Academic Journal
Reversible Redox Probes to Determine Band-Edge Locations and Dopant Concentrations of Nano-TiO2 Thin-Films: Settling the Mott-Schottky Conundrum
| العنوان: | Reversible Redox Probes to Determine Band-Edge Locations and Dopant Concentrations of Nano-TiO2 Thin-Films: Settling the Mott-Schottky Conundrum |
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| المؤلفون: | Khurana, Divyansh Anil, Plankensteiner, Nina, VERMANG, Bart, Vereecken, Philippe M. |
| المساهمون: | Vermang, Bart/0000-0003-2669-2087, Khurana, Divyansh/0000-0003-0099-2313, Khurana, Divyansh Anil, Plankensteiner, Nina, VERMANG, Bart, Vereecken, Philippe M. |
| بيانات النشر: | WILEY-V C H VERLAG GMBH |
| سنة النشر: | 2024 |
| المجموعة: | Document Server@UHasselt (Universiteit Hasselt) |
| مصطلحات موضوعية: | electrochemistry, energy band diagram, nano-titanium dioxide, redox probes, semiconductors |
| الوصف: | Knowing the exact location of the semiconductor band-edges is key for mechanistic insights into their use for water and CO2 photo/electrocatalysis. In this regard, a reliable strategy for nano-semiconductors did not exist yet. We demonstrate the use of reversible redox probes on nano-semiconductor electrodes to determine their band-edge locations in aqueous solutions. Rectifying current-potential (i-U) characteristics with the high work function (i.e. more positive formal potential) Fe(CN)6 3-/Fe(CN)6 4- redox couple yielded the exact flatband potential at various pH whereas the reversible i-U characteristics with the low work function (i.e. more negative formal potential) Ru(NH3)6 3+/Ru(NH3)6 2+ redox couple provided the conduction band-edge location and dopant concentration for a 30 nm thin-film n-TiO2. The methodology can be extended to other nano-semiconductors and serves as an alternative to and goes beyond the capabilities of the Mott-Schottky procedure for bulk semiconductor electrodes. ; The authors acknowledge funding from VLAIO (Flanders Innovation and Entrepreneurship) under the Flanders Industry Innovation Moonshot program for the SYN-CAT (HBC.2020.2614) project. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | Angewandte Chemie (International edition); http://hdl.handle.net/1942/44762; WOS:001357989100001 |
| DOI: | 10.1002/anie.202415857 |
| الاتاحة: | http://hdl.handle.net/1942/44762 https://doi.org/10.1002/anie.202415857 |
| رقم الانضمام: | edsbas.C60D2B71 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1002/anie.202415857 |
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