This result indicates that the surface nitrogen atoms are gradually depleted with increasing oxidation durations. EDX analysis indicates that the N content in the TiN- x samples gradually decreases with increasing holding time, while the oxygen content shows an increasing trend ( Figure S7 ).
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Dual-Functional Schottky-Barrier-Free Plasmonic TiN/TiO<sub>2</sub> Photocatalyst for Efficient NH<sub>3</sub> and H<sub>2</sub> Production.
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