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  Negative Charging of Au Nanoparticles during Methanol Synthesis from CO₂/H₂ on a Au/ZnO Catalyst: Insights from Operando Infrared and Near‐ambient Pressure XPS and XAS

Abdel-Mageed, A. M., Klyushin, A., Rezvani, A., Knop-Gericke, A., Schlögl, R., & Behm, R. J. (2019). Negative Charging of Au Nanoparticles during Methanol Synthesis from CO₂/H₂ on a Au/ZnO Catalyst: Insights from Operando Infrared and Near‐ambient Pressure XPS and XAS. Angewandte Chemie International Edition, 58(30), 10325-10329. doi:10.1002/anie.201900150.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0003-7552-D Version Permalink: https://hdl.handle.net/21.11116/0000-0006-4696-2
Genre: Journal Article

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2019
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 Creators:
Abdel-Mageed, Ali M.1, 2, Author
Klyushin, Alexander3, 4, Author           
Rezvani, Azita1, Author
Knop-Gericke, Axel3, Author           
Schlögl, Robert3, Author           
Behm, R. Jürgen1, Author
Affiliations:
1Institute of Surface Chemistry and Catalysis, Ulm University, D-89069 Ulm, Germany, ou_persistent22              
2Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt, ou_persistent22              
3Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
4Helmholtz-Zentrum Berlin für Materialien und Energie, BESSY II, Albert-Einstein-Straße 15, 12489 Berlin, Germany, ou_persistent22              

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 Abstract: Kinetic measurements in combination with time resolved operando infrared (DRIFTS), in situ near ambient pressure X‐ray photoelectron spectroscopy (NAP‐XPS) and X‐ray absorption near edge spectroscopy (XANES) measurements at the O K‐edge together with high resolution electron microscopy were applied to evaluate the electronic and structural properties of Au/ZnO under industrial and idealized methanol synthesis conditions. CO adsorption during the reaction revealed the presence of negatively charged Au nanoparticles / Au sites under reaction conditions, which are formed during the initial phase of the reaction. Near ambient pressure XPS and XANES demonstrate the build‐up of O‐vacancies during the reaction, which goes along with a substantial increase in the methanol formation rate. The results are discussed in comparison with previous findings for Cu/ZnO and Au/ZnO catalysts.

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Language(s): eng - English
 Dates: 2019-03-292019-01-052019-04-012019-04-122019-07-22
 Publication Status: Issued
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/anie.201900150
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Title: Angewandte Chemie International Edition
  Other : Angew. Chem. Int. Ed.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: 6 Volume / Issue: 58 (30) Sequence Number: - Start / End Page: 10325 - 10329 Identifier: ISSN: 1433-7851
CoNE: https://pure.mpg.de/cone/journals/resource/1433-7851