NDLI: A simple and convenient approach for preparing core–shell-like silica@nickel species nanoparticles: highly efficient and stable catalyst for the dehydrogenation of 1,2-cyclohexanediol to catechol

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Liu, Ya-juan Li, An Liu, Wei Chen, Bao-hui Chao, Zi-sheng
Description	Author Affiliation: Chen BH ( College of Chemistry and Chemical Engineering, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, China. zschao@yahoo.com.)
Abstract	A simple and convenient approach denoted as gel-deposition–precipitation (G-D–P) for the preparation of core–shell-like silica@nickel species nanoparticles was studied systematically. Core–shell-like silica@nickel species nanoparticles consisted of a Si-rich core and a Ni-rich shell. The G-D–P process included two steps: one was the deposition–precipitation of nickel over the gelled colloidal silica particle, generating core–shell-like silica@nickel species nanoparticles, and the other was the aging period. It was found that the nickel phyllosilicate layer was formed mainly during the aging period and served as the protective cover to resist against aggregation of the nanoparticles, which could be utilized for regulating the dispersion of nickel over the silica@nickel species nanoparticles. In the present paper, the silica@nickel species nanoparticles were used as the catalysts for preparing catechol via dehydrogenation of 1,2-cyclohexanediol. Their catalytic activity and long-term stability were compared to those of a catalyst prepared by a conventional deposition–precipitation (D–P) approach. The higher activity and better stability of the title reaction over the silica@nickel species nanoparticles catalyst prepared by G-D–P than those over the catalyst prepared by D–P could be due to the higher dispersion of metallic nickel stabilized by the layers of nickel phyllosilicates. Moreover, it was found that the dehydrogenation of 1,2-cyclohexanediol to catechol was a structurally sensitive reaction.
ISSN	14779226
Issue Number	3
Journal	Dalton Trans.
Volume Number	44
e-ISSN	13645447
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2015-01-21
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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