The crumpling and buckling in nanosheets are anticipated to provide new characteristics that could not be observed in ideal flat layers. However, the rigid lattice structure of inorganic metal oxides limits their assembly into well‐defined crumpled layers. Here, this study demonstrates that at the sub‐nm scale, polyoxometalates (POMs) clusters having well‐defined structures can intercede during the nucleation process of titania and co‐assemble with nuclei to form uniform, large‐sized crumpled binary 2D layers with a thickness of 2 nm. The obtained crumpled layers are then used as a support material to immobilize Pd nanoclusters with an average size of 2 nm. Pd‐immobilized crumpled layers are employed as heterogeneous catalysts for the partial hydrogenation of acetylene. This structurally and compositionally unique heterogeneous catalyst manifests exceptional selectivity to cis‐alkene with almost 100% yield as compared to commercially available titania which only exhibits 10% diphenylacetylene conversion and 42% selectivity in the given period of time.

中文翻译：

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多金属氧酸盐和二氧化钛均匀整合到皱巴巴的层中


预计纳米片中的褶皱和屈曲将提供在理想平面层中无法观察到的新特性。然而，无机金属氧化物的刚性晶格结构限制了它们组装成定义明确的皱巴巴的层。在这里，这项研究表明，在亚纳米尺度上，具有明确结构的多金属氧酸盐 （POM） 簇可以在二氧化钛的成核过程中介入并与原子核共组装，形成厚度为 2 nm 的均匀、大尺寸的皱缩二元 2D 层。然后将获得的皱巴巴的层用作支撑材料，以固定平均尺寸为 2 nm 的 Pd 纳米团簇。Pd 固定化的皱缩层用作乙炔部分氢化的非均相催化剂。这种结构和组成独特的非均相催化剂对顺式烯烃表现出卓越的选择性，与市售的二氧化钛相比，其产率几乎为 100%，而市售二氧化钛在给定时间内仅表现出 10% 的二苯乙炔转化率和 42% 的选择性。