Electrooxidation of glucose on nanoporous MCM-41-cryptand-Pd modified carbon paste electrode in alkaline solution

Mesoporous silicate, MCM-41, is a member of a new family of mesoporous molecular sieves, M41S, invented by researchers in 1992 [1]. The most interesting feature of MCM-41 is its regular pore system which consists of hexagonal array of unidimensional, hexagonally shaped pores. The pore diameter of MCM-41 is systematically between 2-10 nm [2]. In this study, a new nanoporous Pd-cryptand complex anchored onto MCM-41 was synthesized through a simple method and its morphology and spectral characters was studied. The electrocatalytic properties of modified carbon paste electrode (CPE) with MCM-41-cryptand-Pd toward electrooxidation of glucose in alkaline solution were investigated. It was confirmed that the application of modified CPE significantly reduces the oxidation potential of glucose about 250 mV as well as increasing oxidation currents. The proposed electrode was successfully used as a new and efficient sensor for determination of glucose in various samples.