Strong metal-support interaction promoted scalable production of thermally stable single-atom catalysts

Single-atom catalysts (SACs) have demonstrated superior catalytic performance in numerous heterogeneous reactions. However, producing thermally stable SACs, especially in a simple and scalable way, remains a formidable challenge. Here, we report the synthesis of Ru SACs from commercial RuO 2 powders...

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Published in:Nature communications 2020-03, Vol.11 (1), p.1263-1263, Article 1263
Main Authors: Liu, Kaipeng, Zhao, Xintian, Ren, Guoqing, Yang, Tao, Ren, Yujing, Lee, Adam Fraser, Su, Yang, Pan, Xiaoli, Zhang, Jingcai, Chen, Zhiqiang, Yang, Jingyi, Liu, Xiaoyan, Zhou, Tong, Xi, Wei, Luo, Jun, Zeng, Chaobin, Matsumoto, Hiroaki, Liu, Wei, Jiang, Qike, Wilson, Karen, Wang, Aiqin, Qiao, Botao, Li, Weizhen, Zhang, Tao
Format: Article
Language:English
Subjects:
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140/146
147/137
639/166/898
639/638/77/884
639/638/77/887
Absorption spectroscopy
Carbon
Catalysis
Catalysts
Dispersion
Humanities and Social Sciences
Industrial applications
Iron
Laboratories
multidisciplinary
Ostwald ripening
Porous materials
Ruthenium oxide
Scanning transmission electron microscopy
Science
Science (multidisciplinary)
Single atom catalysts
Sintering
Thermal stability
Transmission electron microscopy
X ray absorption
X-ray absorption spectroscopy
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Summary:Single-atom catalysts (SACs) have demonstrated superior catalytic performance in numerous heterogeneous reactions. However, producing thermally stable SACs, especially in a simple and scalable way, remains a formidable challenge. Here, we report the synthesis of Ru SACs from commercial RuO 2 powders by physical mixing of sub-micron RuO 2 aggregates with a MgAl 1.2 Fe 0.8 O 4 spinel. Atomically dispersed Ru is confirmed by aberration-corrected scanning transmission electron microscopy and X-ray absorption spectroscopy. Detailed studies reveal that the dispersion process does not arise from a gas atom trapping mechanism, but rather from anti-Ostwald ripening promoted by a strong covalent metal-support interaction. This synthetic strategy is simple and amenable to the large-scale manufacture of thermally stable SACs for industrial applications. Large scale production of thermally stable single-atom catalysts (SACs) remains challenging. Here, the authors report scalable synthesis of Ru SACs by heating physical mixture of commercial RuO 2 and Fe-containing support, which is significantly promoted by strong metal-support interaction.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-020-14984-9