Single atoms supported on metal oxides for energy catalysis

Single-atom catalysts (SACs) have attracted wide interest from researchers, as they promisingly bridge the gap between homogeneous and heterogeneous catalysts. There are various types of supports reported to anchor single metal atoms. Among them, metal oxides have received much attention because of...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2022-03, Vol.1 (11), p.5717-5742
Main Authors: Li, Runze, Luo, Lei, Ma, Xinlong, Wu, Wenlong, Wang, Menglin, Zeng, Jie
Format: Article
Language:English
Subjects:
Carbon dioxide
Catalysis
Catalysts
Chemical reduction
Electron states
Electronic structure
Hydrogen evolution reactions
Metal oxides
Metals
Oxidation
Oxides
Oxygen reduction reactions
Shift reaction
Single atom catalysts
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Summary:Single-atom catalysts (SACs) have attracted wide interest from researchers, as they promisingly bridge the gap between homogeneous and heterogeneous catalysts. There are various types of supports reported to anchor single metal atoms. Among them, metal oxides have received much attention because of their specific and variable properties. In this review, the unique role of typical oxide supports in anchoring isolated metal atoms and participating in catalysis is emphasized. The interactions between metal atoms and oxide supports are clarified, so as to show how to stabilize the atomic metal sites and adjust the geometric and electronic structure of single atoms reasonably. Accordingly, we highlight and summarize the progress made in the synthesis of SACs in recent years, placing special emphasis on preventing isolated metal atoms from migrating or agglomerating. In addition, the modern characterization technologies of SACs are summarized and discussed, which can provide strong evidence on the geometrical structures and electronic states of SACs. Then the applications of SACs supported on metal oxides in energy catalytic reactions are reviewed, such as CO oxidation, the water-gas shift reaction, CH 4 conversion, CO 2 hydrogenation, oxygen reduction reaction, hydrogen evolution reaction, and CO 2 reduction reaction. Finally, the existing problems and development prospects in this field are discussed. Single-atom catalysts (SACs) have attracted wide interest from researchers, as they promisingly bridge the gap between homogeneous and heterogeneous catalysts.
ISSN:2050-7488
2050-7496
DOI:10.1039/d1ta08016d