State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
Nanoscale. 2018 May 17;10(19):9369-9375. doi: 10.1039/c8nr00385h.
The rational construction of multi-dimensional layered noble metal nanostructures is a great challenge since noble metals are not layer-structured materials. Herein, we report a one-pot hydrothermal synthetic method for PtCu hierarchical concave layered triangular (HCLT) nanostructures using dl-carnitine, KI, poly(vinylpyrrolidone), CuCl2, and H2PtCl6. The PtCu HCLT nanostructure is comprised of multilayered triangular dendrites. Its layer number is tunable by changing dl-carnitine concentrations, and the concavity/convexity of the PtCu triangle nanostructures is tunable by changing the H2PtCl6/CuCl2 ratio or KI concentrations. Hierarchical trigonal bipyramid nanoframes are also obtained under certain conditions. Because of its advantageous nanostructure and bimetallic synergetic effect, the obtained PtCu HCLT nanostructure exhibits enhanced electrocatalytic activity and prolonged stability to formic acid oxidation compared to commercial Pt black, Pd/C and some other nanostructures.
多维层状贵金属纳米结构的合理构建是一个巨大的挑战，因为贵金属不是层状材料。在此，我们报告了一种使用 dl-肉碱、KI、聚乙烯吡咯烷酮、CuCl2 和 H2PtCl6 通过一锅水热合成方法制备 PtCu 分级凹层状三角（HCLT）纳米结构的方法。PtCu HCLT 纳米结构由多层三角树枝状组成。通过改变 dl-肉碱浓度可以调节其层的数量，通过改变 H2PtCl6/CuCl2 比或 KI 浓度可以调节 PtCu 三角纳米结构的凹度/凸度。在某些条件下还可以得到分级三角双锥纳米框架。由于其有利的纳米结构和双金属协同效应，与商业 Pt 黑、Pd/C 和其他一些纳米结构相比，所获得的 PtCu HCLT 纳米结构表现出增强的电催化活性和对甲酸氧化的延长稳定性。
