Freestanding Penta‐Twinned Palladium Nanosheets

Control over the morphology of nanomaterials to have a 2D structure and manipulating the surface strain of nanostructures through defect control have proved to be promising for developing efficient catalysts for sustainable chemical and energy conversion. Here a one‐pot aqueous synthesis route of fr...

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2024-08, Vol.20 (35), p.e2401230-n/a
Main Authors: Ahn, Hojin, Ahn, Hochan, Goo, Bon Seung, Kwon, Yongmin, Kim, Yonghyeon, Wi, Dae Han, Hong, Jong Wook, Lee, Seunghoon, Lee, Young Wook, Han, Sang Woo
Format: Article
Language:English
Subjects:
Atomic structure
Catalysts
Chemical reduction
Chemical synthesis
Compressive properties
Defects
Energy conversion
Nanomaterials
nanosheet
Nanosheets
oxygen reduction
Oxygen reduction reactions
Palladium
palladium catalyst
surface strain
Twin boundaries
twin boundary
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Summary:Control over the morphology of nanomaterials to have a 2D structure and manipulating the surface strain of nanostructures through defect control have proved to be promising for developing efficient catalysts for sustainable chemical and energy conversion. Here a one‐pot aqueous synthesis route of freestanding Pd nanosheets with a penta‐twinned structure (PdPT NSs) is presented. The generation of the penta‐twinned nanosheet structure can be succeeded by directing the anisotropic growth of Pd under the controlled reduction kinetics of Pd precursors. Experimental and computational investigations showed that the surface atoms of the PdPT NSs are effectively under a compressive environment due to the strain imposed by their twin boundary defects. Due to the twin boundary‐induced surface strain as well as the 2D structure of the PdPT NSs, they exhibited highly enhanced electrocatalytic activity for oxygen reduction reaction compared to Pd nanosheets without a twin boundary, 3D Pd nanocrystals, and commercial Pd/C and Pt/C catalysts. Freestanding palladium nanosheets with an unprecedented penta‐twinned structure that can synergistically integrate the promotional effects of 2D structure and twin boundary on catalysis are realized through the precise control of reduction kinetics of metal precursors and structure‐directing agents.
ISSN:1613-6810
1613-6829
1613-6829
DOI:10.1002/smll.202401230