In:
Small, Wiley, Vol. 17, No. 40 ( 2021-10)
Abstract:
In this paper, the N , N ‐dimethylformamide (DMF)‐assisted shape evolution of highly uniform and shape‐pure copper nanocrystals (Cu NCs) is presented for the first time. Colloidal Cu NCs are synthesized via the disproportionation reaction of copper (I) bromide in the presence of a non‐polar solvent mixture. It is observed that the shape of Cu NCs is systematically controlled by the addition of different amounts of DMF to the reaction mixture in high‐temperature reaction conditions while maintaining a high size uniformity and shape purity. With increasing amount of DMF in the reaction mixture, the morphology of the Cu NCs change from a cube enclosed by six {100} facets, to a sphere with mixed surface facets, and finally, to an octahedron enclosed by eight {111} facets. The origin of this shape evolution is understood via first‐principles density functional theory calculations, which allows the study of the change in the relative surface stability according to surface‐coordinating adsorbates. Further, the shape‐dependent plasmonic properties are systematically investigated with highly uniform and ligand‐exchanged colloidal Cu NCs dispersed in acetonitrile. Finally, the facet‐dependent electrocatalytic activities of the shape‐controlled Cu NCs are investigated to reveal the activities of the highly uniform and shape‐pure Cu NCs in the methanol oxidation reaction.
Type of Medium:
Online Resource
ISSN:
1613-6810
,
1613-6829
DOI:
10.1002/smll.202103302
Language:
English
Publisher:
Wiley
Publication Date:
2021
detail.hit.zdb_id:
2168935-0
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