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The Effects of Asymmetry in Combination with Reduced Graphene Oxide Nanosheets on Hydrazine Electrocatalytic Detection on Cobalt Phthalocyanines
Author(s) -
Mpeta Lekhetho S.,
Sen Pinar,
Nyokong Tebello
Publication year - 2020
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.202060094
Subject(s) - electrocatalyst , chronoamperometry , cyclic voltammetry , graphene , hydrazine (antidepressant) , cobalt , catalysis , oxide , dielectric spectroscopy , inorganic chemistry , detection limit , chemistry , electrochemistry , reaction rate constant , materials science , organic chemistry , nanotechnology , electrode , kinetics , physics , chromatography , quantum mechanics
New symmetric {tetrakis [4‐(4‐(5‐chloro‐1H‐benzo[d]imidazol‐2‐yl) phenoxy phthalocyaninato] Co (II) ( CoTPc )} and low symmetry {tris tert butyl phenoxy mono [4‐(4‐(5‐chloro‐1H‐benzo[d]imidazol‐2‐yl) phenoxy phthalocyaninato]} Co (II) ( CoMPc ) were successfully synthesised and combined with reduced graphene oxide nanosheets ( rGONS ) for electrocatalytic detection of hydrazine. Prior to electrocatalysis, the probes were characterised using cyclic voltammetry and electrochemical impedance spectroscopy. Chronoamperometry was used to determine catalytic rate constant and the limit of detection (LOD). CoMPc‐rGONS gave catalytic rate constant and LOD of 1.37×10 6 M −1 s −1 and 0.82 μM respectively, rendering it a more suitable probe for hydrazine, due to low symmetry.