Highly sensitive amperometric CO sensor using nanocomposite C-loaded PdCl2–CuCl2 as sensing electrode materials

•A novel electrode material was firstly prepared by the facile method.•The effect of the electrode materials on the sensing performance was evaluated.•The as-fabricated CO gas sensor has superior sensing property.•This work provides a facile method to prepare other kind of working electrode materials.

A novel C-loaded PdCl2–CuCl2 electrode material was prepared by the facile method without the use of any additive or organic active agent. It was used to fabricate a solid-state planar electrochemical carbon monoxide sensor. The effect of the working electrode used in amperometric gas sensors on the performance of sensitivity, detection limit was evaluated. The results showed that the sensor has characteristics of a practical-use level: response time, 10 s; range, 0–100 ppm; sensitivity, 0.35 μA/ppm.

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