Fluorinated phosphonium ionic liquid boosts the N2-adsorbing ability of TiO2 for efficient photocatalytic NH3 synthesis

A novel ionic liquid ([P 4,4,4,4 ][PF 6 ])–water reaction solution system was constructed, transforming the TiO 2− x surface to aerophilic. N 2 dissolution and adsorption were promoted, greatly improving N 2 fixation performance.