dc.date.accessioned | 2024-02-05T07:52:16Z | |
dc.date.available | 2024-02-05T07:52:16Z | |
dc.date.created | 2023-09-17T18:08:22Z | |
dc.date.issued | 2023 | |
dc.identifier.citation | Dahl, Øystein Sunding, Martin Fleissner Killi, Veronica Anne-Line Kathrine Svenum, Ingeborg-Helene Grandcolas, Mathieu Andreassen, Magnus Nilsen, Ola Thøgersen, Annett Jensen, Ingvild Julie Thue Chatzitakis, Athanasios . Interrogation of the Interfacial Energetics at a Tantalum Nitride/Electrolyte Heterojunction during Photoelectrochemical Water Splitting by Operando Ambient Pressure X-ray Photoelectron Spectroscopy. ACS Catalysis. 2023, 13(17), 11762-11770 | |
dc.identifier.uri | http://hdl.handle.net/10852/107512 | |
dc.description.abstract | Photoelectrochemical (PEC) water electrolysis is an important energy conversion (power-to-chemical) method, providing a solution to the intermittent nature of solar energy. However, as PEC systems usually suffer from low operational stability, they are seriously lagging in up-scaled demonstrations and viability. PEC systems are based on semiconductor/liquid interfaces, which have been extensively studied by experiments and theory, but there is a significant knowledge gap in the energetics of such interfaces during operation. In this work, operando ambient pressure X-ray photoelectron spectroscopy (AP-XPS) has been used to characterize the electrical and spectroscopic properties of a pristine Ta3N5 photoelectrode and a Ta3N5/NiOx protection/passivation layer system, which stabilizes an otherwise quickly corroding pristine photoelectrode. We directly observed Fermi-level pinning of Ta3N5 within the applied potential window under both dark and illumination conditions, detrimental to the performance and stability of the photoelectrode. Interestingly, in the Ta3N5/NiOx protection/passivation layer system, the Fermi level gets unpinned under illumination, allowing quasi-Fermi-level splitting and sustaining a significant PEC performance as well as high stability. | |
dc.language | EN | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | Interrogation of the Interfacial Energetics at a Tantalum Nitride/Electrolyte Heterojunction during Photoelectrochemical Water Splitting by Operando Ambient Pressure X-ray Photoelectron Spectroscopy | |
dc.title.alternative | ENEngelskEnglishInterrogation of the Interfacial Energetics at a Tantalum Nitride/Electrolyte Heterojunction during Photoelectrochemical Water Splitting by Operando Ambient Pressure X-ray Photoelectron Spectroscopy | |
dc.type | Journal article | |
dc.creator.author | Dahl, Øystein | |
dc.creator.author | Sunding, Martin Fleissner | |
dc.creator.author | Killi, Veronica Anne-Line Kathrine | |
dc.creator.author | Svenum, Ingeborg-Helene | |
dc.creator.author | Grandcolas, Mathieu | |
dc.creator.author | Andreassen, Magnus | |
dc.creator.author | Nilsen, Ola | |
dc.creator.author | Thøgersen, Annett | |
dc.creator.author | Jensen, Ingvild Julie Thue | |
dc.creator.author | Chatzitakis, Athanasios | |
cristin.unitcode | 185,0,0,0 | |
cristin.unitname | Universitetet i Oslo | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |
dc.identifier.cristin | 2175811 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=ACS Catalysis&rft.volume=13&rft.spage=11762&rft.date=2023 | |
dc.identifier.jtitle | ACS Catalysis | |
dc.identifier.volume | 13 | |
dc.identifier.issue | 17 | |
dc.identifier.startpage | 11762 | |
dc.identifier.endpage | 11770 | |
dc.identifier.doi | https://doi.org/10.1021/acscatal.3c02423 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 2155-5435 | |
dc.type.version | PublishedVersion | |