Metal aerogels are emerging porous materials composed entirely of nanostructured metals, which manifest broad prospects in diverse fields. Particularly, multimetallic aerogels (MMAs) receive increasing attention due to their widely tunable properties stimulated by the synergy of multiple metals. However, the investigation of multimetallic effects in MMAs is predominantly restricted to optimizing their application performances. Here, the untrivial multimetallic effects on the synthetic aspect are discovered, and the underlying mechanisms are unveiled, offering new perspectives for manipulating the sol-gel process and tuning the ligament size (dL) of MMAs by designing the average bulk density (ρab) and atomic radius (ra) mismatch. Moreover, a sedimentation-based non-destructive method is established, which solves the long-lasting challenge of preparing intact metal-gel-based electrocatalysts and yields record-high performances toward alcohol oxidation reactions.

中文翻译：

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操纵多金属效应：将尺寸定制的金属气凝胶编程为自立式电催化剂


金属气凝胶是完全由纳米结构金属组成的新兴多孔材料，在不同领域具有广阔的前景。特别是，多金属气凝胶 （MMA） 因其在多种金属的协同作用下具有广泛的可调特性而受到越来越多的关注。然而，对 MMA 中多金属效应的研究主要限于优化其应用性能。在这里，发现了对合成方面微不足道的多金属效应，并揭示了潜在的机制，通过设计平均体积密度 （ρab） 和原子半径 （ra） 错配，为操纵溶胶-凝胶过程和调整 MMA 的韧带大小 （dL） 提供了新的视角。此外，建立了一种基于沉降的无损方法，解决了制备完整金属凝胶基电催化剂的长期挑战，并在醇氧化反应方面产生了创纪录的性能。