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.

中文翻译：

---

分层凹层状三角形PtCu合金纳米结构：树枝状纳米结构的合理整合，可实现高效甲酸电氧化†

由于贵金属不是层结构的材料，因此多维多层贵金属纳米结构的合理构造是一个巨大的挑战。在这里，我们报告一锅法水热合成方法使用DL-肉碱，KI，聚乙烯吡咯烷酮，CuCl ₂和H ₂ PtCl _6的PtCu分级凹层三角形（HCLT）纳米结构。PtCu HCLT纳米结构由多层三角形树枝状晶体组成。通过改变DL-肉碱浓度可调节其层数，并且通过改变H ₂ PtCl ₆ / CuCl ₂可以调节PtCu三角形纳米结构的凹凸度。比率或KI浓度。在某些条件下也可以获得分层的三角双锥体纳米框架。由于其有利的纳米结构和双金属协同作用，与商业化的Pt黑，Pd / C和其他一些纳米结构相比，所获得的PtCu HCLT纳米结构具有增强的电催化活性和对甲酸氧化的延长的稳定性。