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Aqueous‐Phase Synthesis of Single‐Crystal Pd Seeds 3 nm in Diameter and Their Use for the Growth of Pd Nanocrystals with Different Shapes
Author(s) -
Zhu Cun,
Zeng Jie,
Lu Ping,
Liu Jingyue,
Gu Zhongze,
Xia Younan
Publication year - 2013
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201203787
Subject(s) - nanocrystal , aqueous solution , materials science , adsorption , ion , palladium , phase (matter) , chemical engineering , crystal growth , nanotechnology , crystal (programming language) , aqueous two phase system , single crystal , growth rate , crystallography , chemistry , catalysis , organic chemistry , mathematics , geometry , computer science , programming language , engineering
Abstract This article describes an aqueous method for the synthesis of Pd seeds with a single‐crystal structure and a uniform diameter of 3 nm and their use for the growth of Pd nanocrystals with a variety of shapes. We have also investigated the effects of a number of parameters, including the temperature, reducing power of the reductant, and capping agent on the reduction rate of a Pd precursor, and thus the final size, size distribution, and morphology of the Pd seeds. By taking advantage of the coordination effect of Br − ions with Pd 2+ ions and their selective adsorption on the Pd(100) surface, Pd nanocrystals with a number of distinct shapes could be conveniently produced by varying the concentration of KBr added into the growth solution. This work provides a general and facile method for the green synthesis of Pd nanocrystals with controlled shapes, especially for the preparation of Pd nanocrystals with sizes in the sub‐10 nm regime.