Fig. 7: Long-term photocatalytic HER performance, electrochemical properties, and HR-TEM analysis of the film after photocatalytic experiments.

a HER performance of the film with and without Pt-co-catalysts. b Long-term photocatalytic HER performance (100 h experiment; then fresh TEOA was added at 100 h for another 50 h photocatalytic experiment). c HER polarization curves in 0.1 M KOH solution. d HR-TEM image of CTF film after photocatalytic experiment. e High-angle annular dark-field scanning transmission election microscope (HAADF-STEM) image of Pt NP-loaded CTF films. f EDS mapping; green: C; blue: N; red: Pt.