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

Date

2017-07-05

Author

Manna, Joydev
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

210
views

0
downloads

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 polydopamine (PDA) coated cobalt ferrite as support instead of bare cobalt ferrite. PDA coating of CoFe2O4 nanopowders was achieved by pH-induced self-polymerization of dopamine hydrochloride at room temperature and the thickness of PDA was optimized by changing the amount of dopamine hydrochloride. Palladium(0) nanoparticles supported on PDA coated cobalt ferrite (Pd degrees/PDA-CoFe2O4) were prepared by two step impregnation-reduction process and characterized by a combination of advanced analytical techniques. The results reveal that palladium nanoparticles with an average size of 1.4 +/- 0.3 nm are well dispersed on polydopamine layer with a thickness of 8.6 +/- 1.0 nm on the surface of cobalt ferrite nanopowders. Pd degrees/PDA-CoFe2O4 with a palladium loading of 1.08 wt% was found to be a highly active and reusable catalyst in hydrogen generation from the hydrolysis of ammonia borane with a turnover frequency of 175 min(-1) at 25.0 +/- 0.1 degrees C. Magnetically isolable Pd degrees/PDA-CoFe2O4 catalyst preserves its initial catalytic activity even after the tenth use providing the release of 3 equivalent H-2 per mole of ammonia borane.

Subject Keywords

Process Chemistry and Technology, General Environmental Science, Catalysis

URI

https://hdl.handle.net/11511/43229

Journal

APPLIED CATALYSIS B-ENVIRONMENTAL

DOI

https://doi.org/10.1016/j.apcatb.2017.02.037

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

Palladium(0) nanoparticles supported on silica-coated cobalt ferrite: A highly active, magnetically isolable and reusable catalyst for hydrolytic dehydrogenation of ammonia borane Akbayrak, Serdar; KAYA, MURAT; Volkan, Mürvet; Özkar, Saim (Elsevier BV, 2014-04-05) Palladium(0) nanoparticles supported on silica-coated cobalt ferrite (Pd(0)/SiO2-CoFe2O4) were in situ generated during the hydrolysis of ammonia borane, isolated from the reaction solution by using a permanent magnet and characterized by ICP-OES, XRD, TEM, TEM-EDX, XPS and the N-2 adsorption-desorption techniques. All the results reveal that well dispersed palladium(0) nanoparticles were successfully supported on silica coated cobalt ferrite and the resulting Pd(0)/SiO2-CoFe2O4 are highly active, magnetica...
Rhodium(0) nanoparticles supported on nanosilica: Highly active and long lived catalyst in hydrogen generation from the methanolysis of ammonia borane Ozhava, Derya; Özkar, Saim (Elsevier BV, 2016-02-01) Nanosilica stabilized rhodium(0) nanoparticles (Rh(0)/nanoSiO(2)), in situ formed from the reduction of rhodium(II) octanoate impregnated on the surface of nanosilica, are active catalyst in hydrogen generation from the methanolysis of ammonia borane at room temperature. Monitoring the hydrogen evolution enables us to follow the kinetics of nanoparticles formation. The resulting sigmoidal kinetic curves are analyzed by using the 2-step mechanism of the slow, continuous nucleation and autocatalytic surface g...
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...
Highly active, robust and reusable micro-/mesoporous TiN/Si3N4 nanocomposite-based catalysts for clean energy: Understanding the key role of TiN nanoclusters and amorphous Si3N4 matrix in the performance of the catalyst system Lale, Abhijeet; Mallmann, Maira Debarba; Tada, Shotaro; Bruma, Alina; Özkar, Saim; Kumar, Ravi; Haneda, Masaaki; Machado, Ricardo Antonio Francisco; Iwamoto, Yuji; Demirci, Umit B.; Bernard, Samuel (Elsevier BV, 2020-09-05) Herein, we developed a precursor approach toward the design of a titanium nitride (TiN)/silicon nitride (Si3N4) nanocomposite with an activated carbon monolith as a support matrix forming a highly micro-/mesoporous component to be used as a Pt support for the catalytic hydrolysis of sodium borohydride (NaBH4) as a model reaction. The experimental data demonstrated that the amorphous Si3N4 matrix, the strong Pt-TiN nanocluster interaction and the synergistic effects between the three components contributed t...
Nanoceria supported palladium(0) nanoparticles: Superb catalyst in dehydrogenation of formic acid at room temperature Akbayrak, Serdar; TONBUL, YALÇIN; Özkar, Saim (Elsevier BV, 2017-06-05) Highly efficient dehydrogenation of formic acid (FA) at room temperature was achieved using palladium(0) nanoparticles supported on nanoceria (Pd-0/CeO2) as catalysts. Pd-0/CeO2 was prepared by 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 was isolated from the reaction solution by centrifugation and characterized by a combination of advanced analytical techniques. The catalytic activity of ...

Citation Formats

J. Manna, S. Akbayrak, and S. Özkar, “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,” APPLIED CATALYSIS B-ENVIRONMENTAL, pp. 104–115, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/43229.