In situ observation of nanoparticle exsolution from perovskite oxides : from atomic scale mechanistic insight to nanostructure tailoring
Neagu, Dragos and Kyriakou, Vasileios and Roiban, Ioan-Lucian and Aouine, Mimoun and Tang, Chenyang and Caravaca, Angel and Kousi, Kalliopi and Schreur-Piet, Ingeborg and Metcalfe, Ian S. and Vernoux, Philippe and Van De Sanden, Mauritius C.M. and Tsampas, Mihalis N. (2019) In situ observation of nanoparticle exsolution from perovskite oxides : from atomic scale mechanistic insight to nanostructure tailoring. ACS Nano, 13 (11). pp. 12996-13005. ISSN 1936-0851 (https://doi.org/10.1021/acsnano.9b05652)
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Abstract
Understanding and controlling the formation of nanoparticles at the surface of functional oxide supports is critical for tuning activity and stability for catalytic and energy conversion applications. Here, we use a latest generation environmental transmission electron microscope to follow the exsolution of individual nanoparticles at the surface of perovskite oxides, with ultrahigh spatial and temporal resolution. Qualitative and quantitative analysis of the data reveals the atomic scale processes that underpin the formation of the socketed, strain-inducing interface that confers exsolved particles their exceptional stability and reactivity. This insight also enabled us to discover that the shape of exsolved particles can be controlled by changing the atmosphere in which exsolution is carried out, and additionally, this could also produce intriguing heterostructures consisting of metal-metal oxide coupled nanoparticles. Our results not only provide insight into the in situ formation of nanoparticles but also demonstrate the tailoring of nanostructures and nanointerfaces.
ORCID iDs
Neagu, Dragos ORCID: https://orcid.org/0000-0001-7208-1055, Kyriakou, Vasileios, Roiban, Ioan-Lucian, Aouine, Mimoun, Tang, Chenyang, Caravaca, Angel, Kousi, Kalliopi, Schreur-Piet, Ingeborg, Metcalfe, Ian S., Vernoux, Philippe, Van De Sanden, Mauritius C.M. and Tsampas, Mihalis N.;-
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Item type: Article ID code: 72255 Dates: DateEvent26 November 2019Published21 October 2019Published Online21 October 2019AcceptedSubjects: Technology > Chemical engineering Department: Faculty of Engineering > Chemical and Process Engineering Depositing user: Pure Administrator Date deposited: 05 May 2020 11:32 Last modified: 05 Dec 2024 01:17 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/72255