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Title
| - Core−Shell Gold Nanoparticle Assembly as NovelElectrocatalyst of CO Oxidation
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Abstract
| - This paper reports findings of an investigation of the electrocatalytic oxidation of carbon monoxide (CO)that occurs at nanocrystal gold cores with thiolate monolayer encapsulation and within a core−shellnetwork assembly. The core−shell and network combinations allow the manipulation of core size propertiesand enhance the stability of nanosized catalysts against the propensity of aggregation while beingcatalytically active. Using alkanedithiolate-linked thin films assembled from two different gold core sizes(2 and 5 nm), we have demonstrated that the capped nanosites are both electrochemically accessible andcatalytically active to CO oxidation upon electrochemical activation. Cyclic voltammetric data are presentedfor assessing the electrocatalytic properties. The results have important implications for the design andtailoring of nanosized gold catalysts via manipulating core−shell chemistry.
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