Insulin Amyloid Fibrils: An Excellent Platform for Controlled Synthesis of Ultrathin Superlong Platinum Nanowires with High Electrocatalytic Activity
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- 作者：Longgai Zhang ; Na Li ; Faming Gao ; Li Hou ; Ziming Xu
- 刊名：The Journal of the American Chemical Society
- 出版年：2012
- 出版时间：July 18, 2012
- 年：2012
- 卷：134
- 期：28
- 页码：11326-11329
- 全文大小：306K
- 年卷期：v.134,no.28(July 18, 2012)
- ISSN：1520-5126
文摘
Highly uniform single-crystal ultrathin Pt nanowires (UTPtNWs) with a diameter of 1.8 nm and a superhigh aspect ratio of >104 were fabricated using insulin amyloid fibrils (INSAFs) as sacrificial templates. The use of INSAFs to build the UTPtNWs allowed for the preferential exposure of low-energy crystal facets that would be highly advantageous for the methanol oxidation reaction. The UTPtNWs displayed a large electrochemical active surface area of 71.34 m2/g, which is much higher than that of a commercial Pt/C catalyst. The UTPtNWs also maintained excellent electrochemical durability under repeated cyclic voltammetry scans. Because of its exciting high electrochemical activity, UTPtNWs is a promising material for the design of next-generation electrocatalysts and would also be useful in sensing, biomedical, and other electrochemical applications.