Application of Nafion electrolytes for the detection of humidity in a corrosive atmosphere

摘要: Abstract Using platinum electrodes and Nafion as the solid electrolyte, a device for measuring humidity in chlorine–air atmosphere has been assembled. Deposition of on polymer is achieved by electroless plating from tetraamine chloride, Pt(NH 4 ) 2 Cl ·H O, reduction sodium borohydride (NaBH ). The sensor was calibrated terms impedance function relative humidity, using Frequency Response Analyser. frequency range 10 −2 –10 7 Hz an amplitude either 70 or 100 mV applied. At very low only bulk process observed but when moisture content increased, additional takes place at electrode/electrolyte interface. This reflected form spike 45° to real axis represents diffusion into out platinum/Nafion composite. Maximum conductivity 433 K. maximum operating temperature about 473 K ascertained thermal analysis Nafion. In industrial practice, can be operated with simpler controller, which would allow fixed frequency. retains its physical chemical integrity after use atmosphere.