Photocatalytic Nitrogen Reduction by Ti ₃ C ₂ MXene Derived Oxygen Vacancy‐Rich C/TiO ₂

In this work, oxygen vacancy-rich C/TiO2 (OV-C/TiO2) samples are prepared by a one-step calcination approach using Ti3C2 MXene as the precursor, and used for photocatalytic N2 reduction. The NH3 yields of all OV-C/TiO2 exceed those achieved on commercial anatase TiO2 P25, with both H2O CH3OH proton sources. Among them, OV-C/TiO2-600 offers remarkable synthesis rates, which 41.00 µmol g−1 h−1 (with source) 84.00 source). photocurrent fluorescence spectra show that exhibit highest generation/separation rate longest lifetime photocarriers among samples. ESR TPD experiments confirm much more efficient chemisoption surface than TiO2. Moreover, DFT calculations further demonstrate conversion to through Gibbs free energy release leading alternating pathway low barriers, vacancy surface.