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Showing 1 to 6 of 6 for “"Subnanometer clusters"”.
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Quantitative electron microscopy of supported subnanometer clusters
Small supported particles (a few angstroms in diameter) are useful as catalysts because of their increased surface area for a given volume of material. Their catalytic activity and selectivity depends upon their size, which determines their electronic structure. Therefore, it is vital to reliably …
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Structural and Kinetic Study of Low-temperature Oxidation Reactions on Noble Metal Single Atoms and Subnanometer Clusters
… design of catalysts in the nanometer and subnanometer region. Recent studies showed that catalysts in the subnanometer regime could have extraordinary activity and selectivity. However, the structural performance relationships behind their unique catalytic performances are still unclear. …
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Structure Sensitivity of Alkanes Hydrogenolysis and Alkynes Hydrogenation on Supported Ir Catalysts
… show the difference of Ir nuclearity in the subnanometer regime and nanoparticles (~1.4 nm), while XPS and DRIFTS indicate the difference of electronic properties from metal-support interaction on the two Ir catalysts with the same nuclearity but reduced at different temperatures. Acetylene …
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Structure Sensitivity in the Subnanometer Regime on Pt and Pd Supported Catalysts
… properties. Supported Pt-group single atoms and clusters catalysts in the subnanometer size regime maximize the metal utilization and were reported to have extraordinary activities and/or selectivities compared with nanoparticles for various reactions including hydrogenation reactions. However, …
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Structure Sensitivity of Alkane Hydrogenolysis on Ir/MgAl₂O₄ Catalysts
… atoms is evidently higher than that with the subnanometer clusters in both reactions, but the selectivity to the target product of ethane is not quite dependent on the particle size in the n-butane hydrogenolysis. After the fundamental analysis, it is proposed that the reaction mechanism of …
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Structure-Sensitivity of CO Oxidation Over Supported Pt Catalysts in the Subnanometer Regime and Its Origin
… change with metal nuclearity, especially in the subnanometer regime. It is also important to understand how the catalytic performance can be tuned by conducting surface modification for a certain metal size. Here, we investigate how the reactivity of CO oxidation reaction changes with the size of …