title: Efficient and selective hydrogen generation from bioethanol using ruthenium pincer-type complexes.
abstract: Catalytic generation of hydrogen from aqueous ethanol solution proceeds in the presence of pincer-type transition metal catalysts. Optimal results are obtained applying a [Ru(H)(Cl)(CO)(iPr2PEtN(H)EtPiPr2)] complex (catalyst TON 80,000) in the presence of water and base. This dehydrogenation reaction provides up to 70% acetic acid in a selective manner. For the first time, it is shown that bioethanol obtained from fermentation processes can be used directly in this protocol without the need for water removal. The produced hydrogen can be directly utilized in proton exchange membrane (PEM) fuel cells, since very low amounts of CO are formed.
authors.affiliation: Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Str. 29a, 18059 Rostock (Germany), Fax: (+49) 381-1281-5000.
authors.forename: Peter
authors.initials: P
authors.lastname: Sponholz
authors.forename: Dörthe
authors.initials: D
authors.lastname: Mellmann
authors.forename: Christoph
authors.initials: C
authors.lastname: Cordes
authors.forename: Pamela G
authors.initials: PG
authors.lastname: Alsabeh
authors.forename: Bin
authors.initials: B
authors.lastname: Li
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.forename: Martin
authors.initials: M
authors.lastname: Nielsen
authors.forename: Henrik
authors.initials: H
authors.lastname: Junge
authors.forename: Pierre
authors.initials: P
authors.lastname: Dixneuf
authors.forename: Matthias
authors.initials: M
authors.lastname: Beller
mesh_terms: D056804:Biofuels; D002384:Catalysis; D000431:Ethanol / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*; D013379:Substrate Specificity
chemical_list: D056804:Biofuels; D009942:Organometallic Compounds; D000431:Ethanol; D012428:Ruthenium; D006859:Hydrogen
keywords: acetic acid; homogeneous catalysis; hydrogen generation; renewable resources; ruthenium