Urea-Nonstoichiometric Co-modulated LaMnO3 for Ultra-High Gaseous Hg0 Uptake Across a Broad Temperature Range

2U-La 0.8 MnO 3 was developed with a Hg 0 saturated adsorption capacity of 23.86 mg g −1 , exceeding those of previously reported metal oxides and exhibiting almost 100% removal efficiency across a wide temperature range (40–250 °C).