Here we report on the thermal properties of Mg−Ni‐phyllosilicate nanoscrolls as a promising precursor for production of Ni/silicate composite catalysts. Spontaneous scrolling of the phyllosilicate layer originating from size difference between metal‐oxygen and silica sheets provides high surface area of the catalyst. Metal nanoparticles can be obtained directly from the matrix by H₂ reduction. The phyllosilicate structure passed through a number of transformations including partial dehydroxylation with formation of sepiolite‐like phase followed by silicate or oxide crystallization. Temperature ranges of these transitions overlapped with the reduction process sophisticating the H₂ consumption profiles. In particular, some amount of Ni²⁺ got sealed up by the sepiolite structural features, that opened a path for the tuning of Ni⁰ : Ni²⁺ ratio of the catalyst. An increase of Ni content in the system yielded a decrease in the metal nanoparticles sizes due to both high intensity of nucleation and type of residual matrix. Ni nanoparticles size distribution and specific surface area of the composite catalysts governed conversion rate of hexene‐1 and acetone hydrogenation. In the view of the turnover frequency MgNi₂Si₂O₅(OH)₄ precursors were slightly more preferable than pure Ni₃Si₂O₅(OH)₄.

中文翻译：

---

Mg-Ni-页硅酸盐纳米卷的热行为及其在己烯-1和丙酮加氢中所得复合材料的性能

在这里，我们报告了Mg-Ni-页硅酸盐纳米卷的热性能，作为生产Ni /硅酸盐复合催化剂的有前途的前体。源于金属氧和二氧化硅片之间尺寸差异的页硅酸盐层的自发滚动提供了高表面积的催化剂。金属纳米颗粒可以通过H ₂还原直接从基质中获得。层状硅酸盐结构经历了许多转变，包括部分脱羟基并形成海泡石样相，然后发生硅酸盐或氧化物结晶。这些转变的温度范围与还原过程重叠，从而复杂化了H ₂消耗曲线。特别是一些Ni ²⁺被海泡石的结构特征所密封，为调节催化剂的Ni ⁰  ：Ni ²⁺比例开辟了道路。由于高成核强度和残留基质的类型，体系中Ni含量的增加导致金属纳米颗粒尺寸的减小。镍纳米粒子的尺寸分布和复合催化剂的比表面积决定着己烯-1和丙酮加氢的转化率。考虑到周转频率，MgNi ₂ Si ₂ O ₅（OH）₄前体比纯Ni ₃ Si ₂ O ₅（OH）₄更优选。