Journal
JOURNAL OF CATALYSIS
Volume 271, Issue 2, Pages 155-160Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2010.02.027
Keywords
Au-25(SR)(18) superatom; Stereoselective hydrogenation; Electron-rich Au-13 core; Electron-deficient Au-12 shell
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Funding
- CMU
- AFOSR
- NIOSH
- NSF [CHE-0130903]
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Atomically monodisperse Au-25(SR)(18) (where R=-CH2CH2Ph) nanoparticles are explored as a stereoselective catalyst for hydrogenation of cyclic ketone to one specific isomer of cyclic alcohol product. A complete (similar to 100%) stereoselectivity is obtained. The catalytic performance is correlated with the crystal structure and core-shell electronic nature of Au-25(SR)(18) superatoms, in which the electron-rich Au-13 core activates the C=O bond, whereas the electron-deficient Au-12 shell provides active sites for H-2 adsorption and dissociation. This work demonstrates promising catalytic performance of ultrasmall gold nanoparticles. The atomically precise Au-25(SR)(18) superatom catalyst may be explored as hydrogenation catalysts for some important chemical processes. (C) 2010 Elsevier Inc. All rights reserved.
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