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首页> 美国卫生研究院文献>Molecules >Salt-Mediated Au-Cu Nanofoam and Au-Cu-Pd Porous Macrobeam Synthesis
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Salt-Mediated Au-Cu Nanofoam and Au-Cu-Pd Porous Macrobeam Synthesis

机译：盐介金-铜纳米泡沫和金-铜-钯多孔大梁的合成

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摘要

Multi-metallic and alloy nanomaterials enable a broad range of catalytic applications with high surface area and tuning reaction specificity through the variation of metal composition. The ability to synthesize these materials as three-dimensional nanostructures enables control of surface area, pore size and mass transfer properties, electronic conductivity, and ultimately device integration. Au-Cu nanomaterials offer tunable optical and catalytic properties at reduced material cost. The synthesis methods for Au-Cu nanostructures, especially three-dimensional materials, has been limited. Here, we present Au-Cu nanofoams and Au-Cu-Pd macrobeams synthesized from salt precursors. Salt precursors formed from the precipitation of square planar ions resulted in short- and long-range ordered crystals that, when reduced in solution, form nanofoams or macrobeams that can be dried or pressed into freestanding monoliths or films. Metal composition was determined with X-ray diffraction and energy dispersive X-ray spectroscopy. Nitrogen gas adsorption indicated an Au-Cu nanofoam specific surface area of 19.4 m2/g. Specific capacitance determined with electrochemical impedance spectroscopy was 46.0 F/g and 52.5 F/g for Au-Cu nanofoams and Au-Cu-Pd macrobeams, respectively. The use of salt precursors is envisioned as a synthesis route to numerous metal and multi-metallic nanostructures for catalytic, energy storage, and sensing applications.
机译：多金属和合金纳米材料可通过金属成分的变化实现高表面积和调节反应特异性的广泛催化应用。将这些材料合成为三维纳米结构的能力可以控制表面积，孔径和传质特性，电子电导率以及最终的器件集成度。金铜纳米材料以降低的材料成本提供了可调节的光学和催化性能。 Au-Cu纳米结构，尤其是三维材料的合成方法受到限制。在这里，我们介绍了从盐前体合成的Au-Cu纳米泡沫和Au-Cu-Pd宏观束。由方形平面离子的沉淀形成的盐前体会导致短程和长程有序晶体，当在溶液中还原时，会形成纳米泡沫或大束，可以干燥或压制成独立的整料或薄膜。金属成分通过X射线衍射和能量色散X射线光谱法测定。氮气吸附表明Au-Cu纳米泡沫的比表面积为19.4 m 2 / g。用电化学阻抗光谱法测定的Au-Cu纳米泡沫和Au-Cu-Pd宏束的比电容分别为46.0 F / g和52.5 F / g。盐前体的使用被预想为用于催化，能量存储和传感应用的多种金属和多金属纳米结构的合成途径。

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