▎ 摘　　要

NOVELTY - An ultra-thin all-solid formaldehyde electrochemical gas sensor comprises electrodes, solid electrolyte, and a catalytic layer arranged between each electrode and the solid electrolyte. The electrodes comprise working electrode, reference electrode and counter electrode. The catalytic layer comprises a slurry. The specific slurry is obtained by mixing single-walled carbon nanotubes, graphene, platinum, rhodium, palladium, silver, nano tin oxide, copper oxide, titanium dioxide, cobalt oxide, nano silicon dioxide, Nafion (RTM: sulfonated tetrafluoroethylene based fluoropolymer-copolymer ) solution and polyvinylidene fluoride (PVDF) solution. The slurry has viscosity of 100-300/Pa.second and a solid mass fraction of 30-45%. USE - Ultra-thin all-solid gas sensor used for electrochemical formaldehyde detection. ADVANTAGE - The ultra-thin all-solid-state formaldehyde electrochemical gas sensor has high anti-interference performance, and is suitable for real-time detection of formaldehyde in daily life.