Fig. 5: Mechanistic investigation of enriched Cl− at oxygen-vacancy sites. | Nature Communications

Fig. 5: Mechanistic investigation of enriched Cl− at oxygen-vacancy sites.

From: Photoelectrocatalytic C–H halogenation over an oxygen vacancy-rich TiO2 photoanode

Fig. 5: Mechanistic investigation of enriched Cl− at oxygen-vacancy sites.The alternative text for this image may have been generated using AI.

a LSV curves at scan rate of 10 mV s−1 in 0.5 M Na2SO4 or NaCl electrolyte under AM 1.5G (100 mW cm−2) illumination. b Schematic diagram of the pretreatment process of TiO2-Ov-400 and TiO2 samples for further measurements (denoted as TiO2-Ov-400-Cl and TiO2-Cl). c STEM combined EDS mapping images of TiO2-Ov-400-Cl and TiO2-Cl. Scale bars: 100 nm. d Cl 2p XPS spectra of TiO2-Ov-400-Cl and TiO2-Cl. e ARXPS spectra of Cl on TiO2-Ov-400-Cl after Ar+ sputtering. f IC spectrogram of NaCl solution after adsorbed by different TiO2-Ov-T samples. g Cl− adsorption behavior of TiO2-Ov-400 with different concentration of oxygen vacancy. h Adsorption energy of Cl− over TiO2 and TiO2-Ov. Inset: optimized geometries for TiO2 and TiO2-Ov adsorbed with Cl−, the color of each element is also labeled. a.u.: arbitrary units.

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