Single-atom alloy catalysts: structural analysis, electronic properties and catalytic activities,Chemical Society Reviews

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Single-atom alloy catalysts: structural analysis, electronic properties and catalytic activities
Chemical Society Reviews ( IF 40.4 ) Pub Date : 2020-11-10 , DOI: 10.1039/d0cs00844c
Tianjun Zhang _{1,

2,

3,

4,

5} , Andrew G. Walsh _{1,

2,

3,

4} , Jihong Yu _{5,

6,

7,

8,

9} , Peng Zhang _{1,

2,

3,

4}

Affiliation

Monometallic catalysts, in particular those containing noble metals, are frequently used in heterogeneous catalysis, but they are expensive, rare and the ability to tailor their structures and properties remains limited. Traditionally, alloy catalysts have been used instead that feature enhanced electronic and chemical properties at a reduced cost. Furthermore, the introduction of single metal atoms anchored onto supports provided another effective strategy to increase both the atomic efficiency and the chance of tailoring the properties. Most recently, single-atom alloy catalysts have been developed in which one metal is atomically dispersed throughout the catalyst via alloy bonding; such catalysts combine the traditional advantages of alloy catalysts with the new feature of tailoring properties achievable with single atom catalysts. This review will first outline the atomic scale structural analysis on single-atom alloys using microscopy and spectroscopy tools, such as high-angle annular dark field imaging-scanning transmission electron microscopy and extended X-ray absorption fine structure spectroscopy. Next, progress in research to understand the electronic properties of single-atom alloys using X-ray spectroscopy techniques and quantum calculations will be presented. The catalytic activities of single-atom alloys in a few representative reactions will be further discussed to demonstrate their structure–property relationships. Finally, future perspectives for single-atom alloy catalysts from the structural, electronic and reactivity aspects will be proposed.

中文翻译：

单原子合金催化剂：结构分析，电子性能和催化活性

单金属催化剂，特别是含有贵金属的单金属催化剂，常用于多相催化中，但是它们昂贵，稀少，并且调整其结构和性质的能力仍然受到限制。传统上，已经代替使用合金催化剂，其以降低的成本增强了电子和化学性能。此外，将单金属原子锚定在载体上的方法提供了另一种有效的策略，既可以提高原子效率，又可以提高性能。最近，单原子合金催化剂已经开发了其中一种金属原子分散在整个催化剂通过合金结合这种催化剂将合金催化剂的传统优势与单原子催化剂可获得的定制性能的新特征相结合。这篇综述将首先概述使用显微镜和光谱学工具对单原子合金进行原子级结构分析，例如高角度环形暗场成像-扫描透射电子显微镜和扩展X射线吸收精细结构光谱学。接下来，将介绍利用X射线光谱技术和量子计算来理解单原子合金的电子性能的研究进展。将进一步讨论单原子合金在一些代表性反应中的催化活性，以证明其结构与性质之间的关系。最后，从结构，

更新日期：2020-12-09

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