Fig. 5 | Nature Communications

Fig. 5

From: Doping strain induced bi-Ti3+ pairs for efficient N2 activation and electrocatalytic fixation

Fig. 5

Structural and compositional characterizations. High-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) of a undoped TiO2 and b Zr-TiO2 samples. Single Zr4+ ions were highlighted by red circles. c Electron energy loss spectroscopy (EELS) profiles of the Ti-L2, 3 edge recorded across the undoped TiO2, Ce-TiO2, and Zr-TiO2 samples. d Ti 2p X-ray photoelectron spectroscopy (XPS) spectra of the Zr-TiO2, Ce-TiO2, and undoped TiO2, samples. (Source data are provided as a Source Data file.)

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