NDLI: Can a Single Atom Serve as the Active Site in Some Heterogeneous Catalysts?

Content Provider	Springer Nature Link
Author	Thomas, John Meurig Saghi, Zineb Gai, Pratibha L.
Copyright Year	2011
Abstract	We examine a number of distinct situations relating to heterogeneous catalysts where either a single atom (or ion), or a very small cluster of atoms functions as the locus of chemical turnover in various distinct kinds of conversion. There is little doubt that individual ions at certain crystallographic sites in nanoporous solids can indeed act as single-site catalysts. The situation concerning nanoclusters of pure metal (or bimetallic entities) is rather more ambiguous. What was hitherto thought to be an effective catalyst made up of a small cluster of Pt supported on γ-Al$_{2}$O$_{3}$ (for hydrogenation) now seems to be a single atom of Pt attached to a 5-coordinated Al$^{III}$ ion. And in the case of Au or Pt on other supports, there is evidence that a single Pt atom, positively charged, but surrounded by alkali-metal ions, is a powerful catalyst for the water–gas shift (CO + H$_{2}$O → H$_{2}$ + CO$_{2}$) reaction. We also report interesting results concerning the mobility of CeO$_{2}$ support material.
Starting Page	588
Ending Page	594
Page Count	7
File Format	PDF
ISSN	10225528
Journal	Topics in Catalysis
Volume Number	54
Issue Number	10-12
e-ISSN	15729028
Language	English
Publisher	Springer US
Publisher Date	2011-05-12
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Single Pt atoms Single ion catalysts CeO$_{2}$ supports Single-site heterogeneous catalysts Bimetallic nanocluster catalysts Oxyfunctionalization of alkanes Physical Chemistry Pharmacy Industrial Chemistry/Chemical Engineering Catalysis Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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