Fabrication of Single-Atom Catalysts with Precise Structure and High Metal Loading
Fabrication of Single-Atom Catalysts with Precise Structure and High Metal Loading
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具有精密结构和高金属负载量的单原子催化剂的制备
DOI：
10.1002/adma.201801649
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发表时间：
2018-11-28
影响因子：
29.4
通讯作者：
Li, Yadong
中科院分区：
文献类型：
--
作者：
Wang, Jing;Li, Zhijun;Li, Yadong
近年来，单原子催化剂(SACs)以其最佳的原子利用率和独特的尺寸量子效应，引起了人们的极大兴趣，并被证明是一种很有前途的能量转换和化学转化材料。开发一种通用、简单的合成方法对进一步研究SACS的性质具有重要意义。在这方面，已经发展了几种物理和化学方法来通过改变金属中心之间的相互作用和载体的配位缺陷来访问SACS。SACS在工业应用中面临的共同挑战是准确控制单个站点的局部结构和增加活性站点密度。一方面，原子结构的合理设计对它们的本征活性起着决定性的作用，这将影响反应物在单位上的吸附和活化。另一方面，增加SACS的金属负载量将大大提高活性中心的密度和相应的质量活度，特别是在工业应用中。在这里，重点介绍了合成SACS的方法，重点是这两个挑战。
In recent years, single-atom catalysts (SACs) have attracted particular interest and have been demonstrated to be a promising material in energy conversion and chemical transformation due to their optimal atom utilization and unique size quantum effect. The development of a versatile and simple synthetic approach for SACs is important for further investigation of their properties. In this regard, several physical and chemical methods have been developed to access SACs by varying the interaction between metal centers and the coordination defects of the supports. The common challenges for SACs in industrial applications are accurate control over the local structure of single sites and increasing the active-site density. On one hand, the rational design of the atomic structure is decisive to their intrinsic activity, which will affect the adsorption and activation of reactants over the single sites. On the other hand, increasing the metal loading of SACs would largely enhance the density of active sites and the corresponding mass activity, especially for industrial applications. Here, approaches to the synthesis of SACs-focusing on these two challenges-are highlighted.