocatalytic activities. The electrocatalytic performance is scrutinized in relation to charge transfer resistance, oxygen vacancy concentration, and metal‐oxygen covalency. Among the variants, Sr2FeNbO6 is distinguished as the optimal catalyst, achieving a current density of 10 mA cm⁻2 at overpotentials of 260 mV for the oxygen evolution reaction (OER) and 176 mV for the hydrogen evolution reaction (HER), thus matching the performance of leading metal oxide electrocatalysts. The study reveals pH‐dependent kinetics for Sr2FeNbO6, indicative of a lattice oxygen evolution mechanism for OER. An electrolyzer employing Sr2FeNbO6 electrodes for both the anode and cathode delivers a current density of 10 mA cm⁻2 at an efficient cell voltage of 1.76 V for complete alkaline water splitting, while also demonstrating exceptional stability. These insights advance the understanding of material optimization for electrocatalysis and position Sr2FeNbO6 as a viable catalyst for the sustainable production of hydrogen.https://doi.org/10.1002/admi.202400559bifunctional catalystselectrochemical hydrogen generationHERiron‐niobium double perovskitelattice oxygen evolution mechanismOER |
| spellingShingle | Celal Avcıoğlu Maged F. Bekheet Suna Avcıoğlu Figen Kaya Byung Chul Kim Cengiz Kaya Aleksander Gurlo Unveiling the Electrocatalytic Activity of Bifunctional Iron‐Niobium Double Perovskites for Overall Water Splitting: A‐Site Cation Influence Advanced Materials Interfaces bifunctional catalysts electrochemical hydrogen generation HER iron‐niobium double perovskite lattice oxygen evolution mechanism OER |
| title | Unveiling the Electrocatalytic Activity of Bifunctional Iron‐Niobium Double Perovskites for Overall Water Splitting: A‐Site Cation Influence |
| title_full | Unveiling the Electrocatalytic Activity of Bifunctional Iron‐Niobium Double Perovskites for Overall Water Splitting: A‐Site Cation Influence |
| title_fullStr | Unveiling the Electrocatalytic Activity of Bifunctional Iron‐Niobium Double Perovskites for Overall Water Splitting: A‐Site Cation Influence |
| title_full_unstemmed | Unveiling the Electrocatalytic Activity of Bifunctional Iron‐Niobium Double Perovskites for Overall Water Splitting: A‐Site Cation Influence |
| title_short | Unveiling the Electrocatalytic Activity of Bifunctional Iron‐Niobium Double Perovskites for Overall Water Splitting: A‐Site Cation Influence |
| title_sort | unveiling the electrocatalytic activity of bifunctional iron niobium double perovskites for overall water splitting a site cation influence |
| topic | bifunctional catalysts electrochemical hydrogen generation HER iron‐niobium double perovskite lattice oxygen evolution mechanism OER |
| url | https://doi.org/10.1002/admi.202400559 |
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