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Goodwin CM, Shipilin M, Albertin S, Hejral U, Lömker P, Wang HY, Blomberg S, Degerman D, Schlueter C, Nilsson A, Lundgren E, Amann P. The Structure of the Active Pd State During Catalytic Carbon Monoxide Oxidization. J Phys Chem Lett 2021; 12:4461-4465. [PMID: 33955763 PMCID: PMC8279738 DOI: 10.1021/acs.jpclett.1c00620] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 04/21/2021] [Indexed: 06/12/2023]
Abstract
Using grazing incidence X-rays and X-ray photoelectron spectroscopy during the mass transfer limited catalytic oxidation of CO, the long-range surface structure of Pd(100) was investigated. Under the reaction conditions of 50:4 O2 to CO, 300 mbar pressure, and temperatures between 200 and 450 °C, the surface structure resulting from oxidation and the subsequent oxide reduction was elucidated. The reduction cycle was halted, and while under reaction conditions, angle-dependent X-ray photoelectron spectroscopy close to the critical angle of Pd and modeling of the data was performed. Two proposed models for the system were compared. The suggestion with the metallic islands formed on top of the oxide island was shown to be consistent with the data.
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Affiliation(s)
| | - Mikhail Shipilin
- Department
of Physics, Stockholm University, 10691 Stockholm, Sweden
| | - Stefano Albertin
- Synchrotron
Radiation Research, Lund University, 22100 Lund, Sweden
| | - Uta Hejral
- Synchrotron
Radiation Research, Lund University, 22100 Lund, Sweden
| | - Patrick Lömker
- Photon
Science, Deutsches Elektronen-Synchrotron
(DESY), 22607 Hamburg, Germany
| | - Hsin-Yi Wang
- Department
of Physics, Stockholm University, 10691 Stockholm, Sweden
| | - Sara Blomberg
- Department
of Chemical Engineering, Lund University, 22100 Lund, Sweden
| | - David Degerman
- Department
of Physics, Stockholm University, 10691 Stockholm, Sweden
| | - Christoph Schlueter
- Photon
Science, Deutsches Elektronen-Synchrotron
(DESY), 22607 Hamburg, Germany
| | - Anders Nilsson
- Department
of Physics, Stockholm University, 10691 Stockholm, Sweden
| | - Edvin Lundgren
- Synchrotron
Radiation Research, Lund University, 22100 Lund, Sweden
| | - Peter Amann
- Department
of Physics, Stockholm University, 10691 Stockholm, Sweden
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Jach T, Landree E. Grazing-incidence x-ray photoemission spectroscopy and the accuracy of thickness measurements of CMOS gate dielectrics. SURF INTERFACE ANAL 2001. [DOI: 10.1002/sia.1108] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Iijima Y, Miyoshi K, Saito S. Detection of surface impurities on Si wafers using total reflection x‐ray photoelectron spectroscopy. SURF INTERFACE ANAL 1999. [DOI: 10.1002/(sici)1096-9918(199901)27:1<35::aid-sia461>3.0.co;2-#] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yoshitoki Iijima
- Application and Research Center, Electron Optics Division, JEOL Ltd, 3‐1‐2 Musashino, Akishima‐shi, Tokyo 196‐8558, Japan
| | - Kousuke Miyoshi
- Crystal Technology Development Laboratory, ULSI Device Development Laboratories, NEC Co., 1120 Shimokuzawa, Sagamihara‐shi, Kanagawa 229‐1198, Japan
| | - Shuichi Saito
- Crystal Technology Development Laboratory, ULSI Device Development Laboratories, NEC Co., 1120 Shimokuzawa, Sagamihara‐shi, Kanagawa 229‐1198, Japan
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Chester MJ, Jach T. Grazing-incidence x-ray photoelectron spectroscopy from multilayer media: Oxidized GaAs(100) as a case study. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:17262-17270. [PMID: 10008335 DOI: 10.1103/physrevb.48.17262] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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