Ziemba, Marc ; Radtke, Mariusz ; Schumacher, Leon ; Hess, Christian (2022)
Elucidating CO₂ Hydrogenation over In₂O₃ Nanoparticles using Operando UV/Vis and Impedance Spectroscopies.
In: Angewandte Chemie International Edition, 2022, 61 (39)
doi: 10.26083/tuprints-00022886
Artikel, Zweitveröffentlichung, Verlagsversion
Kurzbeschreibung (Abstract)
In₂O₃ has emerged as a promising catalyst for CO₂ activation, but a fundamental understanding of its mode of operation in CO₂ hydrogenation is still missing, as the application of operando vibrational spectroscopy is challenging due to absorption effects. In this mechanistic study, we systematically address the redox processes related to the reverse water‐gas shift reaction (rWGSR) over In₂O₃ nanoparticles, both at the surface and in the bulk. Based on temperature‐dependent operando UV/Vis spectra and a novel operando impedance approach for thermal powder catalysts, we propose oxidation by CO₂ as the rate‐determining step for the rWGSR. The results are consistent with redox processes, whereby hydrogen‐containing surface species are shown to exhibit a promoting effect. Our findings demonstrate that oxygen/hydrogen dynamics, in addition to surface processes, are important for the activity, which is expected to be of relevance not only for In₂O₃ but also for other reducible oxide catalysts.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Ziemba, Marc ; Radtke, Mariusz ; Schumacher, Leon ; Hess, Christian |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Elucidating CO₂ Hydrogenation over In₂O₃ Nanoparticles using Operando UV/Vis and Impedance Spectroscopies |
| Sprache: | Englisch |
| Publikationsjahr: | 2022 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2022 |
| Verlag: | Wiley-VCH |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Angewandte Chemie International Edition |
| Jahrgang/Volume einer Zeitschrift: | 61 |
| (Heft-)Nummer: | 39 |
| Kollation: | 8 Seiten |
| DOI: | 10.26083/tuprints-00022886 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/22886 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | In₂O₃ has emerged as a promising catalyst for CO₂ activation, but a fundamental understanding of its mode of operation in CO₂ hydrogenation is still missing, as the application of operando vibrational spectroscopy is challenging due to absorption effects. In this mechanistic study, we systematically address the redox processes related to the reverse water‐gas shift reaction (rWGSR) over In₂O₃ nanoparticles, both at the surface and in the bulk. Based on temperature‐dependent operando UV/Vis spectra and a novel operando impedance approach for thermal powder catalysts, we propose oxidation by CO₂ as the rate‐determining step for the rWGSR. The results are consistent with redox processes, whereby hydrogen‐containing surface species are shown to exhibit a promoting effect. Our findings demonstrate that oxygen/hydrogen dynamics, in addition to surface processes, are important for the activity, which is expected to be of relevance not only for In₂O₃ but also for other reducible oxide catalysts. |
| Freie Schlagworte: | CO₂ Activation, In₂O₃, Operando Spectroscopy, Reaction Mechanism, Reverse Water-Gas Shift |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-228869 |
| Zusätzliche Informationen: | International Version |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Fachbereich(e)/-gebiet(e): | 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Physikalische Chemie |
| Hinterlegungsdatum: | 23 Dez 2022 14:05 |
| Letzte Änderung: | 28 Dez 2022 07:21 |
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| Zugehörige Links: | |
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