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Article Dans Une Revue Journal of the American Chemical Society Année : 2016

Birch-Type Hydrogenation of Few-Layer Graphenes: Products and Mechanistic Implications

Résumé

Few-layer graphenes, supported on Si with a superficial oxide layer, were subjected to a Birch-type reduction using Li and H2O as the electron and proton donors, respectively. The extent of hydrogenation for bilayer graphene was estimated at 1.6-24.1% according to Raman and X-ray photoelectron spectroscopic data. While single-layer graphene reacts uniformly, few-layer graphenes were hydrogenated inward from the edges and/or defects. The role of these reactive sites was reflected in the inertness of pristine few-layer graphenes whose edges were sealed. Hydrogenation of labeled bilayer (12C/13C) and trilayer (12C/13C/12C) graphenes afforded products whose sheets were hydrogenated to the same extent, implicating passage of reagents between the graphene layers and equal decoration of each graphene face. The reduction of few-layer graphenes introduces strain, allows tuning of optical transmission and fluorescence, and opens synthetic routes to long sought-after films containing sp3-hybridized carbon.
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Dates et versions

hal-01757294 , version 1 (03-04-2018)

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Xu Zhang, Yuan Huang, Shanshan Chen, Na Yeon Kim, Wontaek Kim, et al.. Birch-Type Hydrogenation of Few-Layer Graphenes: Products and Mechanistic Implications. Journal of the American Chemical Society, 2016, 138 (45), pp.14980-14986. ⟨10.1021/jacs.6b08625⟩. ⟨hal-01757294⟩
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