Synthesis and characterization of poly(N-vinyl-2-pyrrolidone)-stabilized water-soluble nickel(0) nanoclusters as catalyst for hydrogen generation from the hydrolysis of sodium borohydride

2008-11-12
Metin, Onder
Özkar, Saim
Show full item record
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
114
views
0
downloads
Water-soluble PVP-stabilized nickel(0) nanclusters in particle size of 3.6 +/- 1.6 nm were synthesized by using a modified version Of alcohol reduction method and characterized by TEM, XPS and FT-IR. PVP polymer is coordinated to the nanoclusters surface through some of the carbonyl groups as concluded from a comparative FT-IR spectral study. The PVP-stabilized nickel(0) nanoclusters are very stable in solution and yet highly active catalyst providing 8700 turnovers of hydrogen gas generation from the hydrolysis of sodium borohydride over 27 h before deactivation, They can be isolated as stable solid material, which are redispersible in water and show still the same catalytic activity after redispersion. A kinetic Study shows that the catalytic hydrolysis of sodium borohydride is first order with respect to nickel concentration and zero order with respect to substrate concentration. The activation energy of the hydrolysis of sodium borohydride catalyzed by PVP-stabilized nickel(0) nanoclusters was determined to be E(lambda) = 48 +/- 2 kJ mol(-1).
Sodium borohydride, Hydrolysis, Water soluble, Polymer, PVP, Catalyst, Catalyst;oclusters, Nickel, Nanoclusters
https://hdl.handle.net/11511/62403
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
Department of Chemistry, Article

Suggestions

Synthesis and characterization of Ba/MCM-41
Kaya, Emine; Oktar, Nuray; Karakaş, Gürkan; Murtezaoglu, Kirali (2010-01-01)
Mesoporous Ba/MCM-41 type materials (Ba/MCM-41) with high Ba/Si molar ratios between 0.025 and 0.1 were synthesized by direct hydrothermal synthesis. The samples were characterized by XRD, nitrogen adsorption, TGA-DTA, FTIR, SEM-EDS, and TEM techniques. BET surface areas of samples with various Ba loadings were found between 722 and 931 m(2)/g with 28 A average pore size, which is consistent with the pore size of 30 A for pure MCM-41 samples synthesized by the same procedure. The crystal structures of synth...
Synthesis of ferrocenyl quinones and ferrocenyl based burning rate catalysts
Açıkalın, Serdar; Zora, Metin; Department of Chemistry (2003)
Recently, considerable interest has been devoted to the synthesis of new ferrocene derivatives since properly functionalized ferrocene derivatives could be potential antitumor substances. For this purpose, we have investigated the synthesis of ferrocenyl quinones starting from squaric acid. Thermolysis of ferrocenylsubstituted cyclobutenones, which have been prepared from ferrocenyl cyclobutenediones and alkenyllithiums, affords hydroquinones, which furnish, upon oxidation, ferrocenyl quinones. Ferrocenyl c...
Synthesis of block conducting copolmers of cholesteryl functionalized thiophene and their use in the immobilization of cholesterol oxidase
Çırpan, Ali; Toppare, Levent Kamil; Department of Chemistry (2004)
Synthesis and characterization of conducting copolymers were achieved by using thiophene-3-yl acetic acid cholesteryl ester (CM) and poly (3-methylthienyl methacrylate) (PMTM). A new polythiophene containing a cholesteryl side chain in the b- position was chemically polymerized in nitromethane/carbon tetrachloride using FeCl3 as the oxidizing agent. Polymerization was also achieved by constant current electrolysis in dichloromethane. Subsequently, conducting copolymers of thiophene-3-yl acetic acid choleste...
Synthesis of n-(2-propylphenyl) substituted chiral amino alcohols and their usage in enantioselective diethylzinc addition reactions
Günler, Zeynep İnci; Tanyeli, Cihangir; Department of Chemistry (2011)
IChiral 1,2-amino alcohols were synthesized via newly developed “intramolecular unsaturation transfer” using cyclohexanone, propargyl bromide, and various chiral amino alcohols as starting components. These amino alcohols can be potential chiral ligands for many asymmetric transformation reactions. Therefore, their effectiveness as chiral ligands in diethylzinc addition to benzaldehyde and N-diphenylphosphinoyl imines were tested. Various parameters including temperature, solvent, ligand amount etc. were sc...
Synthesis and characterization of poly(dibromophenylene oxide)s through thermal decomposition of various transition metal complexes in solid state.
Şanlı, Pınar; Kısakürek, Duygu; Aras, Leyla; Department of Chemistry (2002)
In this study, synthesis and characterization of poly(dibromophenylene oxide)s though thermal decomposition of bis(2,4,6-tribromophenolato)di(N- methyl imidazole) Cu(II), bis(2,4,6-tribromophenolato)di(N-methyl illimidazole)Co(II) and bis(2,4,6-tribromophenolato)di(N-methyl imidazole)Ni(II) complexes in solid state was examined. For the characterization of complexes FTIR, DSC, mass spectroscopy, magnetic susceptibility and C, H,N elemental analysis were performed. Syntheses of the polymer were achieved by t...
Citation Formats
O. Metin and S. Özkar, “Synthesis and characterization of poly(N-vinyl-2-pyrrolidone)-stabilized water-soluble nickel(0) nanoclusters as catalyst for hydrogen generation from the hydrolysis of sodium borohydride,” JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, pp. 39–46, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/62403.
METU IIS - Integrated Information Service open@metu.edu.tr