Facile Synthesis of Three-Dimensional Pt-TiO2 Nano-networks: A Highly Active Catalyst for the Hydrolytic Dehydrogenation of Ammonia-Borane

Three‐dimensional (3D) porous metal and metal oxide nanostructures have received considerable interest because organization of inorganic materials into 3D nanomaterials holds extraordinary properties such as low density, high porosity, and high surface area. Supramolecular self‐assembled peptide nan...

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Bibliographic Details
Published in:Angewandte Chemie (International ed.) 2016-09, Vol.55 (40), p.12257-12261
Main Authors: Khalily, Mohammad Aref, Eren, Hamit, Akbayrak, Serdar, Susapto, Hepi Hari, Biyikli, Necmi, Özkar, Saim, Guler, Mustafa O.
Format: Article
Language:English
Subjects:
3D nanomaterials
Ammonia
ammonia-borane
atomic layer deposition
Atomic layer epitaxy
Catalysts
Catalytic activity
Chemical synthesis
Coating
Decoration
Dehydrogenation
Density
Deposition
Equivalence
Fabrication
hydrogen generation
Hydrolysis
Inorganic materials
Metals
Nanomaterials
Nanoparticles
Nanotechnology
Networks
Ozone
peptide aerogels
Peptides
Platinum
Porosity
Surface area
Titanium dioxide
Titanium oxides
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Summary:Three‐dimensional (3D) porous metal and metal oxide nanostructures have received considerable interest because organization of inorganic materials into 3D nanomaterials holds extraordinary properties such as low density, high porosity, and high surface area. Supramolecular self‐assembled peptide nanostructures were exploited as an organic template for catalytic 3D Pt‐TiO2 nano‐network fabrication. A 3D peptide nanofiber aerogel was conformally coated with TiO2 by atomic layer deposition (ALD) with angstrom‐level thickness precision. The 3D peptide‐TiO2 nano‐network was further decorated with highly monodisperse Pt nanoparticles by using ozone‐assisted ALD. The 3D TiO2 nano‐network decorated with Pt nanoparticles shows superior catalytic activity in hydrolysis of ammonia–borane, generating three equivalents of H2. A 3D peptide nanofiber aerogel was coated with TiO2 by atomic layer deposition (ALD) with angstrom‐level thickness precision. This nano‐network was further decorated with Pt nanoparticles (Pt NPs; see picture; red) using ozone‐assisted ALD. The 3D Pt‐TiO2 nano‐network shows superior catalytic activity in hydrolysis of ammonia–borane, generating 3 equivalents of H2.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201605577