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  Negative Charging of Au Nanoparticles during Methanol Synthesis from CO2/H-2 on a Au/ZnO Catalyst: Insights from Operando IR and Near-Ambient-Pressure XPS and XAS Measurements

Abdel-Mageed, A. M., Klyushin, A., Rezvani, A., Knop-Gericke, A., Schlögl, R., & Behm, J. (2019). Negative Charging of Au Nanoparticles during Methanol Synthesis from CO2/H-2 on a Au/ZnO Catalyst: Insights from Operando IR and Near-Ambient-Pressure XPS and XAS Measurements. Angewandte Chemie, International Edition in English, 58(30), 10325-10329. doi:10.1002/anie.201900150.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0005-A915-5 Version Permalink: https://hdl.handle.net/21.11116/0000-0005-A916-4
Genre: Journal Article

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Abdel-Mageed, Ali M., Author
Klyushin, Alexander, Author
Rezvani, Azita, Author
Knop-Gericke, Axel1, Author           
Schlögl, Robert1, Author           
Behm, Juergen, Author
Affiliations:
1Research Department Schlögl, Max Planck Institute for Chemical Energy Conversion, Max Planck Society, ou_3023874              

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 Abstract: The electronic and structural properties of Au/ZnO under industrial and idealized methanol synthesis conditions have been investigated. This was achieved by kinetic measurements in combination with time-resolved operando infrared (DRIFTS) as well as 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. The adsorption of CO during the reaction revealed the presence of negatively charged Au nanoparticles/Au sites 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 rate of methanol formation. 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
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: ISI: 000476452700049
DOI: 10.1002/anie.201900150
 Degree: -

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Title: Angewandte Chemie, International Edition in English
  Alternative Title : Angew. Chem., Int. Ed. Engl.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 58 (30) Sequence Number: - Start / End Page: 10325 - 10329 Identifier: ISSN: 1433-7851
n.a.: /journals/resource/0570-0833