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Aqueous phase reforming of glycerol using doped graphenes as metal-free catalysts

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Abstract

Boron-doped graphene obtained by pyrolysis at 900 °C of the boric acid ester of alginate was found to be the most active graphene among a series of doped and co-doped graphenes to promote the aqueous phase reforming of glycerol at 250 °C. This reaction is of interest in the context of valorization of the aqueous wastes of carbohydrate syrups. Control experiments adding to undoped graphene 1 wt% of triphenylborane, tris(pentafluorophenyl)borane or bis(pinacolyl)diborane as models of possible boron atom types present in B-doped graphene, and boric acid that could be present in a residual amount after pyrolysis, show in all cases an increase in the catalytic activity of graphene. B-doped graphene has also activity for glucose aqueous phase reforming. B-doped graphene undergoes deactivation upon reuse, probably due to B leaching. The results show that graphenes are promising metal-free catalysts for aqueous phase reforming and are alternatives to those containing platinum.

Graphical abstract: Aqueous phase reforming of glycerol using doped graphenes as metal-free catalysts

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Publication details

The article was received on 07 Apr 2017, accepted on 10 May 2017 and first published on 11 May 2017


Article type: Paper
DOI: 10.1039/C7GC01058C
Citation: Green Chem., 2017, Advance Article
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    Aqueous phase reforming of glycerol using doped graphenes as metal-free catalysts

    I. Esteve-Adell, B. Crapart, A. Primo, P. Serp and H. Garcia, Green Chem., 2017, Advance Article , DOI: 10.1039/C7GC01058C

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