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Supported bimetallic nanoparticles used for various chemical transformations appear to be more appealing than their monometallic counterparts, because of their unique properties mainly originating from the synergistic effects between the two different metals. Exsolution, a relatively new preparation method for supported nanoparticles, has earned increasing attention for bimetallic systems in the past decade, not only due to the high stability of the resulting nanoparticles but also for the potential to control key particle properties (size, composition, structure, morphology, etc.). In this review, we summarize the trends and advances on exsolution of bimetallic systems and provide prospects for future studies in this field. [ABSTRACT FROM AUTHOR]

Metal nanoparticles prepared by exsolution at the surface of perovskite oxides have been recently shown to enable new dimensions in catalysis and energy conversion and storage technologies owing to their socketed, well-anchored structure. Here we show that contrary to general belief, exsolved particles do not necessarily re-dissolve back into the underlying perovskite upon oxidation. Instead, they may remain pinned to their initial locations, allowing one to subject them to further chemical transformations to alter their composition, structure and functionality dramatically, while preserving their initial spatial arrangement. We refer to this concept as chemistry at a point and illustrate it by tracking individual nanoparticles throughout various chemical transformations. We demonstrate its remarkable practical utility by preparing a nanostructured earth abundant metal catalyst which rivals platinum on a weight basis over hundreds of hours of operation. Our concept enables the design of compositionally diverse confined oxide particles with superior stability and catalytic reactivity. [ABSTRACT FROM AUTHOR]

Bimetallic exsolution, catalysis, electrochemistry, energy conversion, nanomaterials In the Minireview on page 6666, C. Tang, K. Kousi, D. Neagu, and I. S. Metcalfe review the, approximately, 70 studies published so far, on bimetallic exsolution and identified research trends in this area. Keywords: bimetallic exsolution; catalysis; electrochemistry; energy conversion; nanomaterials EN bimetallic exsolution catalysis electrochemistry energy conversion nanomaterials 1 1 1 04/19/21 20210416 NES 210416 B Exsolution is a relatively new research hotspot b which can be traced back to 2002. [Extracted from the article]