| Title: | Ferroelectric ▫$KNbO_3$▫ nanoplatelets for thermally driven pyrocatalytic hydrogen evolution and dye degradation |
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| Authors: | ID Touili, Salma (Author)
ID Asbani, Bouchra (Author)
ID Hadouch, Youness, Institut "Jožef Stefan" (Author)
ID Suban, Nejc, Institut "Jožef Stefan" (Author)
ID Uršič Nemevšek, Hana, Institut "Jožef Stefan" (Author)
ID Kutnjak, Zdravko, Institut "Jožef Stefan" (Author)
ID Rožič, Brigita, Institut "Jožef Stefan" (Author)
ID El Marssi, Mimoun (Author) |
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| Files: |  URL - Source URL, visit https://www.sciencedirect.com/science/article/pii/S0016236125024305?via%3Dihub
 PDF - Presentation file, download (7,88 MB)
MD5: 2E1032C4592333F13F5732597A9B30A0
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  IJS - Jožef Stefan Institute
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| Abstract: | Day and night shift-induced thermal cycling offers a promising route toward free energy for green hydrogen production and dye degradation. Pyroelectric materials make this possible by converting temperature fluctuations into electrical charges that drive water splitting catalytic reactions and produce hydrogen fuel. Herein, we demonstrate an efficient pyrocatalytic hydrogen evolution reaction and Rhodamine B (RhB) degradation using ferroelectric potassium niobate (KNbO3) perovskite nanoplatelets (KN-np) with an orthorhombic phase. Under thermal cycling between 20 and 50 °C, KN-np produced a high hydrogen yield of 680 μmol·g–1 over 30 thermal cycles, with an average hydrogen generation rate of approximately 22.67 μmol g–1 per thermal cycle. Besides, KN-np pyrocatalytic activity enabled efficient degradation of the RhB dye up to 84 % after only 16 cycles with a high kinetic rate constant of 0.11 per thermal cycle. Our findings show that the excellent pyroelectric properties of KN-np are at the origin of the catalytic activity enhancement. This work lays the foundation for the future design of pyroelectric materials for clean energy production and environmental remediation. |
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| Keywords: | pyrocatalysis, nanoplatelets, clean energy production, dye degradation |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 30.04.2025 |
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| Article acceptance date: | 01.09.2025 |
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| Publication date: | 05.09.2025 |
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| Publisher: | Elsevier |
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| Year of publishing: | 2026 |
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| Number of pages: | str. 1-13 |
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| Numbering: | Vol. 405, pt. C, [article no.] 136705 |
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| Source: | Nizozemska |
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| PID: | 20.500.12556/DiRROS-25343  |
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| UDC: | 544.5/.6 |
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| ISSN on article: | 1873-7153 |
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| DOI: | 10.1016/j.fuel.2025.136705 |
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| COBISS.SI-ID: | 248246531 |
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| Copyright: | © 2025 The Author(s). |
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| Note: | Nasl. z nasl. zaslona;
Soavtorji: Nejc Suban, Hana Uršič, Zdravko Kutnjak, Brigita Rožič;
Opis vira z dne 9. 9. 2025;
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| Publication date in DiRROS: | 16.01.2026 |
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| Views: | 164 |
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| Downloads: | 70 |
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