NDLI: Ferric hydroxide supported gold subnano clusters or quantum dots : enhanced catalytic performance in chemoselective hydrogenation

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Ma, Yubo Zhang, Juan Deng, Youquan Qiao, Botao Liu, Lequan
Description	Author Affiliation: Liu L ( Centre for Green Chemistry and Catalysis, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.)
Abstract	An attempt to prepare ferric hydroxide supported Au subnano clusters via modified co-precipitation without any calcination was made. High resolution transmission electron microscopy ( HRTEM ), X-ray diffraction ( XRD ) and X-ray photoelectron spectroscopy ( XPS ) have been employed to study the structure and chemical states of these catalysts . No Au species could be observed in the HRTEM image nor from the XRD pattern , suggesting that the sizes of the Au species in and on the ferric hydroxide support were less than or around 1 nm. Chemoselective hydrogenation of aromatic nitro compounds and α,β-unsaturated aldehydes was selected as a probe reaction to examine the catalytic properties of this catalyst . Under the same reaction conditions, such as 100 °C and 1 MPa $H_{2}$ in the hydrogenation of aromatic nitro compounds , a 96–99% conversion (except for 4-nitrobenzonitrile ) with 99% selectivity was obtained over the ferric hydroxide supported Au catalyst , and the TOF values were 2–6 times higher than that of the corresponding ferric oxide supported catalyst with 3–5 nm size Au particles. For further evaluation of this Au catalyst in the hydrogenation of citral and cinnamaldehyde , selectivity towards unsaturated alcohols was 2–20 times higher than that of the corresponding ferric oxide Au catalyst .
ISSN	14779226
Journal	Dalton Trans.
Issue Number	19
e-ISSN	13645447
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2008-05-21
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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