High Yield Seedless Synthesis of High-Quality Gold Nanocrystals with Various Shapes

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• 作者：Jihui Zhang ; Chunxiao Xi ; Cong Feng ; Haibing Xia ; Dayang Wang ; Xutang Tao
• 刊名：Langmuir
• 出版年：2014
• 出版时间：March 11, 2014
• 年：2014
• 卷：30
• 期：9
• 页码：2480-2489
• 全文大小：626K
• 年卷期：v.30,no.9(March 11, 2014)
• ISSN：1520-5827

文摘

In this Article, high-quality gold nanocrystals (Au NCs) with various shapes including concave cubic, trisoctahedral, cubic, rod-like, and quasi-spherical have been successfully produced in high yield via adding a trace amount of NaBH₄ solution into growth solutions mainly composed of HAuCl₄, ascorbic acid, and surfactants. The sizes and shapes of as-prepared Au NCs can be tuned by the compositions of the growth solutions and the amount of NaBH₄ added. The electrocatalytic performance of differently shaped Au NCs for methanol oxidation was studied; as-prepared trisoctahedral or concave cubic Au NCs are more highly active electrocatalysts for methanol oxidation due to the presence of high-index facets on their surface.