Ruthenium(0) nanoparticles supported on xonotlite nanowire: a long-lived catalyst for hydrolytic dehydrogenation of ammonia-borane

Date

2014-01-01

Author

Akbayrak, Serdar
Özkar, Saim

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

137
views

0
downloads

Ruthenium(0) nanoparticles supported on xonotlite nanowire (Ru(0)@X-NW) were prepared by the ion exchange of Ru3+ ions with Ca2+ ions in the lattice of xonotlite nanowire followed by their reduction with sodium borohydride in aqueous solution at room temperature. Ru(0)@X-NW were characterized by a combination of advanced analytical techniques. The results show that (i) highly dispersed ruthenium(0) nanoparticles of 4.4 +/- 0.4 nm size were formed on the surface of xonotlite nanowire, (ii) Ru(0)@X-NW show high catalytic activity in hydrogen generation from the hydrolytic dehydrogenation of ammonia borane with a turnover frequency value up to 135 min(-1) at 25.0 +/- 0.1 degrees C. (iii) They provide unprecedented catalytic life time (TTO = 134,100) for hydrogen generation from the hydrolysis of ammonia borane at 25.0 +/- 0.1 degrees C. (iv) The results of a kinetic study on the hydrogen generation from the hydrolysis of ammonia borane were also reported including the activation energy of 77 +/- 2 kJ mol(-1) for this reaction.

Subject Keywords

Inorganic Chemistry

URI

https://hdl.handle.net/11511/39569

Journal

DALTON TRANSACTIONS

DOI

https://doi.org/10.1039/c3dt52701h

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

Ruthenium(III) acetylacetonate; a homogeneous catalyst in the hydrolysis of sodium borohydride Keçeli, Ezgi; Özkar, Saim; Department of Chemistry (2006) Ruthenium(III) acetylacetonate was employed for the first time as homogeneous catalyst in the hydrolysis of sodium borohydride. Ruthenium(III) acetylacetonate was not reduced by sodium borohydride under the experimental conditions and remains unchanged after the catalysis, as shown by FT-IR and UV-Vis spectroscopic characterization. Poisoning experiments with mercury, carbon disulfide or trimethylphosphite provide compelling evidence that ruthenium(III) acetylacetonate is indeed a homogenous catalyst in the...
Ruthenium(0) nanoparticles supported on bare or silica coated ferrite as highly active, magnetically isolable and reusable catalyst for hydrogen generation from the hydrolysis of ammonia borane Sarıca, Esra; Özkar, Saim; Department of Chemistry (2019) Ruthenium(0) nanoparticles supported on bare or silica-coated magnetite are prepared by impregnation of ruthenium(Ш) ions on the surface of support followed by their reduction with aqueous solution of sodium borohydride. The materials are magnetically isolated from the reaction solution and characterized by a combination of advanced analytical techniques including ICP-OES, BET, XRD, SEM-EDS, TEM, XPS. These magnetically isolable nanoparticles are used as catalyst in hydrogen generation from the hydrolysis o...
Osmium(0) nanoclusters stabilized by zeolite framework; highly active catalyst in the aerobic oxidation of alcohols under mild conditions Zahmakiran, Mehmet; Akbayrak, Serdar; Kodaira, Tetsuya; Özkar, Saim (Royal Society of Chemistry (RSC), 2010-08-01) Osmium(0) nanoclusters stabilized by zeolite-Y framework were reproducibly prepared by a simple two step procedure involving the incorporation of osmium(III) canons into the zeolite matrix by ion-exchange, followed by their reduction within the cavities of zeolite with sodium borohydride in aqueous solution all at room temperature. The composition and morphology of osmium(0) nanoclusters stabilized by zeolite framework, as well as the integrity and crystallinity of the host material were investigated by usi...
Friedel-Crafts alkylation of ferrocene with Z-cyclooctene and cyclohexene Grevels, Friedrich-Wilhelm; KURAN, Ayla; Özkar, Saim; Zora, Metin (Elsevier BV, 1999-09-15) Cycloalkylated ferrocene derivatives, potentially useful as liquid burning rate modifiers for the HTPB/AP-based composite rocket propellants, were synthesized by the Friedel-Crafts alkylation of ferrocene with Z-cyclooctene or cyclohexene in the presence of AlCl3 as a Lewis acid catalyst. The reaction with Z-cyclooctene yields a mixture of main products containing up to four C8H15 substituents, each of which exists in several isomeric forms, as recognized by MS and GC-MS techniques. Two isomeric monosubstit...
Synthesis and characterization of ruthenium(0) metal nanoparticles as catalyst in the hydrolysis of sodium borohydride Zahmakıran, Mehmet; Özkar, Saim; Department of Chemistry (2005) Sodium borohydride is stable in alkaline solution, however, it hydrolyses and generates hydrogen gas in the presence of suitable catalyst. By this way hydrogen can be generated safely for the fuel cells. All of the catalyst having been used in the hydrolysis of sodium borohydride, with one exception, are heterogeneous. The limited surface area of the heterogeneous and therefore, have limited activity because of the surface area. Thus, the use of metal nanoclusters as catalyst with large surface area is expe...

Citation Formats

S. Akbayrak and S. Özkar, “Ruthenium(0) nanoparticles supported on xonotlite nanowire: a long-lived catalyst for hydrolytic dehydrogenation of ammonia-borane,” DALTON TRANSACTIONS, pp. 1797–1805, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39569.