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

ABSTRACT: 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 RuO2 powders by physical mixing of sub-micron RuO2 aggregates with a MgAl1.2Fe0.8O4 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.

SUBMITTER: Liu K 

PROVIDER: S-EPMC7062790 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature

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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<sub>2</sub> powders by physical mixing of sub-micron RuO<sub>2</sub> aggregates with a MgAl<sub>1.2</sub>Fe<sub>0.8</sub>O<sub>4</sub> spinel. Atomically dispersed Ru is confirmed by aberration-corrected scann  ...[more]

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