Development of Graphene/CdSe Quantum Dots‐Co Phthalocyanine Nanocomposite for Oxygen Reduction Reaction

Abstract

Nanocomposites containing CdSe quantum dots, tetra(4‐(4,6‐diaminopyrimidin‐2‐ylthio) phthalocyaninatocobalt(II)) (CoPyPc) and reduced graphene nanosheets (rGNS) were devoloped and used for the modification of a glassy carbon electrode. Characterization of the nanocomposites was done by transmission electron microscopy (TEM) and X‐ray diffraction (XRD) analyses. Cyclic voltammetry (CV) was used for electrochemical characterization of the prepared nanocomposite for oxygen reduction reaction. The oxygen reduction activity for rGNS/CdSe‐CoPyPc nanocomposite was found to be superior over the individual nanomaterials in this study. The activity of the nanocomposite towards oxygen reduction was also tested for tolerance to methanol crossover effect using chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS) studies.

A Novel Strategy for Simultaneous Determination of Dopamine and Uric Acid Using a Carbon Paste Electrode Modified with CdTe Quantum Dots

“…The application of QDs mainly involved fields such as solar cell, laser, photoelectric diode, bio-targeting, drug delivery, protein tracking, cancer diagnoses, cellimaging, light-emitting diode, bio-labeling, modified electrodes and optical biomarkers [2]. It can predict that QDs showed immense and promising prospects in electrochemical as electrode modified materials due to their very small size, large specific surface area and excellent biocompatibility [3,4]. It can predict that QDs showed immense and promising prospects in electrochemical as electrode modified materials due to their very small size, large specific surface area and excellent biocompatibility [3,4].…”

Electrode modification using nanocomposites of electropolymerised cobalt phthalocyanines supported on multiwalled carbon nanotubes

“…All terminal -NH 2 functional groups are capable of oxidative coupling to form straight and branched chains tetrafluoroborate (TBABF 4 ) were from Sigma Aldrich. CoPyPc [10] and CoTAPc [18] were synthesized according to literature.…”

“…In this work, we fabricate an electrocatalytic platform in two steps: (i) firstly by dropdrying multiwalled carbon nanotubes (MWCNTs) on a glassy carbon electrode followed by (ii) electropolymerization of the cobalt phthalocyanine (CoPc) derivatives. The CoPc derivatives are the recently reported [10] tetra(4)-(4,6-diaminopyrimidin-2-ylthio) cobalt(II) phthalocyanine (CoPyPc) and the well-known cobalt tetraamino phthalocyanine (CoTAPc). We have reported on the electrocatalytic behavior of CoPyPc or CoTAPc in the presence of MWCNT when the CoPc derivatives and MWCNT are adsorbed onto glassy carbon electrode (GCE) [10,11].…”

“…The CoPc derivatives are the recently reported [10] tetra(4)-(4,6-diaminopyrimidin-2-ylthio) cobalt(II) phthalocyanine (CoPyPc) and the well-known cobalt tetraamino phthalocyanine (CoTAPc). We have reported on the electrocatalytic behavior of CoPyPc or CoTAPc in the presence of MWCNT when the CoPc derivatives and MWCNT are adsorbed onto glassy carbon electrode (GCE) [10,11]. Adsorption is a fast and easy method.…”

Comparative electrocatalytic studies of nanocomposites of mixed and covalently linked multiwalled carbon nanotubes and 4-(4,6-diaminopyrimidin-2-ylthio) phthalocyaninato cobalt(II)

“…The synergistic electrocatalytic performance of the nanocomposites produced from the two processes is then systematically compared side-by-side. We have reported on the electrocatalytic behavior of CoPyPc in the presence of MWCNT when both are adsorbed onto glassy carbon electrode (GCE) [20]. Adsorption is a fast and easy method.…”