Journal
ADVANCED ENERGY MATERIALS
Volume 10, Issue 32, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202001482
Keywords
heterogeneous catalysis; in situ; operando characterization; metal-support interactions; single atom catalysts; structure regulation
Categories
Funding
- National Key R&D Program of China [2017YFA0303500]
- NSFC [U1932201, 21727801, 21978278, 51902303]
- Anhui Provincial Natural Science Foundation [1908085QB51]
- International Partnership Program of CAS [211134KYSB20190063]
- CAS Collaborative Innovation Program of Hefei Science Center [2019HSC-CIP002]
- CAS Key Research Program of Frontier Sciences [QYZDB-SSW-SLH018]
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University (111 Project) [B12015]
- NSFC-MAECI [51861135202]
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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.
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