Post transition metal substituted Keggin-type POMs as thin film chemiresistive sensors for H₂O and CO₂ detection

Chemiresitive sensing allows the affordable and facile detection of small molecules such as H2O and CO2. Herein, we report a novel class of Earth-abundant post transition metal substituted Keggin polyoxometalates (POMs) for chemiresistive sensing applications, with conductivities up to 0.01 S cm(-1) under 100% CO2 and 65% Relative Humidity (RH).