High-sensitivity CO electrochemical gas sensor based on a superconductive C-loaded CuO-CeO2 nanocomposite sensing material

The surperconductive C-loaded CuO-CeO2 catalyst was fabricated by a high temperature solid phase reaction. The catalyst was annealed at 500 degrees C for 4 h then was characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM), respectively. The results showed that the as-prepared catalyst was consisted of the particles with the size of 20-50 nm. The gas sensing properties of the superconductive C-loaded CuO-CeO2 to CO were investigated at room temperature. In addition, the as-prepared catalyst exhibited superior activity toward CO. The sensor shows characteristics of a practicaluse level: range, 0.1-1000 ppm; sensitivity, 192 mV/ppm; response time, 9 s.

Automated summary

The superconductive C-loaded CuO-CeO2 catalyst was fabricated through a high temperature solid phase reaction and annealed at 500 degrees C for 4 hours. Characterized by XRD, FE-SEM, and TEM, the catalyst was found to be composed of particles sized 20-50 nm. The gas sensing properties towards CO showed superior activity at room temperature, with practical sensor characteristics: range 0.1-1000 ppm, sensitivity 192 mV/ppm, and response time 9 seconds.