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  • High catalytic activity of oriented 2.0.0 copper(I) oxide grown on graphene film.

High catalytic activity of oriented 2.0.0 copper(I) oxide grown on graphene film.

Nature communications (2015-10-29)
Ana Primo, Ivan Esteve-Adell, Juan F Blandez, Amarajothi Dhakshinamoorthy, Mercedes Álvaro, Natalia Candu, Simona M Coman, Vasile I Parvulescu, Hermenegildo García
摘要

Metal oxide nanoparticles supported on graphene exhibit high catalytic activity for oxidation, reduction and coupling reactions. Here we show that pyrolysis at 900 °C under inert atmosphere of copper(II) nitrate embedded in chitosan films affords 1.1.1 facet-oriented copper nanoplatelets supported on few-layered graphene. Oriented (1.1.1) copper nanoplatelets on graphene undergo spontaneous oxidation to render oriented (2.0.0) copper(I) oxide nanoplatelets on few-layered graphene. These films containing oriented copper(I) oxide exhibit as catalyst turnover numbers that can be three orders of magnitude higher for the Ullmann-type coupling, dehydrogenative coupling of dimethylphenylsilane with n-butanol and C-N cross-coupling than those of analogous unoriented graphene-supported copper(I) oxide nanoplatelets.

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