Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, P. R. China.
J Am Chem Soc. 2012 Jul 18;134(28):11326-9. doi: 10.1021/ja302959e. Epub 2012 Jul 2.
Highly uniform single-crystal ultrathin Pt nanowires (UTPtNWs) with a diameter of ~1.8 nm and a superhigh aspect ratio of >10(4) 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 m(2)/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.
采用胰岛素原纤维（INSAFs）作为牺牲模板，制备出直径约为 1.8nm、超高纵横比大于 10^4 的高度均匀的单晶超薄 Pt 纳米线（UTPtNWs）。利用 INSAFs 构建 UTPtNWs，可以优先暴露低能晶面，这对甲醇氧化反应非常有利。UTPtNWs 的电化学活性表面积高达 71.34m^2/g，远高于商用 Pt/C 催化剂。UTPtNWs 在重复循环伏安扫描下也保持了优异的电化学耐久性。由于其高电化学活性，UTPtNWs 是设计下一代电催化剂的有前途的材料，在传感、生物医学和其他电化学应用中也将很有用。
