Impact of Protector Molecules on the Shape of Pt Nanocrystals Synthesized with K2PtCl6 as the Precursor

Abstract

Abstract: The effect of protector molecules on the formation of tetrahedral Pt nanocrystals during the H₂ reduction of aqueous K₂PtCl₆ solution was investigated. It was shown that the addition of sodium lactate or gluconate, which were good protectors for the synthesis of tetrahedral Ni nanocrystals, cannot result in the formation of tetrahedral Pt nanocrystals. On the other hand, the use of polyvinylpyrrolidone(PVP) for the protector has lead to fairly high selectivity(78%-83%) for the tetrahedral shape of Pt nanocrystals. Raman spectral results indicate that there is an interaction between the C=O group of PVP and the surface of tetrahedral Pt nanocrystals. Such an interaction could be important in inducing the formation of tetrahedral Pt nanocrystals.

Key words: Shape of Pt nanocrystals, Tetrahedral, Protector molecule, Polyvinylpyrrolidone

CLC Number:

TB383
O78

TrendMD:

YU Ying-Tao, XU Bo-Qing . Impact of Protector Molecules on the Shape of Pt Nanocrystals Synthesized with K₂PtCl₆ as the Precursor[J]. Chem. J. Chinese Universities, 2004, 25(12): 2384.

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Impact of Protector Molecules on the Shape of Pt Nanocrystals Synthesized with K₂PtCl₆ as the Precursor

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