Morphology-dependent nanocatalysis: metal particles
Morphology-dependent nanocatalysis: metal particles
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形态依赖的纳米催化：金属颗粒
DOI：
10.1039/c0dt01404d
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发表时间：
2011-01-01
影响因子：
4
通讯作者：
Shen, Wenjie
中科院分区：
文献类型：
--
作者：
Li, Yong;Liu, Qiying;Shen, Wenjie
材料科学的快速发展使金属和金属氧化物颗粒的尺寸和形状可以在纳米级进行裁剪。因此，纳米催化正经历着爆炸性的发展，催化剂颗粒的大小和形状对反应性能有很大的影响。金属纳米颗粒的尺寸效应被解释为几何和电子性质的变化，这些变化支配着反应物的吸附和活化以及产物的脱附。同时，也证实了由暴露晶面决定的催化剂颗粒的形态也对催化行为有很大影响。这被称为形态相关纳米催化：具有各向异性形状的催化剂颗粒通过选择性地暴露特定的晶面来改变反应性能。本文首先综述了贵金属颗粒的形态依赖纳米催化的最新进展，以强调形态效应的化学本质。然后，考察了尺寸/形貌可控的过渡金属粒子的制备，并将其形状与其催化性能进行了关联，目的是阐明结构与反应活性之间的关系。最后，展望了我们对形态相关的金属粒子纳米催化概念的个人观点，这是多相催化领域中一个迅速发展的话题。
The rapid development of materials science now enables tailoring of metal and metal oxide particles with tunable size and shape at the nanometre level. As a result, nanocatalysis is undergoing an explosive growth, and it has been seen that the size and shape of a catalyst particle tremendously affects the reaction performance. The size effect of metal nanoparticles has been interpreted in terms of the variation in geometric and electronic properties that governs the adsorption and activation of the reactants as well as the desorption of the products. At the same time, it has been verified that the morphology of a catalyst particle, determined by the exposed crystal planes, also considerably affects the catalytic behavior. This is termed as morphology-dependent nanocatalysis: a catalyst particle with an anisotropic shape alters the reaction performance by selectively exposing specific crystal facets. This perspective article initially surveys the recent progress on morphology-dependent nanocatalysis of precious metal particles to emphasise the chemical nature of the morphology effect. Then, the fabrication of transition metal particles with controllable size/morphology is examined, and their shape is correlated with their catalytic properties, with the aim to clarify the structure-reactivity relationship. Finally, the future outlook presents our personal perspectives on the concept of morphology-dependent nanocatalysis of metal particles, which is a rapidly growing topic in heterogeneous catalysis.