Facile preparation of a variety of bimetallic dendrites with high catalytic activity by two simultaneous replacement reactions

Herein, two simultaneous replacement reactions were explored to prepare a variety of bimetallic dendrites (AgCu, AgPd, AuPd, CuAu, CuPt and CuPd) in one step, using commercial Mg powder as a sacrificial metal to reduce the bimetallic precursors in aqueous solution. We demonstrate in detail how the m...

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Bibliographic Details
Published in:	RSC advances 2013-01, Vol.3 (34), p.14312-14321
Main Authors:	Liu, Jun, Wu, Qian, Huang, Fuli, Zhang, Hefang, Xu, Shili, Huang, Wei, Li, Zelin
Format:	Article
Language:	eng
Subjects:	Bimetals Copper Copper compounds Dendritic structure Gold compounds Intermetallics Precursors Silver
Online Access:	Get full text
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Summary:	Herein, two simultaneous replacement reactions were explored to prepare a variety of bimetallic dendrites (AgCu, AgPd, AuPd, CuAu, CuPt and CuPd) in one step, using commercial Mg powder as a sacrificial metal to reduce the bimetallic precursors in aqueous solution. We demonstrate in detail how the morphologies and compositions of the bimetallic dendrites are affected by factors such as the potential difference between the metal redox couples, molar ratios of precursors, ligands, reaction times and total precursor concentrations, taking dendritic AgCu as an example. In addition, monometallic Ag and Cu dendrites were also prepared for comparison. The application of these prepared dendrites as high performance catalysts for the reduction of 4-nitrophenol in aqueous solution at room temperature was further explored. The order of activity CuPd > CuPt > CuAu > Cu > Ag sub(1)Cu sub(1) > Ag sub(3)Cu sub(1) > AuPd > Ag sub(1)Cu sub(3) > AgPd > Ag was established for the prepared dendrites based on normalized kinetic parameters according to our proposed formula.
ISSN:	2046-2069 2046-2069