Abstract
We study HAADF-STEM analysis of Ag/Al2O3 samples (as-calcined and reduced at 25, 300, 500 and 900 °C). Ag atoms are classified into subnanoclusters (0.3–1 nm), nanoclusters (1–3 nm), nanoparticles (3–10 nm) and polycrystals (>10 nm). The size of Ag increases with the reduction temperature, which is supported by EXAFS analysis. The effect of Ag size on the activity for borrowing-hydrogen and acceptorless dehydrogenative couplings of alcohols is discussed.
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Acknowledgments
This work was supported by Grant-in-Aids for Scientific Research B (26289299) from MEXT (Japan), a MEXT program “Elements Strategy Initiative to Form Core Research Center” and a Grant-in-Aid for Scientific Research on Innovative Areas “Nano Informatics” (25106010) from JSPS.
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Yoshida, K., Kon, K. & Shimizu, Ki. Atomic-Resolution HAADF-STEM Study of Ag/Al2O3 Catalysts for Borrowing-Hydrogen and Acceptorless Dehydrogenative Coupling Reactions of Alcohols. Top Catal 59, 1740–1747 (2016). https://doi.org/10.1007/s11244-016-0695-7
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DOI: https://doi.org/10.1007/s11244-016-0695-7