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A general protocol for precise syntheses of ordered mesoporous intermetallic nanoparticles
Nature Protocols ( IF 13.1 ) Pub Date : 2023-09-14 , DOI: 10.1038/s41596-023-00872-1
Hao Lv 1 , Yanzhi Wang 1 , Lizhi Sun 1 , Yusuke Yamauchi 2, 3 , Ben Liu 1
Affiliation  

Intermetallic nanomaterials consist of two or more metals in a highly ordered atomic arrangement. There are many possible combinations and morphologies, and exploring their properties is an important research area. Their strict stoichiometry requirement and well-defined atom binding environment make intermetallic compounds an ideal research platform to rationally optimize catalytic performance. Making mesoporous intermetallic materials is a further advance; crystalline mesoporosity can expose more active sites, facilitate the mass and electron transfer, and provide the distinguished mesoporous nanoconfinement environment. In this Protocol, we describe how to prepare ordered mesoporous intermetallic nanomaterials with controlled compositions, morphologies/structures and phases by a general concurrent template strategy. In this approach, the concurrent template used is a hybrid of mesoporous platinum or palladium and Korea Advanced Institute of Science and Technology-6 (KIT-6) (meso-Pt/KIT-6 or meso-Pd/KIT-6) that can be transformed by the second precursors under reducing conditions. The second precursor can either be a second metal or a metalloid/non-metal, e.g., boron/phosphorus. KIT-6 is a silica scaffold that is removed using NaOH or HF to form the mesoporous product. Procedures for example catalytic applications include the 3-nitrophenylacetylene semi-hydrogenation reaction, p-nitrophenol reduction reaction and electrochemical hydrogen evolution reaction. The synthetic strategy for preparation of ordered mesoporous intermetallic nanoparticles would take almost 5 d; the physical characterization by electron microscope, X-ray diffraction and inductively coupled plasma–mass spectrometry takes ~2 days and the function characterization depends on the research question, but for catalysis it takes 1–5 h.



中文翻译:

有序介孔金属间纳米粒子精确合成的通用方案

金属间纳米材料由高度有序的原子排列的两种或多种金属组成。有许多可能的组合和形态,探索它们的特性是一个重要的研究领域。其严格的化学计量要求和明确的原子结合环境使金属间化合物成为合理优化催化性能的理想研究平台。制备介孔金属间材料是进一步的进步;结晶介孔可以暴露更多的活性位点,促进质量和电子传递,并提供独特的介孔纳米限制环境。在本协议中,我们描述了如何通过通用并发模板策略制备具有受控成分、形态/结构和相的有序介孔金属间纳米材料。在这种方法中,使用的并行模板是介孔铂或钯与韩国科学技术院-6(KIT-6)(介观-Pt / KIT-6或介观-Pd/KIT-6)的混合物,可以可以在还原条件下被第二前体转化。第二前体可以是第二金属或类金属/非金属,例如硼/磷。KIT-6 是一种二氧化硅支架,可使用 NaOH 或 HF 去除以形成介孔产品。例如催化应用的程序包括3-硝基苯乙炔半氢化反应、对硝基苯酚还原反应和电化学析氢反应。制备有序介孔金属间纳米粒子的合成策略需要近5天;通过电子显微镜、X 射线衍射和电感耦合等离子体质谱进行物理表征大约需要 2 天,功能表征取决于研究问题,但对于催化则需要 1-5 小时。

更新日期:2023-09-14
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