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
Palladium(0) nanoparticles supported on ceria: Highly active and reusable catalyst in hydrogen generation from the hydrolysis of ammonia borane
Date
2016-07-13
Author
Tonbul, Yalcin
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
203
views
0
downloads
Cite This
Palladium(0) nanoparticles supported on nanoceria (Pd-0/CeO2) were prepared by the impregnation of palladium(II) ions on the surface of ceria followed by their reduction with sodium borohydride in aqueous solution at room temperature. Pd-0/CeO2 were isolated from the reaction solution by centrifugation and characterized by ICP-OES, XRD, TEM, SEM-EDS and XPS techniques. All the results reveal that palladium(0) nanoparticles were uniformly dispersed on ceria and the resulting Pd-0/CeO2 are highly active and reusable catalysts in hydrogen generation from the hydrolysis of ammonia borane with a turnover frequency value of 29 min(-1) at 25.0 +/- 0.1 degrees C. The catalytic activity of Pd-0/CeO2 in hydrogen generation from the hydrolysis of ammonia borane is higher compared to that of other palladium based catalysts such as Pd-0/ZrO2, Pd-0/SiO2, Pd-0/Al2O3, Pd-0/TiO2 under the same conditions. The catalytic activity of Pd-0/CeO2 samples with various palladium loading in the range of 1.0-5.0% wt Pd was tested in hydrogen generation from the hydrolysis of ammonia borane at 25.0 +/- 0.1 degrees C. The highest catalytic activity was achieved by using 1.18% wt palladium loaded ceria. The reusability tests reveal that Pd-0/CeO2 are still active in the subsequent runs of hydrolysis of ammonia borane preserving 47% of the initial catalytic activity even after the fifth run of hydrolysis. Our report also includes the results of kinetic study of the catalytic hydrolysis of ammonia borane depending on the temperature and catalyst concentration. (c) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Subject Keywords
Palladium Nanoparticles
,
Ceria
,
Ammonia Borane
,
Hydrogen Generation
,
Hydrolysis
,
Catalysis
URI
https://hdl.handle.net/11511/36467
Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
DOI
https://doi.org/10.1016/j.ijhydene.2016.04.058
Collections
Department of Chemistry, Article
Suggestions
OpenMETU
Core
Ruthenium(0) nanoparticles supported on nanohafnia: A highly active and long-lived catalyst in hydrolytic dehydrogenation of ammonia borane
Kalkan, Elif Betul; Akbayrak, Serdar; Özkar, Saim (2017-04-01)
Ruthenium(0) nanoparticles supported on nanohafnia (Ru-0/HfO2) were prepared by impregnation of ruthenium(III) cations on the surface of hafnia followed by their reduction with sodium borohydride at room temperature. Ru-0/HfO2 samples were isolated from the reaction solution by centrifugation and characterized by a combination of advanced analytical techniques including ICP-OES, BET, XRD, SEM-EDS, TEM, XPS. The catalytic activity of Ru-0/HfO2 samples with various ruthenium loading in the range 0.5-5.0% wt R...
Zeolite confined palladium(0) nanoclusters as effective and reusable catalyst for hydrogen generation from the hydrolysis of ammonia-borane
Rakap, Murat; Özkar, Saim (2010-02-01)
Zeolite confined palladium(0) nanoclusters were prepared by a two step procedure: incorporation of Pd2+ ions into the zeolite-Y by ion-exchange followed by the reduction of Pd2+ ions in the supercages of zeolite-Y with sodium borohydride at room temperature. Zeolite confined palladium(0) nanoclusters are stable enough to be isolated as solid materials and characterized by ICP-OES, XRD, HRTEM, SEM, X-ray photoelectron spectroscopy and N-2 adsorption technique. These nanoclusters are isolable, redispersible a...
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...
Palladium(0) nanoclusters stabilized by poly(4-styrenesulfonic acid-co-maleic acid) as an effective catalyst for Suzuki-Miyaura cross-coupling reactions in water
Metin, Onder; DURAP, FEYYAZ; AYDEMİR, MURAT; Özkar, Saim (Elsevier BV, 2011-03-01)
Palladium(0) nanoclusters stabilized by poly(4-styrenesulfonic acid-co-maleic acid), PSSA-co-MA, were generated in situ during the hydrolysis of ammonia-borane (AB) from the reduction of potassium tetrachloropalladate(II) in aqueous solution at room temperature. They were isolated from the reaction solution and characterized by UV-visible electronic absorption spectroscopy, TEM, SAED and XRD techniques. The PSSA-co-MA stabilized palladium(0) nanoclusters were used as catalyst in Suzuki-Miyaura cross-couplin...
Nanoalumina-supported rhodium(0) nanoparticles as catalyst in hydrogen generation from the methanolysis of ammonia borane
Ozhava, Derya; Özkar, Saim (2017-10-01)
Rhodium(0) nanoparticles were in situ formed from the reduction of rhodium(II) octanoate and supported on the surface of nanoalumina yielding Rh(0)/nanoAl(2)O(3) which is highly active catalyst in hydrogen generation from the methanolysis of ammonia borane at room temperature. The kinetics of nanoparticle formation can be followed just by monitoring the volume of hydrogen gas evolved from the methanolysis of ammonia borane. The evaluation of the kinetic data gives valuable insights to the slow, continuous n...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
Y. Tonbul, S. Akbayrak, and S. Özkar, “Palladium(0) nanoparticles supported on ceria: Highly active and reusable catalyst in hydrogen generation from the hydrolysis of ammonia borane,”
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
, pp. 11154–11162, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/36467.