Structural Regulation and Support Coupling Effect of Single‐Atom Catalysts for Heterogeneous Catalysis,Advanced Energy Materials

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Structural Regulation and Support Coupling Effect of Single‐Atom Catalysts for Heterogeneous Catalysis
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2020-07-14 , DOI: 10.1002/aenm.202001482
Daobin Liu _{1,

2} , Qun He ₁ , Shiqing Ding ₁ , Li Song ₁

Affiliation

Single atom catalysts (SACs) that integrate the merits of homogeneous and heterogeneous catalysts have been attracting considerable attention in recent years. The individual metal atoms of SACs can be stabilized on supports through various unsaturated chemical sites or space confinement for achieving the maximized atom utilization efficiency. Aside from the development of strategies for preparing high loading and high purity SACs, another key challenge in this field is precisely manipulating the geometric and electronic structure of catalytically active single metal sites, thus rendering the catalysts exceptionally reactive, selective, and stabile compared to their bulk counterparts. This review summarizes recent advancements in SACs for heterogeneous catalysis from the perspective of local structural regulation and the synergistic coupling effect between metal species and supports. Special emphasis is placed on the elucidation of the catalytic structure‐performance relationship in terms of coordination environment, valence state and metal‐support interactions by advanced characterization and theoretical studies. Select in situ or operando characterization techniques for tracking the SACs’ structure evolution under realistic conditions are highlighted. Finally, the challenges and opportunities are discussed to offer insight into the rational design of more intriguing SACs with high activity and distinct chemoselectivity.

中文翻译：

非均相催化单原子催化剂的结构调控和支撑偶联效应

结合了均相和非均相催化剂优点的单原子催化剂（SAC）近年来引起了相当大的关注。SAC的各个金属原子可通过各种不饱和化学位点或空间限制而稳定在载体上，以实现最大的原子利用效率。除了开发制备高载量和高纯度SAC的策略外，该领域的另一个关键挑战是精确控制催化活性单金属位点的几何和电子结构，从而使其与催化剂相比具有异常的反应性，选择性和稳定性。大量同行。这篇综述总结了从局部结构调节和金属物种与载体之间的协同偶联效应的角度来看，SACs在多相催化方面的最新进展。通过高级表征和理论研究，着重从配位环境，价态和金属-载体相互作用的角度阐明了催化结构与性能的关系。重点介绍了用于在实际条件下跟踪SAC的结构演变的原位或操作表征技术。最后，讨论了挑战和机遇，以深入了解具有较高活性和独特化学选择性的更有趣的SAC的合理设计。通过高级表征和理论研究，着重从配位环境，价态和金属-载体相互作用的角度阐明了催化结构与性能的关系。重点介绍了用于在实际条件下跟踪SAC的结构演变的原位或操作表征技术。最后，讨论了挑战和机遇，以深入了解具有较高活性和独特化学选择性的更有趣的SAC的合理设计。通过高级表征和理论研究，着重从配位环境，价态和金属-载体相互作用的角度阐明了催化结构与性能的关系。重点介绍了用于在实际条件下跟踪SAC的结构演变的原位或操作表征技术。最后，讨论了挑战和机遇，以深入了解具有较高活性和独特化学选择性的更有趣的SAC的合理设计。

更新日期：2020-08-26

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