Elger, Ann‐Kathrin ; Hess, Christian (2024)
Elucidating the Mechanism of Working SnO₂ Gas Sensors Using Combined Operando UV/Vis, Raman, and IR Spectroscopy.
In: Angewandte Chemie International Edition, 2019, 58 (42)
doi: 10.26083/tuprints-00026766
Artikel, Zweitveröffentlichung, Verlagsversion
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Kurzbeschreibung (Abstract)
SnO₂ is the most widely used metal oxide gas-sensing material but a detailed understanding of its functioning is still lacking despite its relevance for applications. To gain new mechanistic insight into SnO₂ gas sensors under working conditions, we have developed an operando approach based on combined UV/Vis, Raman, and FTIR spectroscopy, allowing us for the first time to relate the sensor response to the concentration of oxygen vacancies in the metal oxide, the nature of the adsorbates, and the gas-phase composition. We demonstrate with the example of ethanol gas sensing that the sensor resistance is directly correlated with the number of surface oxygen vacancies and the presence of surface species, in particular, acetate and hydroxy groups. Our operando results enable an assessment of mechanistic models proposed in the literature to explain gas sensor operation. Owing to their fundamental nature, our findings are of direct relevance also for other metal oxide gas sensors.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Elger, Ann‐Kathrin ; Hess, Christian |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Elucidating the Mechanism of Working SnO₂ Gas Sensors Using Combined Operando UV/Vis, Raman, and IR Spectroscopy |
| Sprache: | Englisch |
| Publikationsjahr: | 24 April 2024 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2019 |
| Ort der Erstveröffentlichung: | Weinheim |
| Verlag: | Wiley |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Angewandte Chemie International Edition |
| Jahrgang/Volume einer Zeitschrift: | 58 |
| (Heft-)Nummer: | 42 |
| DOI: | 10.26083/tuprints-00026766 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/26766 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichungsservice |
| Kurzbeschreibung (Abstract): | SnO₂ is the most widely used metal oxide gas-sensing material but a detailed understanding of its functioning is still lacking despite its relevance for applications. To gain new mechanistic insight into SnO₂ gas sensors under working conditions, we have developed an operando approach based on combined UV/Vis, Raman, and FTIR spectroscopy, allowing us for the first time to relate the sensor response to the concentration of oxygen vacancies in the metal oxide, the nature of the adsorbates, and the gas-phase composition. We demonstrate with the example of ethanol gas sensing that the sensor resistance is directly correlated with the number of surface oxygen vacancies and the presence of surface species, in particular, acetate and hydroxy groups. Our operando results enable an assessment of mechanistic models proposed in the literature to explain gas sensor operation. Owing to their fundamental nature, our findings are of direct relevance also for other metal oxide gas sensors. |
| Freie Schlagworte: | ethanol, gas sensors, mechanisms, operando spectroscopy, SnO₂ |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-267666 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Fachbereich(e)/-gebiet(e): | 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Physikalische Chemie |
| Hinterlegungsdatum: | 24 Apr 2024 12:25 |
| Letzte Änderung: | 25 Apr 2024 07:48 |
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- Elucidating the Mechanism of Working SnO₂ Gas Sensors Using Combined Operando UV/Vis, Raman, and IR Spectroscopy. (deposited 24 Apr 2024 12:25) [Gegenwärtig angezeigt]
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