NDLI: Sinter-Resistant Catalysts: Supported Iridium Nanoclusters with Intrinsically Limited Sizes

Content Provider	Springer Nature Link
Author	Lu, Jing Aydin, Ceren Browning, Nigel D. Wang, Lichang Gates, Bruce C.
Copyright Year	2012
Abstract	Results from a wide selection of literature sources reviewed here show that treatments of iridium complexes on various supports under harsh reductive conditions (e.g., 873 K in H2) lead to the formation of only uniform iridium clusters limited to a critical diameter of ~1 nm. The observations have been explained by the results of calculations at the level of density functional theory ory showing that cubic structures of this size are resistant to aggregation because coalescence of two such clusters would require energetically unfavorable rearrangements of their surface atoms, and this point has been reinforced by scanning transmission electron microscopy images demonstrating the non-coalescence behavior of iridium clusters of the critical size—which instead bounce off each other. Here we consider supported iridium catalysts in light of the literature, aiming to (1) demonstrate the generality of the sinter-resistant property of iridium nanoclusters (in contrast to those of other noble metals) and (2) summarize information regarding sample synthesis and preparation methods that lead to supported iridium catalyst with sinter-resistant properties.
Starting Page	1445
Ending Page	1451
Page Count	7
File Format	PDF
ISSN	1011372X
Journal	Catalysis Letters
Volume Number	142
Issue Number	12
e-ISSN	1572879X
Language	English
Publisher	Springer US
Publisher Date	2012-11-06
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Iridium catalyst Supported iridium nanoparticles Sinter-resistant catalyst Transmission electron microscopy Industrial Chemistry/Chemical Engineering Catalysis Organometallic Chemistry Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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