Catalytic Hydrodefluorination of Fluoromethanes at Room Temperature by Silylium‐ion‐like Surface Species

'Al'l about F: Aluminum chlorofluoride (ACF) catalyzes the hydrodefluorination, as well as Friedel–Crafts reactions of fluorinated methanes in the presence of Et3SiH. A surface-bound silylium-ion-like species is considered to be a crucial intermediate in achieving the CF bond cleavage.