AI Article Synopsis
- The text discusses a novel catalyst design called a single-atom nest, where single atoms are closely placed to enhance efficiency by minimizing steric hindrance in reactions.
- A specific example using platinum (Pt) single-atom nests on a titanium oxide (TiO) photocatalyst shows significant improvements in methane coupling efficiency, achieving a CH yield of 251.6 μmol g h and a turnover frequency of 20 h, which is 3.2 times better than traditional Pt single-atom catalysts.
- Computational studies demonstrate that this new structure lowers the energy barriers for activating methane, thereby enhancing the overall reaction process.
Article Abstract
This work introduces a new strategy of a single-atom nest catalyst, whereby several single atoms are positioned closely, aiming to achieve the dual benefits of high atom-utilization efficiency while avoiding the steric hindrance in the coupling reaction. As a proof of concept, Pt single-atom nests, where the adjacent Pt single atoms are approximately 4 Å apart, are precisely engineered on the TiO photocatalyst for photocatalytic non-oxidative coupling of methane. The Pt single-atom nest photocatalyst demonstrates remarkable activity, achieving a CH yield and turnover frequency of 251.6 μmol g h and 20 h, respectively, representing a 3.2-fold improvement compared to the Pt single-atom photocatalyst. Density functional theory calculations reveal that the Pt single-atom nest can significantly decrease the energy barrier for the activation of both CH molecules in the coupling process.
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| http://dx.doi.org/10.1021/jacs.4c08901 | DOI Listing |
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