Heterogeneous kinetic studies of the hydrogen peroxide decomposition with some transition metal-heterocyclic complexes

S. A. El-Safty, M. Y. El-Sheikh, M. A. Salem, A. B. Zaki

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The heterocyclic compounds piperidine (Pip), piperazine (Pz), morpholine (Morph), and N-methyl piperazine (N-MPz) were used as ligands to form transition metal complexes with Ni(II), Cu(II), and Co(II) ions. These complexes were supported on Dowex-50W resin so as to form new potential active catalysts for H2O2 decomposition in an aqueous medium. In all cases the reaction showed a first-order kinetics with respect to H2O2 concentration, except with Co(II) complexes, the reaction showed a second-order kinetics with 2% divinyl benzen (DVB) (50-100 mesh and 200-400 mesh). The rate constant k (per gram dry resin) was evaluated with a resin of cross-linkage 2 and 8% DVB (50-100 mesh) and 2% DVB (200-400 mesh) over temperature range 25-40°C. With a given resin cross-linkage, the rate constant has the following order: Ni(II) complexes < Co(II) complexes < Cu(II) complexes. With Pz ligand, k increased in the following sequence: Ni(II) complexes < Cu(II) complexes < Co(II) complexes. The reaction mechanisms of the first- and second-order kinetics were discussed and the activation parameters were deduced.

Original languageEnglish
Pages (from-to)617-624
Number of pages8
JournalInternational Journal of Chemical Kinetics
Volume33
Issue number10
DOIs
Publication statusPublished - 2001 Oct
Externally publishedYes

Fingerprint

Coordination Complexes
Metal complexes
hydrogen peroxide
Hydrogen peroxide
resins
Hydrogen Peroxide
Transition metals
mesh
Resins
transition metals
Decomposition
decomposition
Kinetics
kinetics
linkages
Ligands
Heterocyclic Compounds
Rate constants
heterocyclic compounds
ligands

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Catalysis

Cite this

Heterogeneous kinetic studies of the hydrogen peroxide decomposition with some transition metal-heterocyclic complexes. / El-Safty, S. A.; El-Sheikh, M. Y.; Salem, M. A.; Zaki, A. B.

In: International Journal of Chemical Kinetics, Vol. 33, No. 10, 10.2001, p. 617-624.

Research output: Contribution to journalArticle

El-Safty, S. A. ; El-Sheikh, M. Y. ; Salem, M. A. ; Zaki, A. B. / Heterogeneous kinetic studies of the hydrogen peroxide decomposition with some transition metal-heterocyclic complexes. In: International Journal of Chemical Kinetics. 2001 ; Vol. 33, No. 10. pp. 617-624.
@article{32c76a03257644ceaab0e69269a845cf,
title = "Heterogeneous kinetic studies of the hydrogen peroxide decomposition with some transition metal-heterocyclic complexes",
abstract = "The heterocyclic compounds piperidine (Pip), piperazine (Pz), morpholine (Morph), and N-methyl piperazine (N-MPz) were used as ligands to form transition metal complexes with Ni(II), Cu(II), and Co(II) ions. These complexes were supported on Dowex-50W resin so as to form new potential active catalysts for H2O2 decomposition in an aqueous medium. In all cases the reaction showed a first-order kinetics with respect to H2O2 concentration, except with Co(II) complexes, the reaction showed a second-order kinetics with 2{\%} divinyl benzen (DVB) (50-100 mesh and 200-400 mesh). The rate constant k (per gram dry resin) was evaluated with a resin of cross-linkage 2 and 8{\%} DVB (50-100 mesh) and 2{\%} DVB (200-400 mesh) over temperature range 25-40°C. With a given resin cross-linkage, the rate constant has the following order: Ni(II) complexes < Co(II) complexes < Cu(II) complexes. With Pz ligand, k increased in the following sequence: Ni(II) complexes < Cu(II) complexes < Co(II) complexes. The reaction mechanisms of the first- and second-order kinetics were discussed and the activation parameters were deduced.",
author = "El-Safty, {S. A.} and El-Sheikh, {M. Y.} and Salem, {M. A.} and Zaki, {A. B.}",
year = "2001",
month = "10",
doi = "10.1002/kin.1059",
language = "English",
volume = "33",
pages = "617--624",
journal = "International Journal of Chemical Kinetics",
issn = "0538-8066",
publisher = "John Wiley and Sons Inc.",
number = "10",

}

TY - JOUR

T1 - Heterogeneous kinetic studies of the hydrogen peroxide decomposition with some transition metal-heterocyclic complexes

AU - El-Safty, S. A.

AU - El-Sheikh, M. Y.

AU - Salem, M. A.

AU - Zaki, A. B.

PY - 2001/10

Y1 - 2001/10

N2 - The heterocyclic compounds piperidine (Pip), piperazine (Pz), morpholine (Morph), and N-methyl piperazine (N-MPz) were used as ligands to form transition metal complexes with Ni(II), Cu(II), and Co(II) ions. These complexes were supported on Dowex-50W resin so as to form new potential active catalysts for H2O2 decomposition in an aqueous medium. In all cases the reaction showed a first-order kinetics with respect to H2O2 concentration, except with Co(II) complexes, the reaction showed a second-order kinetics with 2% divinyl benzen (DVB) (50-100 mesh and 200-400 mesh). The rate constant k (per gram dry resin) was evaluated with a resin of cross-linkage 2 and 8% DVB (50-100 mesh) and 2% DVB (200-400 mesh) over temperature range 25-40°C. With a given resin cross-linkage, the rate constant has the following order: Ni(II) complexes < Co(II) complexes < Cu(II) complexes. With Pz ligand, k increased in the following sequence: Ni(II) complexes < Cu(II) complexes < Co(II) complexes. The reaction mechanisms of the first- and second-order kinetics were discussed and the activation parameters were deduced.

AB - The heterocyclic compounds piperidine (Pip), piperazine (Pz), morpholine (Morph), and N-methyl piperazine (N-MPz) were used as ligands to form transition metal complexes with Ni(II), Cu(II), and Co(II) ions. These complexes were supported on Dowex-50W resin so as to form new potential active catalysts for H2O2 decomposition in an aqueous medium. In all cases the reaction showed a first-order kinetics with respect to H2O2 concentration, except with Co(II) complexes, the reaction showed a second-order kinetics with 2% divinyl benzen (DVB) (50-100 mesh and 200-400 mesh). The rate constant k (per gram dry resin) was evaluated with a resin of cross-linkage 2 and 8% DVB (50-100 mesh) and 2% DVB (200-400 mesh) over temperature range 25-40°C. With a given resin cross-linkage, the rate constant has the following order: Ni(II) complexes < Co(II) complexes < Cu(II) complexes. With Pz ligand, k increased in the following sequence: Ni(II) complexes < Cu(II) complexes < Co(II) complexes. The reaction mechanisms of the first- and second-order kinetics were discussed and the activation parameters were deduced.

UR - http://www.scopus.com/inward/record.url?scp=0035474209&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035474209&partnerID=8YFLogxK

U2 - 10.1002/kin.1059

DO - 10.1002/kin.1059

M3 - Article

AN - SCOPUS:0035474209

VL - 33

SP - 617

EP - 624

JO - International Journal of Chemical Kinetics

JF - International Journal of Chemical Kinetics

SN - 0538-8066

IS - 10

ER -