Understanding atomically dispersed supported metal catalysts: structure and performance of active sites
Understanding atomically dispersed supported metal catalysts: structure and performance of active sites
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了解原子分散的负载金属催化剂：活性位点的结构和性能
DOI：
10.1039/9781788016971-00166
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Isao Ogino
中科院分区：
文献类型：
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作者：
Seiichiro Yoshida;Shinichiroh Iwamura;Isao Ogino;Shin R. Mukai;Isao Ogino
在负载型催化剂中，金属-载体界面往往起着主导作用。当负载的金属非常小并且由单个或几个原子组成时，金属-载体界面的影响最大化。在这种原子分散的负载型金属催化剂中，载体作为配体并显著影响金属-吸附物和金属-金属相互作用。结果，负载的金属物质的结构响应于反应条件的变化而动态变化。由于负载型金属物种非常小，通常结构不均匀，并且它们的结构动态变化，因此阐明此类催化剂的结构-性能关系具有挑战性。然而，努力改善精确的合成方法，原子表征技术，和理论计算提供了至关重要的基本见解的活性位点的结构，配体的作用，和相邻的金属原子的影响。本章展示了一些旨在加深对原子分散负载型金属催化剂的结构-性能关系的基本理解的研究工作。此外，为了说明这些催化剂的重要性和潜在的机会，新的催化技术，可能使他们，一些最近的研究工作进行了说明。
Metal–support interface often plays dominant roles in supported catalysts. When supported metals are extremely small and consist of single or a few atoms, the effects of metal–support interface are maximized. In such atomically dispersed supported metal catalysts, supports act as ligands and influence the metal–adsorbate and metal–metal interactions significantly. As a result, the structure of supported metal species varies dynamically in response to changes in reaction conditions. Because supported metal species are extremely small, often non-uniform in structure and their structures change dynamically, it is challenging to elucidate the structure–performance relationships of such catalysts. However, efforts to improve precise synthesis methods, atomistic characterization techniques, and theoretical calculations have provided crucial fundamental insights into the structure of active sites, roles of ligands, and effects of neighboring metal atoms. This chapter shows some of the research works aimed to deepen fundamental understanding of the structure–performance relationships of atomically dispersed supported metal catalysts. In addition, to illustrate the importance of such catalysts and prospective opportunities for new catalytic technology that are potentially enabled by them, some recent research works are described.