Water-soluble poly(4-styrenesulfonic acid-co-maleic acid) stabilized ruthenium(0) and palladium(0) nanoclusters as highly active catalysts in hydrogen generation from the hydrolysis of ammonia-borane

2009-08-01
Metin, Oender
ŞAHİN ÜN, ŞULE
Özkar, Saim
Show full item record
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
113
views
0
downloads
Water-soluble poly(4-styrenesulfonic acid-co-maleic acid), PSSA-co-MA, stabilized ruthenium(0) and palladium(0) nanoclusters were for the first time prepared in situ from the reduction of ruthenium(III) chloride and potassium tetrachloropalladate(II), respectively, by ammonia-borane during its hydrolysis at room temperature. PSSA-co-MA stabilized ruthenium(0) and palladium(0) nanoclusters having average particle size of 1.9 +/- 0.5 and 3.5 +/- 1.6 nm, respectively, were isolated from the reaction solution and characterized by TEM and UV-visible electronic absorption spectroscopy. PSSA-co-MA stabilized ruthenium(0) and palladium(0) nanoclusters are highly active catalysts for hydrogen generation from the hydrolysis of ammonia-borane at low temperature. PSSA-co-MA stabilized ruthenium(0) and palladium(0) nanoclusters provide 51,720 and 8720 turnovers, respectively, in the hydrogen generation from the hydrolysis of ammonia-borane at 25 degrees C before deactivation. Catalytic hydrolysis of ammonia-borane is first order with respect to the catalyst concentration, but zero order with respect to the substrate concentration in the case of both ruthenium(0) and palladium(0) nanoclusters. Activation energies for the hydrolysis of ammonia-borane in the presence of PSSA-co-MA stabilized ruthenium(0) or palladium(0) nanoclusters (54 +/- 2 kJ mol(-1) and 44 +/- 2 kJ mol(-1), respectively) are smaller than most of the values reported for the same reaction in the presence of other catalyst systems. (C) 2009 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
Polymer stabilizer, Ruthenium, Palladium, Nanoclusters, Catalyst, Water-soluble, Hydrolysis, Ammonia-borane
https://hdl.handle.net/11511/62851
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Department of Chemistry, Article

Suggestions

Water-soluble poly(4-styrenesulfonic acid-co-maleic acid (-stabilized nickel(0) and cobalt(0) nanoclusters as highly active catalysts in hydrogen generation from the hydrolysis of ammonia-borane
Metin, Önder; Özkar, Saim (2010-09-03)
Water soluble poly(4-styrenesulfonic acid-co-maleic acid), PSSA-co-MA, stabilized nickel(O) and cobalt(O) nanoclusters were prepared for the first time from the reduction of nickel(II) chloride and cobalt(II) chloride by using minimum amount of sodium borohydride shortly before their usage as catalysts in the hydrolysis of ammonia-borane (AB) in the same medium at room temperature. PSSA-co-MA stabilized nickel(0) and cobalt(0) nanoclusters showed high catalytic activity in hydrogen generation from the hydro...
Water soluble polymer stabilized iron(0) nanoclusters: A cost-effective and magnetically recoverable catalyst in hydrogen generation from the hydrolysis of sodium borohydride and ammonia borane
Dinç, Melek; Metin, Önder; Özkar, Saim (Elsevier BV, 2012-3)
Water soluble polymer stabilized iron(0) nanoclusters were prepared from the reduction of iron(III) chloride by sodium borohydride (SB) and ammonia borane (AB) mixture in the presence of polyethylene glycol (PEG) as stabilizer and ethylene glycol as solvent at 80 degrees C under nitrogen atmosphere. PEG stabilized iron(0) nanoclusters were isolated from the reaction solution by centrifugation and characterized by UV-Vis, TEM, HRTEM, XRD, ICP-OES and FT-IR methods. The particle size of PEG stabilized iron(0)...
Water soluble laurate-stabilized ruthenium(0) nanoclusters catalyst for hydrogen generation from the hydrolysis of ammonia-borane: High activity and long lifetime
DURAP, FEYYAZ; Zahmakiran, Mehmet; Özkar, Saim (2009-09-01)
The simplest amine-borane, considered as solid hydrogen storage material, ammonia-borane (H(3)NBH(3)) can release hydrogen gas upon catalytic hydrolysis under mild conditions. Herein, we report the preparation of a novel catalyst, water dispersible laurate-stabilized ruthenium(0) nanoclusters from the dimethylamine-borane reduction of ruthenium(III) chloride in sodium laurate solution at room temperature. The ruthenium nanoclusters in average size of 2.6 +/- 1.2 nm were isolated from the solution and well c...
Hydrogen generation from the methanolysis of ammonia borane catalyzed by in situ generated, polymer stabilized ruthenium(0) nanoclusters
Erdogan, Huriye; Metin, Onder; Özkar, Saim (2011-07-19)
Addressed herein is the detailed study on in situ generation of poly(N-vinyl-2-pyrrolidone) (PVP) stabilized ruthenium(0) nanoclusters and their catalysis in the methanolysis of ammonia borane (AB). PVP-stabilized ruthenium(0) nanoclusters with an average particle size of 2.4 +/- 1.2 nm were generated in situ from the reduction of ruthenium(III) chloride during the methanolysis of AB in the presence of PVP at room temperature. The nanoclusters were characterized by UV-vis spectroscopy, TEM, XRD, XPS and FTI...
Palladium(0) nanoparticles supported on polydopamine coated Fe3O4 as magnetically isolable, highly active and reusable catalysts for hydrolytic dehydrogenation of ammonia borane
Manna, Joydev; Akbayrak, Serdar; Özkar, Saim (2016-01-01)
Magnetic ferrite nanopowders were coated with polydopamine which is inert against the hydrolysis of ammonia borane. Coating of ferrite powders was achieved by pH-induced self-polymerization of dopamine hydrochloride at room temperature. Palladium(0) nanoparticles supported on polydopamine coated ferrite (Pd-0/PDA-Fe3O4) were prepared by impregnation of palladium(II) ions on the surface of PDA-Fe3O4 followed by their reduction with sodium borohydride in aqueous solution at room temperature. Magnetically isol...
Citation Formats
O. Metin, Ş. ŞAHİN ÜN, and S. Özkar, “Water-soluble poly(4-styrenesulfonic acid-co-maleic acid) stabilized ruthenium(0) and palladium(0) nanoclusters as highly active catalysts in hydrogen generation from the hydrolysis of ammonia-borane,” INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, pp. 6304–6313, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/62851.
METU IIS - Integrated Information Service open@metu.edu.tr