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231223s2009 xx |||||o 00| ||eng c |
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|a 10.1021/la9015383
|2 doi
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|a pubmed24n0639.xml
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|e rakwb
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|a eng
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|a Huang, Jianfeng
|e verfasserin
|4 aut
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|a Ag dendrite-based Au/Ag bimetallic nanostructures with strongly enhanced catalytic activity
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|c 2009
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 03.12.2009
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|a Date Revised 21.11.2013
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|a published: Print
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|a Citation Status MEDLINE
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|a Dendritic Ag/Au bimetallic nanostructures have been synthesized via a galvanic replacement reaction (GRR) of Ag dendrites in a chlorauric acid (HAuCl4) solution. After short periods of time, one obtains structures with protruding flakes; these will mature into very porous structures with little Ag left over. The morphological, compositional, and crystal structural changes involved with reaction time t were analyzed by using scanning and transmission electron microscopy (SEM and TEM, respectively), energy-dispersive X-ray spectrometry (EDX), and X-ray diffraction. High-resolution TEM combined with EDX and selected area electron diffraction confirmed the replacement of Ag with Au. A proposed formation mechanism of the original Ag dendrites developing pores while growing Au flakes cover this underlying structure at longer reaction times is confirmed by exploiting surface-enhanced Raman scattering (SERS). Catalytic reduction of 4-nitrophenol (4-NP) by sodium borohydride (NaBH4) is strongly enhanced, implying promising applications in catalysis
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Borohydrides
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|a Nitrophenols
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|a Silver
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|a sodium borohydride
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|a Vongehr, Sascha
|e verfasserin
|4 aut
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|a Tang, Shaochun
|e verfasserin
|4 aut
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|a Lu, Haiming
|e verfasserin
|4 aut
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|a Shen, Jiancang
|e verfasserin
|4 aut
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|a Meng, Xiangkang
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 25(2009), 19 vom: 06. Okt., Seite 11890-6
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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|g volume:25
|g year:2009
|g number:19
|g day:06
|g month:10
|g pages:11890-6
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|u http://dx.doi.org/10.1021/la9015383
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