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Kaichev V, Teschner D, Saraev A, Kosolobov S, Gladky A, Prosvirin I, Rudina N, Ayupov A, Blume R, Hävecker M, Knop-Gericke A, Schlögl R, Latyshev A, Bukhtiyarov V. Evolution of self-sustained kinetic oscillations in the catalytic oxidation of propane over a nickel foil. J Catal 2016. [DOI: 10.1016/j.jcat.2015.11.009] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Vogel D, Spiel C, Schmid M, Stöger-Pollach M, Schlögl R, Suchorski Y, Rupprechter G. The Role of Defects in the Local Reaction Kinetics of CO Oxidation on Low-Index Pd Surfaces. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2013; 117:12054-12060. [PMID: 23785524 PMCID: PMC3683887 DOI: 10.1021/jp312510d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 05/17/2013] [Indexed: 05/28/2023]
Abstract
The role of artificially created defects and steps in the local reaction kinetics of CO oxidation on the individual domains of a polycrystalline Pd foil was studied by photoemission electron microscopy (PEEM), mass spectroscopy (MS), and scanning tunneling microscopy (STM). The defects and steps were created by STM-controlled Ar+ sputtering and the novel PEEM-based approach allowed the simultaneous determination of local kinetic phase transitions on differently oriented μm-sized grains of a polycrystalline sample. The independent (single-crystal-like) reaction behavior of the individual Pd(hkl) domains in the 10-5 mbar pressure range changes upon Ar+ sputtering to a correlated reaction behavior, and the reaction fronts propagate unhindered across the grain boundaries. The defect-rich surface shows also a significantly higher CO tolerance as reflected by the shift of both the global (MS-measured) and the local (PEEM-measured) kinetic diagrams toward higher CO pressure.
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Affiliation(s)
- D. Vogel
- Institute
of Materials Chemistry, Institute of Applied Physics, and University Service Center for Transmission
Electron Microscopy, Vienna University of
Technology, Vienna, Austria
- Fritz-Haber-Institut der Max-Planck-Gesellschaft,
Berlin, Germany
| | - C. Spiel
- Institute
of Materials Chemistry, Institute of Applied Physics, and University Service Center for Transmission
Electron Microscopy, Vienna University of
Technology, Vienna, Austria
| | - M. Schmid
- Institute
of Materials Chemistry, Institute of Applied Physics, and University Service Center for Transmission
Electron Microscopy, Vienna University of
Technology, Vienna, Austria
| | - M. Stöger-Pollach
- Institute
of Materials Chemistry, Institute of Applied Physics, and University Service Center for Transmission
Electron Microscopy, Vienna University of
Technology, Vienna, Austria
| | - R. Schlögl
- Fritz-Haber-Institut der Max-Planck-Gesellschaft,
Berlin, Germany
| | - Y. Suchorski
- Institute
of Materials Chemistry, Institute of Applied Physics, and University Service Center for Transmission
Electron Microscopy, Vienna University of
Technology, Vienna, Austria
| | - G. Rupprechter
- Institute
of Materials Chemistry, Institute of Applied Physics, and University Service Center for Transmission
Electron Microscopy, Vienna University of
Technology, Vienna, Austria
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Suchorski Y, Spiel C, Vogel D, Drachsel W, Schlögl R, Rupprechter G. Local Reaction Kinetics by Imaging: CO Oxidation on Polycrystalline Platinum. Chemphyschem 2010; 11:3231-5. [DOI: 10.1002/cphc.201000599] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Lund CD, Surko CM, Maple MB, Yamamoto SY. Effects of local reactant concentration perturbations in oscillatory catalysis. J Chem Phys 1998. [DOI: 10.1063/1.475946] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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