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https://doi.org/10.21256/zhaw-20920| Publication type: | Article in scientific journal |
| Type of review: | Peer review (publication) |
| Title: | Support effects in iridium-catalyzed aerobic oxidation of benzyl alcohol studied by modulation-excitation attenuated total reflection IR spectroscopy |
| Authors: | Ito, Shizuka Wang, Xianwei Waheed, Ammara Li, Gao Maeda, Nobutaka Meier, Daniel Matthias Naito, Shuichi Baiker, Alfons |
| et. al: | No |
| DOI: | 10.1016/j.jcat.2020.11.010 10.21256/zhaw-20920 |
| Published in: | Journal of Catalysis |
| Volume(Issue): | 393 |
| Page(s): | 42 |
| Pages to: | 50 |
| Issue Date: | 2020 |
| Publisher / Ed. Institution: | Elsevier |
| ISSN: | 0021-9517 1090-2694 |
| Language: | English |
| Subjects: | Aerobic oxidation; Benzyl alcohol; Iridium catalysts; ATR-IR spectroscopy; Modulation excitation spectroscopy; Effect of support; Al2O3; CeO2; Transient alkoxide; TiO2 overlayer |
| Subject (DDC): | 540: Chemistry |
| Abstract: | The influence of the support (Al2O3, CeO2, TiO2) in the oxidation of benzyl alcohol (BA) to benzaldehyde on Ir-based catalysts was investigated by ATR-IR spectroscopy in tandem with modulation excitation spectroscopy (ATR-IR-MES) at working conditions of the catalysts. ATR-IR-MES unveiled the dissociative adsorption of BA and the formation of adsorbed transient alkoxy species (C6H5CH2O-) to be key for high catalytic performance. These species were detected on Ir/TiO2 and Ir/Al2O3 but not on Ir/CeO2, which exhibited poor catalytic performance. On Ir/TiO2 pretreated with hydrogen at 450°C about 84% of the Ir sites were blocked due to formation of a titania overlayer. However, this catalyst afforded a more than seven times higher activity than the corresponding one pretreated at 300°C, where about 68% of the Ir sites were blocked. The high activity of the titania overlayer is attributed to the formation of Ti cations with oxygen vacancies caused by the hydrogen pretreatment. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/20920 |
| Fulltext version: | Accepted version |
| License (according to publishing contract): | CC BY-NC-ND 4.0: Attribution - Non commercial - No derivatives 4.0 International |
| Restricted until: | 2022-11-23 |
| Departement: | School of Engineering |
| Organisational Unit: | Institute of Materials and Process Engineering (IMPE) |
| Appears in collections: | Publikationen School of Engineering |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2020_Ito-etal_Iridium-catalyzed-aerobic-oxidation-of-benzyl-alcohol.pdf | Accepted Version | 3.47 MB | Adobe PDF |  View/Open |
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Ito, S., Wang, X., Waheed, A., Li, G., Maeda, N., Meier, D. M., Naito, S., & Baiker, A. (2020). Support effects in iridium-catalyzed aerobic oxidation of benzyl alcohol studied by modulation-excitation attenuated total reflection IR spectroscopy. Journal of Catalysis, 393, 42–50. https://doi.org/10.1016/j.jcat.2020.11.010
Ito, S. et al. (2020) ‘Support effects in iridium-catalyzed aerobic oxidation of benzyl alcohol studied by modulation-excitation attenuated total reflection IR spectroscopy’, Journal of Catalysis, 393, pp. 42–50. Available at: https://doi.org/10.1016/j.jcat.2020.11.010.
S. Ito et al., “Support effects in iridium-catalyzed aerobic oxidation of benzyl alcohol studied by modulation-excitation attenuated total reflection IR spectroscopy,” Journal of Catalysis, vol. 393, pp. 42–50, 2020, doi: 10.1016/j.jcat.2020.11.010.
ITO, Shizuka, Xianwei WANG, Ammara WAHEED, Gao LI, Nobutaka MAEDA, Daniel Matthias MEIER, Shuichi NAITO und Alfons BAIKER, 2020. Support effects in iridium-catalyzed aerobic oxidation of benzyl alcohol studied by modulation-excitation attenuated total reflection IR spectroscopy. Journal of Catalysis. 2020. Bd. 393, S. 42–50. DOI 10.1016/j.jcat.2020.11.010
Ito, Shizuka, Xianwei Wang, Ammara Waheed, Gao Li, Nobutaka Maeda, Daniel Matthias Meier, Shuichi Naito, and Alfons Baiker. 2020. “Support Effects in Iridium-Catalyzed Aerobic Oxidation of Benzyl Alcohol Studied by Modulation-Excitation Attenuated Total Reflection IR Spectroscopy.” Journal of Catalysis 393: 42–50. https://doi.org/10.1016/j.jcat.2020.11.010.
Ito, Shizuka, et al. “Support Effects in Iridium-Catalyzed Aerobic Oxidation of Benzyl Alcohol Studied by Modulation-Excitation Attenuated Total Reflection IR Spectroscopy.” Journal of Catalysis, vol. 393, 2020, pp. 42–50, https://doi.org/10.1016/j.jcat.2020.11.010.
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