ABSTRACT
This research is based on the modification of a glassy carbon electrode with cobalt (II) tetra carboxy phthalocyanine and nitrogen doped graphene oxide nanosheets composite (CoTCPc/N-GONS) was used for the electrocatalytic oxidation of nitrites. The synthesised cobalt (II) tetra carboxy phthalocyanine (CoTCPc) and nitrogen doped graphene oxide nanosheets (N-GONS) were characterized by FTIR spectroscopy, UV-Vis spectroscopy, electrochemical impedance and cyclic voltammetry. The electrode surface area for CoTCPc/N-GONS-GCE was 0.174 cm2, which was at least twice that of a BGCE indicating that the modified electrode provided larger surface area for electro catalysis. The modified electrode had a surface coverage of 1.22 . The CoTCPc/N-GONS-GCE had kapp and RCT values of 3.64 and 145.47 Ω respectively. The electrochemical detection of the nitrite with CoTCPc/N-GONS-GCE was successful producing high peak currents compared to other electrodes. The electrocatalytic oxidation of nitrite was determined to be a 1st order reaction and with a Tafel slope of 270 mV/decade. Limit of detection (LOD) was M and Limit of quantification (LOQ) was M. The electrode showed good reproducibility with lower oxidation potential at 0.86 V and high sensitivity towards nitrite.
NDHLOVU, T (2021). Electrocatalytic Oxidation Of Nitrites On Glassy Carbon Electrode Modified With Cobalt (Ii) Tetra-Carboxy Phthalocyanine/ Nitrogen Doped Graphene Oxide Nanosheets Composite. Afribary. Retrieved from https://afribary.com/works/electrocatalytic-oxidation-of-nitrites-on-glassy-carbon-electrode-modified-with-cobalt-ii-tetra-carboxy-phthalocyanine-nitrogen-doped-graphene-oxide-nanosheets-composite
NDHLOVU, TERENCE "Electrocatalytic Oxidation Of Nitrites On Glassy Carbon Electrode Modified With Cobalt (Ii) Tetra-Carboxy Phthalocyanine/ Nitrogen Doped Graphene Oxide Nanosheets Composite" Afribary. Afribary, 09 May. 2021, https://afribary.com/works/electrocatalytic-oxidation-of-nitrites-on-glassy-carbon-electrode-modified-with-cobalt-ii-tetra-carboxy-phthalocyanine-nitrogen-doped-graphene-oxide-nanosheets-composite. Accessed 26 Apr. 2024.
NDHLOVU, TERENCE . "Electrocatalytic Oxidation Of Nitrites On Glassy Carbon Electrode Modified With Cobalt (Ii) Tetra-Carboxy Phthalocyanine/ Nitrogen Doped Graphene Oxide Nanosheets Composite". Afribary, Afribary, 09 May. 2021. Web. 26 Apr. 2024. < https://afribary.com/works/electrocatalytic-oxidation-of-nitrites-on-glassy-carbon-electrode-modified-with-cobalt-ii-tetra-carboxy-phthalocyanine-nitrogen-doped-graphene-oxide-nanosheets-composite >.
NDHLOVU, TERENCE . "Electrocatalytic Oxidation Of Nitrites On Glassy Carbon Electrode Modified With Cobalt (Ii) Tetra-Carboxy Phthalocyanine/ Nitrogen Doped Graphene Oxide Nanosheets Composite" Afribary (2021). Accessed April 26, 2024. https://afribary.com/works/electrocatalytic-oxidation-of-nitrites-on-glassy-carbon-electrode-modified-with-cobalt-ii-tetra-carboxy-phthalocyanine-nitrogen-doped-graphene-oxide-nanosheets-composite