Study of amperometric ammonia sensor

By cyclic voltammetry of linear sweep voltammetry,the electrochemical oxidation characteristics of ammonia were compared on different smooth eletrode including Pd,Pt,Rh,Au.It was found that platinum has excellent activation and good selectivity aiming at the electrochemical oxidation of ammonia.The nanoplatinum synthesized with redox method worked as catalysis of sensor and neutral electrolyte worked as support medium of the sensor.By the improvement of technics and addition of new materials,ammonia gas sensor exhibits good characteristics in stability,accuracy,recurrence sensitivity and linearity.