期刊
ACS NANO
卷 13, 期 11, 页码 12996-13005出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.9b05652
关键词
nanoparticles; in situ exsolution; perovskites; environmental transmission electron microscopy; nanostructuring
类别
资金
- CNRS
- Region Rh'One-Alpes
- GrandLyon
- French Ministry of Research and Higher Education
- METSA network
- Netherlands Organization for Scientific Research (NWO)
- Syngaschem BV
- European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013)/ERC Grant [320725]
- EPSRC [EP/P007767/1, EP/P024807/1, EP/R023921/1]
- EPSRC [EP/P024807/1, EP/P007767/1, EP/R023921/1] Funding Source: UKRI
- European Research Council (ERC) [320725] Funding Source: European Research Council (ERC)
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.
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