Design And Electrochemical Applications Of Integrated Electrode Based On Copper Substrate

In recent years, the research of the nanomaterials has been rapid developed, dueto people’s increasing demand for nanomaterials, and has been widely used in thepaint, traditional materials, medical equipment, electronic equipment and otherindustries. It is worth mentioning that composite nanomaterials show different fromgeneral macroscopic materials of mechanical, thermal, electrical, magnetic and opticalproperties, may also have the original component does not have special performanceand function, it is a kind of new high technology and new materials, has a broadcommercial development and application prospect. In this paper, we realized thecontrolled synthesis of Ag nanodendrites, Ag2O nanowire arrays, Cu2S nanoplates onthe metal substrateuse by using wet chemical synthesis methody, the correspondingelectrochemical properties were tested.Firstly, we achieved the controllable synthesis of Ag nanodendrites on Cusubstrate. Based on the metal substrate, the composite electrode can be directly usedas working electrode of electrochemical sensor and does not need to adopt thenanomaterials on the traditional working electrode such as glassy carbon electrode orgold electrode by the method of physical adsorption, preventing the materials fall offin electrochemical applications. In addition, Ag nanodendrites has larger specificsurface area, is advantageous to the process of charging and discharging adsorptionand stripping of the charged particle, it can be significantly improve theelectrochemical performance of electrode. Electrochemical tests show that thecomposite electrode has good electrical catalytic reduction in the concentration of0.2to19.2mM towards H2O2and also has favourable electrical catalytic oxidationtowards glucose within the scope of the concentration of0.02to7.4mM, is expectedto achieve water samples in the hydrogen peroxide and quantitative detection ofglucose.Secondly, we achieved the controllable synthesis of Ag2O nanowires on Cusubstrate. Ag2O nanowire arrays uniform growth on Cu substrate, and has a largerspecific surface area, easier to adsorption and stripping of electrically chargedparticles and Faraday electrochemical reaction, so it can be applied in electrochemical sensor and catalyst. Electrochemical tests show that the composite electrode has thegood electrical catalytic oxidation with hydrazine hydrate (HZ). It can implementeffective detection in the concentration range of0.2-1270μM with a low detectionlimit of0.01μM. The materials also can serve as the catalyst layer for a direct HZ fuelcell, the current density of HZ oxidation on composite electrode is94.4mA cm2andhas a low onset potential (0.85V).Thirdly, we achieved the controllable synthesis of Cu2S nanoplates on Cusubstrate. Rose-like Cu2S nanostructure made up of thickness nanoplates weresuccessfully one step synthesized on Cu rod with a simple wet chemical method, thenmanufacture a nonenzymatic cholesterol sensor (Cu2S NPs/CRIE). The results ofelectrochemical testing showed that the sensor has good electrocatalysis towarscholesterol in the concentration range of0.01-6.8mM,, and detection limit as low as0.1M, compared with Cu2S nanoparticals modified glassy carbon electrode (Cu2SNPs/GCE), both from the detection range and detection limit has obvious advantages.