Atomic-Resolution HAADF-STEM Study of Ag/Al2O3 Catalysts for Borrowing-Hydrogen and Acceptorless Dehydrogenative Coupling Reactions of Alcohols


We studied HAADF-STEM analysis of Ag/Alumina samples (as-calcined and reduced at 25, 300, 500 and 900 degreeC). 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 increased with the reduction temperature, which was supported by EXAFS analysis. The effect of Ag size on the activity for borrowing-hydrogen and acceptorless dehydrogenative couplings of alcohols was discussed.

Topics in Catalysis

DOI: 10.1007/s11244-016-0695-7

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