Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Ruthenium(0) nanoclusters stabilized by zeolite framework as superb catalyst for the hydrogenation of neat benzene under mild conditions: Additional studies including cation site occupancy, catalytic activity, lifetime, reusability and poisoning
Date
2010-06-07
Author
Zahmakiran, Mehmet
Kodaira, Tetsuya
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
166
views
0
downloads
Cite This
The hydrogenation of arenes is an ubiquitous chemical transformation used in both the petrochemical and specialty industry and important for the generation of clean diesel fuels. In a recent communication (M. Zahmakiran, S. Ozkar, Langmuir 24 (2008) 7065) we have reported the preliminary results for the unprecedented catalytic activity of zeolite framework stabilized ruthenium(0) nanoclusters in the hydrogenation of neat benzene (TOF approximate to 1040 mol benzene/mol Ru.h) under mild conditions (22 degrees C, 40 +/- 1 psig H(2)). Here we report the work in full details. including (i) far-infrared spectroscopic investigation of ruthenium(III)-exchanged-zeolite and zeolite framework containing ruthenium(0) nanoclusters, which showed that ruthenium(0) nanoclusters formed inside the cavities of zeolite by retaining its framework intact, (ii) the collection of wealthy kinetic data to demonstrate the effect of ruthenium loading, temperature. and catalyst concentration on the catalytic activity of zeolite framework stabilized ruthenium(0) nanoclusters in the hydrogenation of neat benzene, (iii) probing the isolability, bottleability and reusability of zeolite framework stabilized ruthenium(0) nanoclusters; (iv) poisoning experiments performed by using tricyclohexylphosphine (P(C(6)H(11))(3)) and 4-ethyl-2,6,7-trioxa-1-phosphabicyclo[2.2.2]octane (P(OCH(2))(3)CCH(2)CH(3)) in order to answer the most classical question whether the ruthenium(0) nanoclusters exist on the surface or inside the cavities of the host material; (v) a summary section detailing the main findings for the "green chemistry".
Subject Keywords
Process Chemistry and Technology
,
General Environmental Science
,
Catalysis
URI
https://hdl.handle.net/11511/62732
Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
DOI
https://doi.org/10.1016/j.apcatb.2010.03.016
Collections
Department of Chemistry, Article
Suggestions
OpenMETU
Core
Ruthenium(0) Nanoclusters Stabilized by a Nanozeolite Framework: Isolable, Reusable, and Green Catalyst for the Hydrogenation of Neat Aromatics under Mild Conditions with the Unprecedented Catalytic Activity and Lifetime
Zahmakiran, Mehmet; Tonbul, Yalcin; Özkar, Saim (2010-05-12)
The hydrogenation of aromatics is a ubiquitous chemical transformation used in both the petrochemical and specialty industry and is important for the generation of clean diesel fuels. Reported herein is the discovery of a superior heterogeneous catalyst, superior in terms of catalytic activity, selectivity, and lifetime in the hydrogenation of aromatics in the solvent-free system under mild conditions (at 25 C and 42 +/- 1 psig initial H(2) pressure). Ruthenium(0) nanoclusters stabilized by a nanozeolite fr...
Iridium(O) nanoparticles dispersed in zeolite framework: A highly active and long-lived green nanocatalyst for-the hydrogenation of neat aromatics at room temperature
TONBUL, YALÇIN; Zahmakıran, Mehmet; Özkar, Saim (Elsevier BV, 2014-04-27)
The complete hydrogenation of aromatic molecules is one of the key transformation employed in the synthetic and petroleum chemistry. Described herein is a new catalytic nanomaterial for the hydrogenation of neat aromatics under mild conditions. A novel nanocatalyst, consisting of iridium(O) nanoparticles stabilized by zeolite with EAU framework could reproducibly been prepared from the reduction of iridium(III)-exchanged zeolite in an aqueous sodium borohydride solution at room temperature and characterized...
Palladium(0) nanoparticles supported on polydopamine coated CoFe2O4 as highly active, magnetically isolable and reusable catalyst for hydrogen generation from the hydrolysis of ammonia borane
Manna, Joydev; Akbayrak, Serdar; Özkar, Saim (Elsevier BV, 2017-07-05)
Palladium(0) nanoparticles supported on cobalt ferrite (Pd degrees/CoFe2O4) are found to be highly active catalyst, providing an unprecedented catalytic activity with a turnover frequency of 290 min(-1) in hydrogen generation from the hydrolysis of ammonia borane at room temperature. However, the initial catalytic activity of Pd degrees/CoFe2O4 catalyst is not preserved after the reuse of the catalyst in hydrolytic dehydrogenation of ammonia borane. The stability of the catalyst is improved by using the pol...
Aqueous-phase hydrodechlorination of trichloroethylene over Pd-based swellable organically-modified silica (SOMS): Catalyst deactivation due to chloride anions
Çelik, Gökhan; Gunduz, Seval; Miller, Jeffrey T.; Edmiston, Paul L.; Ozkan, Umit S. (Elsevier BV, 2018-12-30)
Swellable-organically modified silica (SOMS) has been demonstrated to be an efficient catalyst scaffold for catalytic treatment of water contaminated with trichloroethylene (TCE). In this study, deactivation characteristics of Pd-incorporated SOMS for aqueous-phase hydrodechlorination (HDC) of TCE were investigated. Pd/SOMS catalysts were exposed to highly-concentrated chloride solutions (up to 1 M NaCl or 0.01 M HCl) to examine the deactivation resistant behavior of Pd/SOMS. The commonly used HDC catalyst ...
Nanoceria supported rhodium(0) nanoparticles as catalyst for hydrogen generation from methanolysis of ammonia borane
Ozhava, Derya; Özkar, Saim (Elsevier BV, 2018-12-05)
This work reports the preparation and catalytic use of nanoceria supported rhodium(0) nanoparticles, Rh(0)/nanoCeO(2), as catalyst for hydrogen generation from the methanolysis of ammonia borane. Rh(0)/nanoCeO(2) was in situ formed from the reduction of rhodium(II) octanoate on the surface of nanoceria during the catalytic methanolysis of ammonia borane at room temperature. The results of analysis using PXRD, TEM, STEM-EDS, XPS, SEM, SEM-EDX, N-2 adsorption-desorption and ICP-OES reveal that rhodium(0) nano...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
M. Zahmakiran, T. Kodaira, and S. Özkar, “Ruthenium(0) nanoclusters stabilized by zeolite framework as superb catalyst for the hydrogenation of neat benzene under mild conditions: Additional studies including cation site occupancy, catalytic activity, lifetime, reusability and poisoning,”
APPLIED CATALYSIS B-ENVIRONMENTAL
, pp. 533–540, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/62732.