In Situ Observation of Nanoparticle Exsolution from Perovskite Oxides: From Atomic Scale Mechanistic Insight to Nanostructure Tailoring

TitleIn Situ Observation of Nanoparticle Exsolution from Perovskite Oxides: From Atomic Scale Mechanistic Insight to Nanostructure Tailoring
Publication TypeJournal Article
Year of Publication2019
AuthorsD. Neagu, V. Kyriakou, L. Roiban, M. Aouine, C. Tang, A. Caravaca, K. Kousi, I. Schreur, I.S Metcalfe, P. Vernoux, M.CM van de Sanden, M.N Tsampas
JournalACS Nano
Volume13
Issue11
Pagination12996-13005
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.

DOI10.1021/acsnano.9b05652
Division

MaSF

Department

CEPEA

PID

685b0b89946a35651880df11cde8bb9e

Alternate TitleACS Nano

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