Influence of Metal Nanoparticles on the Electrocatalytic Oxidation of Glucose by Poly(Ni^IIteta) Modified Electrodes

Abstract

Conductive polymeric [Ni II (teta)] 2þ (teta ¼ C-meso-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetra-azacyclotetradecane) films (poly(Ni)) have been deposited on the surface of glassy carbon (GC), Nafion (Nf) modified GC (GC/Nf) and Nf stabilized Ag and Au nanoparticles (NPs) modified GC (GC/Ag-Nf and GC/Au-Nf) electrodes. The cyclic voltammogram of the resulting electrodes, show a well defined redox peak due to oxidation and reduction of poly(Ni) system in 0.1 M NaOH. They show electrocatalytic activity towards the oxidation of glucose. AFM studies reveal the formation of poly(Ni) film on the modified electrodes. Presence of metal NPs increases electron transfer rate and electrocatalytic oxidation current by improving the communication within the Nf and poly(Ni) films. In the presence of metal NPs, 4 fold increase in current for glucose oxidation was observed.

Selective determination of isoniazid using bentonite clay modified electrodes

“…S1). Increased peak separation and decreased I pa /I pc ratio observed in the present system, indicate the poor reversibility of Fe(dmbpy) 3 2+ in clay film [35]. It seems that the oxidation process is slow and some of the Fe(dmbpy) 3 2+ species oxidizes at higher potential than the peak potential without contributing to the peak current.…”

Metal‐containing Polymers via Electropolymerization

“…The cyclam ligand was used to create cobalt(III)‐, nickel(II)‐, and copper(II)‐containing type‐I polymers 42. Ganesan and co‐workers employed the cyclam derivative meso ‐5,5,7,12,12,14‐hexamethyl‐1,4,8,11‐tetraazacyclotetradecane (teta) for the complexation of nickel(II) and electrochemical coating of different types of electrodes, namely glassy carbon, Nafion‐modified glassy carbon as well as glassy carbon electrodes with Nafion‐ stabilized silver and gold nanoparticles 43. The modified electrodes enabled an improved catalytic oxidation of glucose; in particular, the incorporation of nanoparticles enhanced the electron transfer ability of the obtained polymer film.…”

A Non-enzymatic Electrochemical Sensor for Glucose Detection Based on Ag@TiO2@ Metal-Organic Framework (ZIF-67) Nanocomposite

“…Noble metal-modified electrodes show increased electron transfer rates due to higher conductivity, electrocatalytic properties, and large surface areas. Also, size and morphology of the NPs of such noble metals greatly influence their electrocatalytic properties and such NPs can be exploited to lower over potentials for redox reactions (Pal and Ganesan, 2009;Azad and Ganesan, 2010;Rastogi et al, 2014;Gupta and Ganesan, 2015;Sonkar and Ganesan, 2015). Furthermore, to prepare an efficient electrocatalytic sensor, NPs are usually immobilized on solid supports such as metal organic frameworks (MOFs) (Zhu et al, 2017).…”