The edge sites of NiMoS are highly catalytically active and are preferred over the surfaces. However, the stacking of the NiMoS layers is thermodynamically favored and limits the exposure of the active surface. Herein, we engineer the nanoflower structure to expose surface active sites through the synthesis of NiMoS nanoflowers assembled from ultrathin nanosheets. The well‐controlled fabrication of small NiMoS nanoflowers under the assistance of small silica nanospheres exposes abundant active sites. The exposed active sites and high surface area lead to superior hydrodesulfurization performance.

中文翻译：

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用于加氢脱硫的NiMoS纳米花的尺寸可控合成–二氧化硅纳米球的空间限制效应

NiMoS的边缘部位具有很高的催化活性，在表面上是优选的。然而，NiMoS层的堆叠在热力学上是有利的并且限制了活性表面的暴露。本文中，我们通过合成由超薄纳米片组装而成的NiMoS纳米花，设计了纳米花结构，以暴露表面活性位点。在小的二氧化硅纳米球的帮助下，对NiMoS纳米小花的良好控制的制备可暴露出大量的活性位点。暴露的活性位点和高表面积导致优异的加氢脱硫性能。