PROJECT TITLE :

Nitrate sensing based on Pd-Sn bimetallic composite: a comparison between a bulk electrode and a microband electrode array

ABSTRACT:

This work presents a bulk electrode and a microband electrode array for electrochemical nitrate sensing in acidic medium. The microelectrode array is fabricated on silicon wafer by micro electro-mechanical system technique. Electrodepostion was dole out to change tin onto the majority palladium electrode and therefore formed Pd-Sn bimetallic composite. On the microelectrode array, Pd and Sn were successively deposited to obtain a double-layer composite. The performance of the two types of electrodes towards nitrate sensing was investigated and compared. The microelectrode array showed higher sensitivity and repeatability than the bulk electrode. The results are in line with the distinctive properties of the microelectrode array in electrochemical analysis like high current density and low background noise.