Enhanced electropromotion of methane combustion on palladium catalysts deposited on highly porous supports

► Pd film was deposited on a combination of porous-dense Y2O3-stabilized-ZrO2. ► The use of porous interlayer led to a more active catalyst due to high dispersion. ► Despite its high in-plane resistance, it shows a major enhancement in activity. ► NEMCA is observed at comparable performance with dense supported samples.