Electrooxidation of Chlorophenols Catalyzed by Nickel Octadecylphthalocyanine Adsorbed on Single‐Walled Carbon Nanotubes

We described the synthesis of nickel octadecylphthalocyanine (NiPc(C 10 H 21 ) 8 ), followed by its adsorption on single‐walled carbon nanotubes (SWCNT) to form SWCNT‐NiPc(C 10 H 21 ) 8 conjugates. SWCNT‐NiPc(C 10 H 21 ) 8 was used to modify a glassy carbon electrode (GCE) and for the electrooxidation of 4‐chlorophenol and 2,4‐dichlorophenol. The SWCNT and NiPc(C 10 H 21 ) 8 have a synergistic effect on each other in terms of improving electrocatalysis for the detection of chlorophenols. The stability of the electrode improved in the presence of NiPc(C 10 H 21 ) 8 or NiPc compared to the bare GCE. The presence of SWCNT improves the electrocatalytic behaviour of NiPc(C 10 H 21 ) 8 but not of unsubstituted NiPc. All modified electrodes showed improved stability towards the detection of 2,4‐dichlorophenol. The best stability for 4‐CP detection was observed in the presence of SWCNT for NiPc(C 10 H 21 ) 8 .