Preparation, characterization and catalytic performance of single |
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Preparation, characterization and catalytic performance of single
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Abstract Supported and colloidal single-atom catalysts (SACs), which possess excellent catalytic properties, are particularly important in both fundamental studies and practical applications. The progress made in the preparation methods, characterization, catalytic performances and mechanisms of SACs anchored to metal oxides, two-dimensional materials and the surface of metal nanoclusters (NCs) are reviewed. The different techniques for SAC fabrication, including conventional solution methods based on co-precipitation, incipient wetness co-impregnation, and the chemical vapor deposition method, as well as the newer atom layer deposition (ALD) and galvanic replacement methods, are summarized. The main results from experimental and theoretical studies of various catalytic reactions over SACs, including oxidation reactions, hydrogenation, water gas shift, photocatalytic H2 evolution and electrochemical reactions, are also discussed. Moreover, the electronic properties of the single atoms and their interactions with the supports are described to assist in understanding the origin of the high catalytic activity and selectivity of SACs. Finally, possible future research directions of SACs and their applications are proposed.
中文翻译：
摘要 负载型和胶体单原子催化剂（SACs）具有优异的催化性能，在基础研究和实际应用中都尤为重要。综述了锚定于金属氧化物、二维材料和金属纳米团簇（NCs）表面的 SACs 的制备方法、表征、催化性能和机理等方面的进展。总结了 SAC 制造的不同技术，包括基于共沉淀、初湿共浸的传统溶液方法和化学气相沉积方法，以及较新的原子层沉积 (ALD) 和电流置换方法。SAC 上各种催化反应的实验和理论研究的主要结果，包括氧化反应、氢化、还讨论了水煤气变换、光催化析氢和电化学反应。此外，描述了单个原子的电子特性及其与载体的相互作用，以帮助理解 SAC 的高催化活性和选择性的起源。最后，提出了 SAC 未来可能的研究方向及其应用。 |
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