He used the cartidge on the hazardous canister attached to the platform. That explosion released the smoke in the area. I am still convinced the only logical use in the movie for the sticky gun was on the roof of the Garden that he blasted. Makes sense not to slow down the momentum by showing him placing the charges.The sticky bomb he put on the railing when he was fighting riddler goons and I believe he tossed a smoke bomb during the fight also, but I could be remembering wrong. I intend to see it on HBO Max come April if I don't go to see it in theaters again.