Compound Precursors to Mixed Metal Oxides

一种固体与另一种固体在室内发生的反应 温度在固态化学中并不常见。 的 金属氢氧化物与盐的反应是一种特别不寻常的反应。 example. 这种反应被称为盐的吸收， 提供了一种新的合成方法， 表面积（HSA）混合金属氧化物。 这种化合物前体 可以分解成混合氧化物。 因为所有的反应 可以在低温下进行，产品不会 烧结并将保持其多孔特性和相对高 表面积 与市售HSA氧化物相比 (e.g.氧化铝、二氧化硅和沸石）混合的金属氧化物提供了 陶瓷应用的全新材料范围， 催化和新兴材料科学应用。 因为 HSA混合氧化物还没有被广泛使用， 化学未知。 离子交换，扩散依赖 反应，不仅发生在表面附近，而且可能是一个重要的 在混合金属氧化物微晶的内部发生反应。 一 HSA氧化物的相关固有特性是其固体酸 化学. 为了区分表面化学的类型， 从这些新材料中可以预期众所周知的反应， 作为3，3-二甲基丁烯异构化为2，3-二甲基丁烯的方法， 二甲基丁烯、2-和3-甲基戊烯和正己烯将被 研究了

Reactions of one solid with another that occur at room temperature are not common in solid state chemistry. The reaction of metal hydroxides with salts is a particularly unusual example. This reaction they have called salt imbibition and it provides a new synthetic method for the preparation of high surface area (HSA) mixed metal oxides. Such compound precursors can be decomposed to give mixed oxides. Because all reactions can be carried out at low temperature, the products will not sinter and will retain their porous character and relatively high surface area. Compared to commercially available HSA oxides (e.g. aluminas, silicas and zeolites) mixed metal oxides offer an entirely new range of materials for applications in ceramics, catalysis and emerging materials science applications. Because HSA mixed oxides have not been widely available their surface chemistry is unknown. Ion-exchange, a diffusion dependent reaction, occurs not only near the surace but can be an important reaction in the interior of a mixed metal oxide crystallite. A related intrinsic characteristic of a HSA oxide is its solid-acid chemistry. To distinguish the type of surface chemistry that can be expected from these novel materials well known reactions such as the isomerization of 3,3-dimethylbutene to 2,3- dimethylbutenes, 2- and 3-methylpentenes, and n-hexenes will be investigated.