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Zeininger J, Winkler P, Raab M, Suchorski Y, Prieto MJ, Tănase LC, de Souza Caldas L, Tiwari A, Schmidt T, Stöger-Pollach M, Steiger-Thirsfeld A, Roldan Cuenya B, Rupprechter G. Pattern Formation in Catalytic H 2 Oxidation on Rh: Zooming in by Correlative Microscopy. ACS Catal 2022; 12:11974-11983. [PMID: 36249872 PMCID: PMC9552168 DOI: 10.1021/acscatal.2c03692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/31/2022] [Indexed: 11/29/2022]
Abstract
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Spatio-temporal nonuniformities in H2 oxidation
on individual
Rh(h k l) domains of a polycrystalline Rh foil were studied in the 10–6 mbar pressure range by photoemission electron microscopy
(PEEM), X-ray photoemission electron microscopy (XPEEM), and low-energy
electron microscopy (LEEM). The latter two were used for in situ correlative
microscopy to zoom in with significantly higher lateral resolution,
allowing detection of an unusual island-mediated oxygen front propagation
during kinetic transitions. The origin of the island-mediated front
propagation was rationalized by model calculations based on a hybrid
approach of microkinetic modeling and Monte Carlo simulations.
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Affiliation(s)
- Johannes Zeininger
- Institute of Materials Chemistry, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria
| | - Philipp Winkler
- Institute of Materials Chemistry, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria
| | - Maximilian Raab
- Institute of Materials Chemistry, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria
| | - Yuri Suchorski
- Institute of Materials Chemistry, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria
| | - Mauricio J. Prieto
- Department of Interface Science, Fritz-Haber-Institut der Max-Planck Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Liviu C. Tănase
- Department of Interface Science, Fritz-Haber-Institut der Max-Planck Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Lucas de Souza Caldas
- Department of Interface Science, Fritz-Haber-Institut der Max-Planck Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Aarti Tiwari
- Department of Interface Science, Fritz-Haber-Institut der Max-Planck Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Thomas Schmidt
- Department of Interface Science, Fritz-Haber-Institut der Max-Planck Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Michael Stöger-Pollach
- University Service Center for Transmission Electron Microscopy, TU Wien, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria
| | - Andreas Steiger-Thirsfeld
- University Service Center for Transmission Electron Microscopy, TU Wien, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria
| | - Beatriz Roldan Cuenya
- Department of Interface Science, Fritz-Haber-Institut der Max-Planck Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Günther Rupprechter
- Institute of Materials Chemistry, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria
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Rafti M, Imbihl R. Excitability in the H 2+O 2reaction on a Rh(110) surface induced by high coverages of coadsorbed potassium. J Chem Phys 2014; 141:214707. [DOI: 10.1063/1.4903187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Matías Rafti
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA-CONICET), Fac. Cs. Exactas, Universidad Nacional de La Plata, 64 y Diag. 113 (1900) La Plata, Argentina
| | - Ronald Imbihl
- Institut für Physikalische Chemie und Elektrochemie, Leibniz Universität Hannover, Callinstr. 3-3a, D-30167 Hannover, Germany
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