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Title: Single-Atom Alloy Catalysis

Journal Article · · Chemical Reviews

Single-atom alloys (SAAs) play an increasingly significant role in the field of single-site catalysis and are typically composed of catalytically active elements atomically dispersed in more inert and catalytically selective host metals. SAAs have been shown to catalyze a range of industrially important reactions in electro-, photo-, and thermal catalysis studies. Due to the unique geometry of SAAs, the location of the transition state and the binding site of reaction intermediates are often decoupled, which can enable both facile dissociation of reactants and weak binding of intermediates, two key factors for efficient and selective catalysis. Often, this results in deviations from transition metal scaling relationships that limit conventional catalysts. SAAs also offer reduced susceptibility to CO poisoning, cost savings from reduced precious metal usage, opportunities for bifunctional mechanisms via spillover, and higher resistance to deactivation by coking that plagues many industrial catalysts. In this review, we begin by introducing SAAs and describe how model systems and nanoparticle catalysts can be prepared and characterized. We then review all available SAA literature on a per reaction basis before concluding with a description of the general properties of this new class of heterogeneous catalysts and presenting opportunities for future research and development.

Research Organization:
Tufts Univ., Medford, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
SC0004738; SC0012573
OSTI ID:
1635801
Alternate ID(s):
OSTI ID: 1773870; OSTI ID: 1844978
Journal Information:
Chemical Reviews, Vol. 120, Issue 21; ISSN 0009-2665
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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Controlling Hydrogen Activation, Spillover, and Desorption with Pd–Au Single-Atom Alloys journal January 2016
Ring-Opening Transformation of 5-Hydroxymethylfurfural Using a Golden Single-Atomic-Site Palladium Catalyst journal May 2019
Subtle and reversible interactions of ambient pressure H2 with Pt/Cu(111) single-atom alloy surfaces journal January 2019
Using probe molecule FTIR spectroscopy to identify and characterize Pt-group metal based single atom catalysts journal September 2017
An Atomic-Scale View of Palladium Alloys and their Ability to Dissociate Molecular Hydrogen journal October 2010

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Pd-based bimetallic catalysts for parahydrogen-induced polarization in heterogeneous hydrogenations journal April 2021