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Grinter DC, Thornton G. Structure and reactivity of model CeO 2surfaces. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:253001. [PMID: 35287117 DOI: 10.1088/1361-648x/ac5d89] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 03/14/2022] [Indexed: 06/14/2023]
Abstract
As a key component in many industrial heterogeneous catalysts, the surface structure and reactivity of ceria, CeO2, has attracted a lot of attention. In this topical review we discuss some of the approaches taken to form a deeper understanding of the surface physics and chemistry of this important and interesting material. In particular, we focus on the preparation of ultrathin ceria films, nanostructures and supported metal nanoparticles. Cutting-edge microscopic and spectroscopic experimental techniques are highlighted which can probe the behaviour of oxygen species and atomic defects on these model surfaces.
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Affiliation(s)
- David C Grinter
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, United Kingdom
| | - Geoff Thornton
- Department of Chemistry and London Centre for Nanotechnology, University College London, London WC1H 0AJ, United Kingdom
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Rodriguez JA, Liu P, Graciani J, Senanayake SD, Grinter DC, Stacchiola D, Hrbek J, Fernández-Sanz J. Inverse Oxide/Metal Catalysts in Fundamental Studies and Practical Applications: A Perspective of Recent Developments. J Phys Chem Lett 2016; 7:2627-2639. [PMID: 27327114 DOI: 10.1021/acs.jpclett.6b00499] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Inverse oxide/metal catalysts have shown to be excellent systems for studying the role of the oxide and oxide-metal interface in catalytic reactions. These systems can have special structural and catalytic properties due to strong oxide-metal interactions difficult to attain when depositing a metal on a regular oxide support. Oxide phases that are not seen or are metastable in a bulk oxide can become stable in an oxide/metal system opening the possibility for new chemical properties. Using these systems, it has been possible to explore fundamental properties of the metal-oxide interface (composition, structure, electronic state), which determine catalytic performance in the oxidation of CO, the water-gas shift and the hydrogenation of CO2 to methanol. Recently, there has been a significant advance in the preparation of oxide/metal catalysts for technical or industrial applications. One goal is to identify methods able to control in a precise way the size of the deposited oxide particles and their structure on the metal substrate.
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Affiliation(s)
- José A Rodriguez
- Chemistry Department, Brookhaven National Laboratory , Upton, New York 11776, United States
- Department of Chemistry, State University of New York (SUNY) , Stony Brook, New York 11749, United States
| | - Ping Liu
- Chemistry Department, Brookhaven National Laboratory , Upton, New York 11776, United States
- Department of Chemistry, State University of New York (SUNY) , Stony Brook, New York 11749, United States
| | - Jesús Graciani
- Departamento de Química Física, Universidad de Sevilla , Sevilla 41012, Spain
| | - Sanjaya D Senanayake
- Chemistry Department, Brookhaven National Laboratory , Upton, New York 11776, United States
| | - David C Grinter
- Chemistry Department, Brookhaven National Laboratory , Upton, New York 11776, United States
| | - Dario Stacchiola
- Chemistry Department, Brookhaven National Laboratory , Upton, New York 11776, United States
| | - Jan Hrbek
- Chemistry Department, Brookhaven National Laboratory , Upton, New York 11776, United States
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