Exclusive detection of ethylene using metal oxide chemiresistors with a Pd–V2O5–TiO2 yolk–shell catalytic overlayer via heterogeneous Wacker oxidation

A bilayer design based on yolk–shell structured Pd loaded V 2 O 5 –TiO 2 and hollow structured In 2 O 3 showed unprecedentedly high selectivity and response toward ethylene through concurrent Wacker oxidation of ethylene and filtering of interfering gases.