Spontaneous Emulsification of Organometallic Complexes Applied to the Synthesis of Nanocapsules Active for H2 Release from Ammonia-BoraneClick to copy article linkArticle link copied!
- Olivier GazilOlivier GazilUniversity of Rennes, CNRS, ISCR-UMR6226, F-35000 Rennes, FranceCREPEC, Department of Chemical Engineering, Polytechnique Montréal, C.P. 6079 Succursale Centre-Ville, Montréal, Québec H3C 3A7, CanadaMore by Olivier Gazil
- Ludivine RaultLudivine RaultUniversity of Rennes, CNRS, ScanMAT UAR 2025, F-35000 Rennes, FranceMore by Ludivine Rault
- Déborah IglickiDéborah IglickiUniversity of Rennes, CNRS, ISCR-UMR6226, F-35000 Rennes, FranceMore by Déborah Iglicki
- Vincent CollièreVincent CollièreLCC−CNRS, UPR8241, 205 Route de Narbonne, 31077 Toulouse Cedex 4, FranceMore by Vincent Collière
- Gizem KaracaoglanGizem KaracaoglanUniversité de Bourgogne, ICMUB-UMR CNRS 6302, 21078 Dijon Cedex, FranceMore by Gizem Karacaoglan
- Didier PoinsotDidier PoinsotUniversité de Bourgogne, ICMUB-UMR CNRS 6302, 21078 Dijon Cedex, FranceMore by Didier Poinsot
- Moad BouzidMoad BouzidUniversité de Bourgogne, ICMUB-UMR CNRS 6302, 21078 Dijon Cedex, FranceMore by Moad Bouzid
- Jean-Cyrille Hierso*Jean-Cyrille Hierso*Email: [email protected]Université de Bourgogne, ICMUB-UMR CNRS 6302, 21078 Dijon Cedex, FranceMore by Jean-Cyrille Hierso
- Myrtil L. KahnMyrtil L. KahnLCC−CNRS, UPR8241, 205 Route de Narbonne, 31077 Toulouse Cedex 4, FranceMore by Myrtil L. Kahn
- Nick VirgilioNick VirgilioCREPEC, Department of Chemical Engineering, Polytechnique Montréal, C.P. 6079 Succursale Centre-Ville, Montréal, Québec H3C 3A7, CanadaMore by Nick Virgilio
- Fabienne Gauffre*Fabienne Gauffre*Email: [email protected]University of Rennes, CNRS, ISCR-UMR6226, F-35000 Rennes, FranceMore by Fabienne Gauffre
Abstract
Herein, we achieved spontaneous emulsification of organometallic precursors to elaborate subμm metal nanocapsules after interfacial reduction. Depending on the proportion of the three components, water, solvent, and the metal precursor, either thermodynamically stable “surfactant-free microemulsions” (SFME) or metastable Ouzo emulsions are formed. We investigated the catalytic transition metals Au, Pd, and Pt, individually or combined, and stabilized by various ligands. Upon reduction of the precursors, either shells of discrete nanoparticles (NPs) or continuous shells were obtained, for the SFME and Ouzo emulsions, respectively. The Au/Pd mixed emulsions lead to a unique structural morphology, in which the Au–Pd nanoparticles are embedded in a continuous submicronic metal shell. The AuNPs are available to grow larger particles within the NP shell using a seeded growth approach. The water-stable and surfactant-free nanocapsules are appealing as catalysts, and, as such, were evaluated for the hydrolysis of ammonia-borane as a promising catalytic strategy for H2 release from an H-high-content storage material. This work establishes for the first time a genuine activity of water-compatible gold colloids for this reaction.
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