Electrochemical catalysis and stability of tetraamido macrocyclic ligands iron immobilized on modified pyrolytic graphite electrode

Wang, Jinghua, Sun, Hong and Zhao, X. S. (2010) Electrochemical catalysis and stability of tetraamido macrocyclic ligands iron immobilized on modified pyrolytic graphite electrode. Catalysis Today, 158 3-4: 263-268. doi:10.1016/j.cattod.2010.03.046


Author Wang, Jinghua
Sun, Hong
Zhao, X. S.
Title Electrochemical catalysis and stability of tetraamido macrocyclic ligands iron immobilized on modified pyrolytic graphite electrode
Journal name Catalysis Today   Check publisher's open access policy
ISSN 0920-5861
1873-4308
Publication date 2010-12-22
Sub-type Article (original research)
DOI 10.1016/j.cattod.2010.03.046
Volume 158
Issue 3-4
Start page 263
End page 268
Total pages 6
Editor Zi-Feng Yan
Zheng-Ping Hao
G.Q.(Max) Lu
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Formatted abstract
A synthetic molecule tetraamido macrocyclic ligands iron complex (FeIII-TAML), a catalyst that speeds up peroxide oxidation reaction, was immobilized on pyrolytic graphite (PG) electrode modified with sodium alginate (SA) gel films. The tetraamido macrocyclic ligands iron complex in the sodium alginate thin films was characterized by cyclic voltammetry (CV), ultraviolet–visible spectrophotometry (UV–vis) and scanning electron microscopy (SEM). The characterization results showed that the tetraamido macrocyclic ligands iron complex on pyrolytic graphite electrode retained its native structure and displayed a pair of well-defined and nearly reversible peaks at about −0.051 V and 0.051 V (V vs saturated calomel electrode, SCE) in a 0.1 M phosphate buffer solution of pH 7.0, originated from the tetraamido macrocyclic ligands iron complex redox couples. The iron complex in the sodium alginate films also exhibited a good electrocatalytic property toward the decomposition of hydrogen peroxide with a significant lowering of overpotential, indicating the electrode can be potential hydrogen peroxide sensors. The amperometric response of the sensor which showed good stability and reliability varied linearly with the hydrogen peroxide concentrations ranging from 2.2 mM to 24 mM, with a detection limit of 0.88 mM at a signal-to-noise ratio of 3.
Keyword Tetraamido macrocyclic ligands iron
Sodium alginate
Electrochemistry
Electrocatalysis
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Issue title: Perspective on catalysis for sustainable energy and environmental technologies

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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